DOCSLIB.ORG

Sub-Wavelength Resonant Structures at Microwave and Optical Frequencies

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Sub-Wavelength Resonant Structures at Microwave and Optical Frequencies UC San Diego UC San Diego Electronic Theses and Dissertations Title Sub-wavelength resonant structures at microwave and optical frequencies Permalink https://escholarship.org/uc/item/3th147ss Author Simić, Aleksandar Publication Date 2011 Peer reviewed|Thesis/dissertation eScholarship.org Powered by the California Digital Library University of California UNIVERSITY OF CALIFORNIA, SAN DIEGO Sub-Wavelength Resonant Structures at Microwave and Optical Frequencies A dissertation submitted in partial satisfaction of the requirements for the degree Doctor of Philosophy in Physics by Aleksandar Simi´c Committee in charge: Professor Yeshaiahu Fainman, Chair Professor Sheldon Schultz, Co-Chair Professor Leonid V. Butov Professor Vitaliy Lomakin Professor Clifford M. Surko 2011 Copyright Aleksandar Simi´c,2011 All rights reserved. The dissertation of Aleksandar Simi´cis approved, and it is acceptable in quality and form for publication on microfilm and electronically: Co-Chair Chair University of California, San Diego 2011 iii DEDICATION To my children Ekatarina and Nikola, and my wife Blaˇzenka. I am so happy to have you. iv EPIGRAPH The important thing is not to stop questioning. — Albert Einstein v TABLE OF CONTENTS Signature Page.................................. iii Dedication..................................... iv Epigraph.....................................v Table of Contents................................. vi List of Figures.................................. ix List of Tables................................... xi Acknowledgements................................ xii Vita and Publications.............................. xiv Abstract of the Dissertation........................... xv Chapter 1 Introduction............................1 1.1 Sub-wavelength scale resonators..............1 1.1.1 Passive sub-wavelength resonators.........1 1.1.2 Active sub-wavelength resonators.........3 1.2 Dissertation organization..................4 Chapter 2 Experimental confirmation of negative phase change in planar negative index material samples.................6 2.1 Introduction.........................6 2.2 Characterization.......................7 2.2.1 Methods of confirming the negative index.....7 2.2.2 Experimental setup and calibration........9 2.2.3 Experimental results and discussion........ 11 2.3 Conclusion.......................... 14 Chapter 3 Room-temperature sub-wavelength metallo-dielectric lasers.. 16 3.1 Introduction......................... 16 3.2 Design............................ 17 3.3 Design and Simulation................... 20 3.4 Fabrication......................... 22 3.5 Characterization....................... 23 3.6 Conclusion.......................... 27 3.7 Methods and additional material.............. 28 3.7.1 Simulations..................... 28 vi 3.7.2 Purcell factor estimation.............. 31 3.7.3 Fabrication..................... 31 3.7.4 Characterization results.............. 32 Chapter 4 Cryogenic operation of nanolaser structures........... 35 4.1 Introduction......................... 35 4.2 Advantages of cryogenic operation............. 36 4.3 Experimental results of cryogenic operation........ 38 4.3.1 Temperature vs. size tradeoff........... 38 4.3.2 Lasing results at 77 K................ 41 4.4 Discussion and conclusion................. 44 4.4.1 Degradation of nanolaser performance with time. 44 4.4.2 Lasing at different modes at 77 K......... 46 4.4.3 Conclusion...................... 47 Chapter 5 Wafer bonded sub-wavelength metallo-dielectric laser..... 49 5.1 Introduction......................... 49 5.2 Design and Simulations................... 51 5.3 Fabrication......................... 53 5.4 Measurements........................ 56 5.5 Conclusion.......................... 60 Chapter 6 Thresholdless nanoscale coaxial lasers.............. 62 6.1 Introduction......................... 62 6.2 Design, simulation and fabrication............. 63 6.3 Characterization and analysis............... 66 6.4 Conclusion.......................... 69 6.5 Methods and additional materials............. 70 6.5.1 Fabrication..................... 70 6.5.2 Measurements.................... 71 6.5.3 Rate equation model................ 