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Chinese Physics B 2022年第11期31卷 599-604页

作者：王刘丽顾阳陈怡静倪亚贤董雯 School of Physical Science and Technology Soochow UniversitySuzhou 215006China Soochow College Soochow UniversitySuzhou 215006China

Circular dichroism(CD)has shown very interesting possibilities as a means to characterize the chiral signal of a chiral structure.Here,we theoretically demonstrated enhanced and tunable CD in the visible light regime using a composite structure consisting of a double-layer metal grating gaped by a dielectric waveguide layer.Based on the coupling of the waveguide modes and the localized plasmonic resonances,the CD could reach a maximum value as high as 0.52 at635 nm,which is four times higher than the CD value obtained in a conventional double-layer grating without the waveguide coupling effect.Furthermore,the spectral positions of the enhanced CD bands could be easily tuned by controlling the structural parameters.The proposed hybrid double-grating and waveguide structures could have potential applications in chiral selective imaging,sensing and spectroscopy,especially where the transmission measurement is required.

关键词： circular dichroism chiral metamaterial waveguide surface plasmon

surface plasmon wave propagation along single metal wire

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Chinese Physics B 2012年第11期21卷 393-401页

作者：钟任斌刘维浩周俊刘盛纲 Terahertz Science and Technology Research Centre University of Electronic Science and Technology of China

Recently, the single metal wire （SW） has become attractive for its potential applications in the terahertz and higher frequency range. However, as the most simple and typical surface plasmon polariton （SPP） transmission line, its study seems far from enough. Many important transmission behaviours have not been explained satisfactorily from the viewpoint of physics. In this paper, making use of the modified Drude model （MDM） based on the Sommerfeld theory, the transmission behaviours of SPPs along SW are systemically investigated theoretically. Some important physical phenomena such as the mode transformation, the lifetime of the radiative mode and the resonance frequency are revealed, and their mechanisms are explored. The results obtained in the paper will facilitate a general understanding of the features and the physical essence of the SPP transmission, not only for SW itself but also for other SPP transmission lines.

关键词： surface plasmon single metal wire wave propagation

surface-plasmon-enhanced light transmission intensity with a basic grating in GaNbased LED

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Journal of Semiconductors 2014年第4期35卷 42-47页

作者：李林青吕燕伍 Department of Physics Beijing Jiaotong University

The transmitting light in GaN-based LED with 30 nm thickness metal film grating is investigated. We proposed a basic grating structure model to enhance light intensity in GaN material, which was simpler and cheaper. We calculated and analyzed the structure with different parameters, and studied the numerical simulation results of Ag-films/Al-films/Au-films. With a simple A1 or Ag basic grating structure, the 7.4-7.6 times intensity of 550 nm light can be obtained easily, and the enhancement efficiency is better than others.

关键词： GaN-based LED surface plasmon metal grating structure

surface plasmon resonance transmission filters at 1053 nm based on metallic grating with narrow slit

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Chinese Physics B 2009年第3期18卷 1029-1032页

作者：麻健勇许程刘世杰张大伟晋云霞范正修邵建达 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Graduate school of Chinese Academy of Sciences

Metallic gratings with narrow slits can lead to special optical properties such as strongly enhancing the trans- mission and considerably strengthening the polarized effect. A narrow-band filter suitable for application in optical communication is designed by sandwiching a metallic grating between two identical dielectric films. The maximum transmission can reach 96% after optimizing the parameters of films and grating at a central wavelength of 1053 nm. It is the first time, to our knowledge, that such high transmission has been reported since the discovery of the extraordinarily high transmission through periodic holes or slits; moreover, the extremely polarized effect is also found in P mode of this symmetric grating.

关键词： metallic grating surface plasmon extraordinary transmission

A historical overview of nano-optics:From near-field optics to plasmonics

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Chinese Physics B 2024年第5期33卷 134-145页

作者：邓妙怡朱星 Department of History of Science Technology and MedicineAcademy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China School of Physics Peking UniversityBeijing 100871China

Nano-optics is an emergent research field in physics that appeared in the 1980s,which deals with light–matter optical interactions at the nanometer scale.In early studies of nano-optics,the main concern focus is to obtain higher optical resolution over the diffraction limit.The researches of near-field imaging and spectroscopy based on scanning near-field optical microscopy(SNOM)are developed.The exploration of improving SNOM probe for near-field detection leads to the emergence of surface plasmons.In the sense of resolution and wider application,there has been a significant transition from seeking higher resolution microscopy to plasmonic near-field modulations in the nano-optics community during the nano-optic development.Nowadays,studies of nano-optics prefer the investigation of plasmonics in different material systems.In this article,the history of the development of near-field optics is briefly reviewed.The difficulties of conventional SNOM to achieve higher resolution are discussed.As an alternative solution,surface plasmons have shown the advantages of higher resolution,wider application,and flexible nano-optical modulation for new devices.The typical studies in different periods are introduced and characteristics of nano-optics in each stage are analyzed.In this way,the evolution progress from near-field optics to plasmonics of nano-optics research is presented.The future development of nano-optics is discussed then.

关键词： nano-optics near-field optics surface plasmon plasmonic modulation

Position-dependent property of resonant dipole-dipole interaction mediated by localized surface plasmon of an Ag nanosphere

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Chinese Physics B 2015年第2期24卷 158-164页

作者：许丹王小云黄勇刚欧阳仕粮何海龙何浩 College of Physics Mechanical and Electrical EngineeringJishou University

We use the photon Green-function method to study the quantum resonant dipole-dipole interaction（RDDI） induced by an Ag nanosphere（ANP）.As the distance between the two dipoles increases,the RDDI becomes weaker,which is accompanied by the influence of the higher-order mode of the ANP on RDDI declining more quickly than that of the dipole mode.Across a broad frequency range（above 0.05 eV）,the transfer rate of the RDDI is nearly constant since the two dipoles are fixed at the proper position.In addition,this phenomenon still exists for slightly different radius of the ANPs.We find that the frequency corresponding to the maximum transfer rate of RDDI exhibits a monotonic decrease by moving away one dipole as the other dipole and the ANP are kept fixed.In addition,the radius of ANP has little effect on this.When the two dipoles are far from the ANP,the maximum transfer rate of the RDDI takes place at the frequency of the dipole mode.In contrast,when the two dipoles are close to the ANP,the higher-order modes come into effect and they will play a leading role in the RDDI if they match the transition frequency of the dipole.Our results may be used in a biological detector and have a certain guiding significance for further application.

关键词： quantum resonant dipole-dipole interaction photonic Green function surface plasmon

Enhanced photon emission by field emission resonances and local surface plasmon in tunneling junction

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Chinese Physics B 2022年第11期31卷 455-459页

作者：李健梅郝东孙丽欢唐向前安旸单欣岩陆兴华 Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Center for Excellence in Topological Quantum Computation Beijing 100190China Songshan Lake Laboratory for Materials Laboratory Dongguan 523808China

We investigated the photon emission spectra on Ag(111)surface excited by tunneling electrons using a low temperature scanning tunneling microscope in ultrahigh vacuum.Characteristic plasmon modes were illustrated as a function of the bias voltage.The one electron excitation process was revealed by the linear relationship between the luminescence intensity and the tunneling current.Luminescence enhancement is observed in the tunneling regime for the relatively high bias voltages,as well as at the field emission resonance with bias voltage increased up to 9 V.