72 Chapter 7 Future directions and conclusion................. 74 7.1 Future directions...................... 74 7.1.1 Direct current injection nanolasers......... 74 7.1.2 Measuring coherence................ 79 7.1.3 Comparing optical losses of different metals... 80 7.2 Conclusions......................... 82 Appendix A Meta-material inspired sub-wavelength antenna........ 84 A.1 Introduction......................... 84 A.2 Design and simulation of a magnetic dipole antenna... 85 A.3 Fabrication and measurements............... 88 A.4 Conclusions and future directions............. 89 vii Appendix B Permittivity () and permeability (µ) retrieval from S-matrix parameters............................. 90 B.1 Explanation of S–Matrix and S–parameters........ 90 B.2 Retrieval of and µ from S-parameters.......... 91 Appendix C Optical setup for characterization of nanolasers........ 94 C.1 Setup design......................... 94 C.2 Cryostat implementation.................. 97 C.2.1 Modifications for electrically pumped nanolasers. 97 C.3 Summary.......................... 100 Appendix D Analytical solution of electromagnetic modes in coaxial waveg- uide................................ 101 D.1 Introduction......................... 101 D.2 Solution of wave equation in cylindrical coordinates... 102 D.3 Applying the boundary conditions............. 105 D.3.1 Special cases..................... 108 D.4 Numerical solver, results and discussion.......... 108 Appendix E Explanation of the Purcell effect................. 111 Appendix F Second order coherence g(2) ................... 114 F.1 Background information on coherence........... 114 F.2 Quantum (QED) treatment of coherence......... 115 F.3 Young’s double slit experiment and g(1) .......... 116 F.4 Second order coherence function — g(2) .......... 118 F.5 Measuring second order coherence — g(2)(0)....... 119 F.5.1 Hanbury Brown and Twiss experiment...... 119 F.5.2 Streak camera approach.............. 121 Bibliography................................... 123 viii LIST OF FIGURES Figure 1.1: Split ring resonator.........................2 Figure 2.1: Schematic representation of various experimental approaches for verification of negative index...................9 Figure 2.2: Free-space transmitted phase measurement system....... 10 Figure 2.3: Setup calibration using Teflon sheets............... 11 Figure 2.4: Experimental and simulation data for |S21| vs. frequency.... 12 Figure 2.5: Experimental and simulation data for phase change of |S21| vs. frequency.............................. 13 Figure 2.6: Refractive index n vs frequency calculated from experimental data and numerical simulation.................. 14 Figure 3.1: Geometry and mode shape for a thick semiconductor disk (a,b), and the same disk covered by optically thick layer of gold(c – e). 18 Figure 3.2: Optical design of optimized nanolaser geometry and simulation of electromagnetic mode profile................... 21 Figure 3.3: Various stages of the nanolaser fabrication process........ 23 Figure 3.4: Light–light curve for the nanolaser at room temperature..... 24 Figure 3.5: Evolution of the emission spectrum from PL to lasing...... 25 Figure 3.6: Estimation of the effective refractive index of the MQW gain medium................................ 26 Figure 3.7: Pump absorbtion in the gain core (3D FEM simulation).... 30 Figure 4.1: Photoluminescence (PL) of bulk InGaAsP as a function of tem- perature............................... 37 Figure 4.2: Photoluminescence (PL) peak of bulk InGaAsP as a function of temperature............................. 37 Figure 4.3: Lasing threshold as a function of temperature.......... 39 Figure 4.4: Size map of a typical nanolaser sample array........... 40 Figure 4.5: Size vs. temperature — laser performance at 295 K and 77 K.. 41 Figure 4.6: Emission spectra for Dcore = 604 nm laser at 295 K and 77 K.. 42 Figure 4.7: Lasing characteristics for Dcore = 284 nm laser at 77 K..... 43 Figure 4.8: Comparison of nominally identical nanolasers.......... 45 Figure 4.9: Nanolaser lasing at different modes 295 K and 77 K....... 47 Figure 4.10: Nanolaser lasing at multiple modes simultaneously 77 K.... 48 Figure 5.1: Scheme of the original, and wafer-bonded sub-wavelength me- tallo-dielectric laser......................... 50 Figure 5.2: Schematic drawing and FEM simulation of the wafer bonded metallo-dielectric resonator design................ 53 Figure 5.3: Fabrication steps of a wafer bonded metallo-dielectric laser... 54 Figure 5.4: SEM micrographs after two steps in the fabrication process.. 55 ix Figure 5.5: Room temperature lasing results for a nanolaser with gain core radius of Rcore = 450 nm...................... 58 Figure 5.6: 77 K lasing results for a nanolaser with gain core radius of Rcore = 450 nm........................... 59 Figure 5.7: 77 K lasing results for a nanolaser with gain core radius of Rcore ≈ 250 nm........................... 60 Figure 6.1: Schematic representation of coaxial nanolaser and SEM micro- graphs of fabricated samples.................... 64 Figure 6.2: Modal spectra of cavities of Structure A and Structure B.... 66 Figure 6.3: Lasing results in Structure A ................... 68 Figure 6.4: Thresholdless lasing in Structure B ................ 69 Figure 7.1: Schematic representation of electrically pumped nanolaser de- sign, and SEM micrographs of
Load more

Recommended publications
  • Nanolaser Arrays
    Nanophotonics 2021; 10(1): 149–169 Review Suruj S. Deka*, Sizhu Jiang, Si Hui Pan and Yeshaiahu Fainman Nanolaser arrays: toward application-driven dense integration https://doi.org/10.1515/nanoph-2020-0372 1 Introduction Received July 4, 2020; accepted September 8, 2020; published online September 29, 2020 In the quest for attaining Moore’s law-type scaling for Abstract: The past two decades have seen widespread photonics, miniaturization of components for dense efforts being directed toward the development of nano- integration is imperative [1]. One of these essential scale lasers. A plethora of studies on single such emitters nanophotonic components for future photonic inte- have helped demonstrate their advantageous character- grated circuits (PICs) is a chip-scale light source. To istics such as ultrasmall footprints, low power consump- this end, the better part of the past two decades has tion, and room-temperature operation. Leveraging seen the development of nanoscale lasers that offer knowledge about single nanolasers, the next phase of salient advantages for dense integration such as ultra- nanolaser technology will be geared toward scaling up compact footprints, low thresholds, and room- design to form arrays for important applications. In this temperature operation [2–4]. These nanolasers have review, we discuss recent progress on the development of been demonstrated based on a myriad of cavity designs such array architectures of nanolasers. We focus on and physical mechanisms some of which include pho- valuable attributes and phenomena realized due to tonic crystal nanolasers [5–8], metallo-dielectric nano- unique array designs that may help enable real-world, lasers [9–15], coaxial-metal nanolasers [16, 17], and practical applications.
    [Show full text]
  • Title All-Dielectric Nanolaser with Subnanometer Field Confinement
    FRONT MATTER Title All-Dielectric Nanolaser with Subnanometer Field Confinement Authors Hao Wu,1 Peizhen Xu,1 Xin Guo,1* Pan Wang,1 Limin Tong1,2* Affiliations 1 Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China. 2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China. *[email protected]; [email protected]. Abstract The ability to generate a laser field with ultratight spatial confinement is important for pushing the limit of optical science and technology. Although plasmon lasers can offer sub-diffraction-confined laser fields, it is restricted by a trade-off between optical confinement and loss of free-electron oscillation in metals. We show here an all-dielectric nanolaser that can circumvent the confinement- loss trade-off, and offer a field confinement down to subnanometer level. The ultra-confined lasing field, supported by low-loss oscillation of polarized bound electrons surrounding a 1-nm-width slit in a coupled CdS nanowire pair, is manifested as the dominant peak of a TE0-like lasing mode around 520-nm wavelength, with a field confinement down to 0.23 nm and a peak-to-background ratio of ~32.7 dB. This laser may pave a way towards new regions for nanolasers and light-matter interaction. MAIN TEXT Introduction Lasers with tighter field confinement is a key to lower-dimensional light-matter interaction for applications ranging from optical microscopy, sensing, photolithography to information technology (1–3). Since the early age of laser technology, pursuing tighter field confinement in a lasing cavity mode has been a continuous effort.
    [Show full text]
  • Impact of Fundamental Temperature Fluctuations on the Frequency Stability of Metallo- Dielectric Nanolasers Sizhu Jiang ,Sihuipan , Suruj S
    IEEE JOURNAL OF QUANTUM ELECTRONICS, VOL. 55, NO. 5, OCTOBER 2019 2000910 Impact of Fundamental Temperature Fluctuations on the Frequency Stability of Metallo- Dielectric Nanolasers Sizhu Jiang ,SiHuiPan , Suruj S. Deka, Cheng-Yi Fang ,ZijunChen, Yeshaiahu Fainman, Fellow, IEEE, and Abdelkrim El Amili Abstract— The capability of nanolasers to generate coherent I. INTRODUCTION light in small volume resonators has made them attractive to be implemented in future ultra-compact photonic integrated circuits. HE miniaturization of optical resonators has established However, compared to conventional lasers, nanolasers are also Tnanolasers as promising coherent light source candidates known for their broader spectral linewidths, that are usually for future integrated nanophotonics with wide applications on the order of 1 nm. While it is well known that the broad in bio-sensing [1]–[3], imaging [4]–[6], far-field beam syn- linewidths in light emitters originate from various noise sources, thesis [7] and optical interconnects [8]. The ultra-compact there has been no rigorous study on evaluating the origins of the linewidth broadening for nanolasers to date to the best of mode volume of nanolasers also enables them to exploit our knowledge. In this manuscript, we investigate the impact the cavity quantum electrodynamics (QED) effect [9]–[12]. of fundamental thermal fluctuations on the nanolaser linewidth. In these nanocavities, conspicuous Purcell enhancement helps We show that such thermal fluctuations are one of the intrinsic to dramatically increase the modulation speed and lower noise sources in a sub-wavelength metal-clad nanolaser inducing the power consumption for optical communication systems. significant linewidth broadening. We further show that with the reduction of the nanolaser’s dimensions, i.e., mode volume, However, shrinking the dimension of a nanolaser can also be and the increase of the ambient temperature, such linewidth detrimental to its performance.
    [Show full text]
  • Photonic Crystal Nanolaser Biosensor Simplifies DNA Detection 13 January 2015
    Photonic crystal nanolaser biosensor simplifies DNA detection 13 January 2015 laser emission intensity, which in turn can also be used to sense the adsorption of biomolecules. Using laser intensity to detect biomolecules is potentially less expensive than the fluorescent tagging or spectroscopy techniques typically used in biosensors because it is a simpler procedure. When the team first set out to explore photonic crystal nanolaser sensors, they weren't focusing on the intensity of the laser emission because it's sensitive to the quality of the fabricated laser and, frankly, they didn't expect it to show sensing signals. "In the beginning we focused on wavelength behavior, but quickly noticed that [the laser emission] intensity is influenced by both pH and polymers," noted Toshihiko Baba, a professor in Yokohama National University's Department of Electrical and Computer Engineering. "Our results were very reproducible and, interestingly, we found Top view of the group's nanolaser, in which the center that the behaviors of the wavelength and intensity narrow slot (horizontal line) is the main part of the are independent." sensor. The periodic holes form a photonic crystal, and although the size of the holes appears to fluctuate they've been intentionally modified so the laser's The team was surprised by these results, which emission is effectively extracted to the top. Credit: they discovered when they deposited a protective Toshihiko Baba/Yokohama National University film of thin zirconium dioxide (ZrO2) over the device using atomic layer deposition, and then tried sensing in liquids of high or low pH and liquids containing charged polymers.
    [Show full text]
  • Dynamics of a Micro-VCSEL Operated in the Threshold Region Under Low-Level Optical Feedback
    1 Dynamics of a micro-VCSEL operated in the threshold region under low-level optical feedback Tao Wang, Xianghu Wang, Zhilei Deng, Jiacheng Sun, Gian Piero Puccioni, Gaofeng Wang, and Gian Luca Lippi Abstract—Semiconductor lasers are notoriously sensitive to quality, ease of integration and single-longitudinal mode emis- optical feedback, and their dynamics and coherence can be sion. In addition, they are less sensitive to optical feedback significantly modified through optical reinjection. We concentrate than their edge-emitting counterparts, rendering them more on the dynamical properties of a very small (i.e., microscale) Vertical Cavity Surface Emitting Laser (VCSEL) operated in attractive in many applications, in spite of their polariza- the low coherence region between the emission of (partially) tion sensitivity on which have focussed most of the optical coherent pulses and ending below the accepted macroscopic reinjection investigations (cf., e.g., [8], [9], [10], [11]). Our lasing threshold, with the double objective of: 1. studying the work focuses on the basic understanding of operation regimes feedback influence in a regime of very low energy consump- of very small devices which, in the future, could be used tion; 2. using the micro-VCSEL as a surrogate for nanolasers, where measurements can only be based on photon statistics. for transmissions and interconnects (e.g. datacenter applica- The experimental investigation is based on time traces and tions [12], [13]). Thus, we look at the dynamics of VCSELs radiofrequency spectra (common for macroscale devices) and due to non-polarization-selective feedback [14], [15], [16]. An correlation functions (required at the nanoscale). Comparison overview of the phenomenology observed in VCSELs with of these results confirms the ability of correlation functions to optical feedback can be found in [17].
    [Show full text]
  • Plasmon Lasers
    Plasmon Lasers Wenqi Zhu1,2, Shawn Divitt1,2, Matthew S. Davis1, 2, 3, Cheng Zhang1,2, Ting Xu4,5, Henri J. Lezec1 and Amit Agrawal1, 2* 1Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA 2Maryland NanoCenter, University of Maryland, College Park, MD 20742 USA 3Department of Electrical Engineering and Computer Science, Syracuse University, Syracuse, NY 13244 USA 4National Laboratory of Solid-State Microstructures, Jiangsu Key Laboratory of Artificial Functional Materials, College of Engineering and Applied Sciences, Nanjing University, Nanjing, China 5Collaborative Innovation Center of Advanced Microstructures, Nanjing, China Corresponding*: [email protected] Recent advancements in the ability to design, fabricate and characterize optical and optoelectronic devices at the nanometer scale have led to tremendous developments in the miniaturization of optical systems and circuits. Development of wavelength-scale optical elements that are able to efficiently generate, manipulate and detect light, along with their subsequent integration on functional devices and systems, have been one of the main focuses of ongoing research in nanophotonics. To achieve coherent light generation at the nanoscale, much of the research over the last few decades has focused on achieving lasing using high- index dielectric resonators in the form of photonic crystals or whispering gallery mode resonators. More recently, nano-lasers based on metallic resonators that sustain surface plasmons – collective electron oscillations at the interface between a metal and a dielectric – have emerged as a promising candidate. This article discusses the fundamentals of surface plasmons and the various embodiments of plasmonic resonators that serve as the building block for plasmon lasers.
    [Show full text]
  • Coupling in a Dual Metallo-Dielectric Nanolaser System
    4760 Vol. 42, No. 22 / November 15 2017 / Optics Letters Letter Coupling in a dual metallo-dielectric nanolaser system 1 1 2 1 1, SURUJ S. DEKA, SI HUI PAN, QING GU, YESHAIAHU FAINMAN, AND ABDELKRIM EL AMILI * 1Department of Electrical and Computer Engineering, University of California at San Diego, La Jolla, California 92093-0407, USA 2Department of Electrical and Computer Engineering, University of Texas at Dallas, Richardson, Texas 75080-3021, USA *Corresponding author: [email protected] Received 14 September 2017; revised 23 October 2017; accepted 24 October 2017; posted 25 October 2017 (Doc. ID 306989); published 15 November 2017 To achieve high packing density in on-chip photonic overlap and, hence, the Joule loss. Additionally, the metal integrated circuits, subwavelength scale nanolasers that should also aid in isolating the electromagnetic field inside each can operate without crosstalk are essential components. resonator from the surrounding environment. Whether the Metallo-dielectric nanolasers are especially suited for this isolation provided can prevent crosstalk between optical com- type of dense integration due to their lower Joule loss ponents for purposes of dense integration on chip, however, is and nanoscale dimensions. Although coupling between op- yet to be explored to the best of our knowledge. tical cavities when placed in proximity to one another has The observation of coupling between non-metal based been widely reported, whether the phenomenon is induced optical cavities when placed in proximity of each other has been for metal-clad cavities has not been investigated thus far. widely reported in a host of systems such as photonic crystal We demonstrate coupling between two metallo-dielectric nanocavities [12,13], photonic molecule microdisk lasers nanolasers by reducing the separation between the two [14–18], microring lasers [19,20], ridge lasers [21], and porous cavities.
    [Show full text]
  • Plasmonic-Photonic Crystal Coupled Nanolaser
    Plasmonic-photonic crystal coupled nanolaser Taiping Zhang1, Ségolène Callard1, Cécile Jamois1, Céline Chevalier1, Di Feng1,2, and Ali Belarouci1 1 Institut des Nanotechnologies de Lyon (INL), UMR 5270 CNRS-ECL-INSA-UCBL, Université de Lyon, Ecole Centrale de Lyon, 36 Avenue Guy de Collongue, Ecully, 69134, France 2 School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China E-mail : Ali [email protected] Abstract. We propose and demonstrate a hybrid photonic-plasmonic nanolaser that combines the light harvesting features of a dielectric photonic crystal cavity with the extraordinary confining properties of an optical nano-antenna. In that purpose, we developed a novel fabrication method based on multi-step electron-beam lithography. We show that it enables the robust and reproducible production of hybrid structures, using fully top down approach to accurately position the antenna. Coherent coupling of the photonic and plasmonic modes is highlighted and opens up a broad range of new hybrid nanophotonic devices. 1. Introduction Over the past 10 years we have witnessed a burst in the number and diversity of nanophotonics applications [1-5]. The downscaling of photonic devices that can efficiently concentrate the optical field into a nanometer-sized volume holds great promise for many emerging applications requiring tight confinement of optical fields, including information and communication technologies [6], sensors [7], enhanced solar cells [8] and lighting [9]. Photonic crystals [10, 11] are key geometries that have been studied for many years in this respect, as they provide full control over the dispersion of light by engineering the momentum of light k().
    [Show full text]
  • Loss and Gain in a Plasmonic Nanolaser
    Nanophotonics 2020; 9(10): 3403–3408 Research article Shao-Lei Wang, Suo Wang, Xing-Kun Man* and Ren-Min Ma* Loss and gain in a plasmonic nanolaser https://doi.org/10.1515/nanoph-2020-0117 new powerful tool for a variety of applications ranging Received February 14, 2020; accepted April 3, 2020; published online from on-chip optical interconnector, sensing and detec- May 23, 2020 tion, to biological labeling and tracking [1–7]. In the past decade, plasmonic nanolasers with different configura- Abstract: Plasmonic nanolasers are a new class of laser tions and field confinement capabilities have been devices which amplify surface plasmons instead of photons demonstrated including one dimensional confined devices by stimulated emission. A plasmonic nanolaser cavity can represented by metal-insulator-metal and metal-insulator- lower the total cavity loss by suppressing radiation loss via semiconductor gap mode nanolasers [8–15], two dimen- the plasmonic field confinement effect. However, laser size sional confined devices represented by plasmonic nano- miniaturization is inevitably accompanied with increasing wire lasers [16–28], and three dimensional confined total cavity loss. Here we reveal quantitatively the loss and devices represented by metallic-nanoparticle lasers and gain in a plasmonic nanolaser. We first obtain gain co- metallic-coated nanolasers [29–50]. Plasmonic nanolaser efficients at each pump power of a plasmonic nanolaser via arrays have also been demonstrated to control the emission analyses of spontaneous emission spectra and lasing directionality and wavelength [51–58]. emission wavelength shift. We then determine the gain An essential merit of plasmonic nanolasers is to lower material loss, metallic loss and radiation loss of the plas- the total cavity loss by suppressing radiation loss via the monic nanolaser.
    [Show full text]
  • All-Dielectric Nanolaser
    All-dielectric nanolaser D. G. Baranov,1,2 A. P. Vinogradov,1,2,3 and A. A. Lisyansky4,5,a) 1Moscow Institute of Physics and Technology, 9 Institutskiy per., Dolgoprudny 141700, Russia 2All-Russia Research Institute of Automatics, 22 Sushchevskaya, Moscow 127055, Russia 3Institute for Theoretical and Applied Electromagnetics, 13 Izhorskaya, Moscow 125412, Russia 4Department of Physics, Queens College of the City University of New York, Queens, New York 11367, USA 5The Graduate Center of the City University of New York, New York, New York 10016, USA We demonstrate theoretically that a subwavelength spherical dielectric nanoparticle coated with a gain shell forms a nanolaser. Lasing modes of such a nanolaser are associated with the Mie resonances of the nanoparticle. We establish a general condition for the lasing threshold and show that the use of high refractive index dielectric media allows for lasing with a threshold significantly lower than that for nanolasers incorporating lossy plasmonic metals. A nanolaser is a novel type of quantum device that enables the generation of a coherent electromagnetic field at the subwavelength scale.1-4 In order to localize the electromagnetic field of a laser mode at the nanoscale, one employs surface plasmons instead of photons because the wavelength of a plasmon is shorter than that of a photon at the same frequency. The nanolaser can be several wavelengths in length5 producing a beam of light like a usual laser or be of subwavelength size radiating like a multipole. In the latter case, it is referred to as a spaser.1 Basically, a spaser consists of a plasmonic nanoparticle (NP) coupled to a gain medium pumped by an external energy source.
    [Show full text]
  • Mark Stockman: Evangelist for Plasmonics
    pubs.acs.org/journal/apchd5 Editorial Mark Stockman: Evangelist for Plasmonics Cite This: ACS Photonics 2021, 8, 683−698 Read Online ACCESS Metrics & More Article Recommendations ABSTRACT: Mark Stockman was a founding member and evangelist for the plasmonics field for most of his creative life. He never sought recognition, but fame came to him in a different way. He will be dearly remembered by colleagues and friends as one of the most influential and creative contributors to the science of light from our generation. ■ A SHORT BIOGRAPHY OF PROFESSOR MARK projects involved large groups and implied very long STOCKMAN experimental cycles. He moved to the neighboring Institute of Mark Stockman was born on the 21st of July 1947 in Kharkov, a Automation and Electrometry in Novosibirsk to work on the major cultural, scientific, educational, and industrial center in the fundamentals of nonlinear optics with Sergey Rautian. He mainly Russian-speaking northern Ukraine, a part of the Soviet habilitated in 1989 with a D.Sc. dissertation on nonlinear optical Union at that point in time. His father, Ilya Stockman, was a phenomena in macromolecules. mining engineer by training, who fought in World War II and Around this time, the political regime in the Soviet Union became a highly decorated enlisted officer. After the war, Ilya softened and the Iron Curtain was lifted. In 1990, on the Stockman embraced an academic career and eventually became invitation of Professor Thomas F. George, Mark was permitted to leave Russia with his family to take a research post at the State a Professor at the Dnepropetrovsk Higher Mining School.
    [Show full text]
  • Coherent Emission of Surface Plasmons by An
    Nanophotonics 2020; 9(12): 3965–3975 Research article Dmitry Yu. Fedyanin*, Alexey V. Krasavin, Aleksey V. Arsenin and Anatoly V. Zayats Lasing at the nanoscale: coherent emission of surface plasmons by an electrically driven nanolaser https://doi.org/10.1515/nanoph-2020-0157 photonics, coherent nanospectroscopy, and single- Received February 28, 2020; accepted June 26, 2020; molecule biosensing. published online July 20, 2020 Keywords: integrated nanolaser; plasmonics; surface Abstract: Plasmonics offers a unique opportunity to break plasmon polariton amplification. the diffraction limit of light and bring photonic devices to the nanoscale. As the most prominent example, an inte- grated nanolaser is a key to truly nanoscale photonic cir- 1 Introduction cuits required for optical communication, sensing applications and high-density data storage. Here, we Nanophotonics is ubiquitous in many applications ranging develop a concept of an electrically driven subwavelength from optical interconnects and sensing to high-density data surface-plasmon-polariton nanolaser, which is based on a storage and information processing [1–6]. Particularly, the novel amplification scheme, with all linear dimensions plasmonic approach offers an opportunity to deal with smaller than the operational free-space wavelength λ and a photonic signals at the nanoscale via coupling to the free- mode volume of under λ3/30. The proposed pumping electron oscillations in a metal. It can provide ultracompact approach is based on a double-heterostructure tunneling components for optical interconnects such as modulators, Schottky barrier diode and gives the possibility to reduce photodetectors, waveguides and incoherent and coherent the physical size of the device and ensure in-plane emis- nanoscale optical sources [7–13].
    [Show full text]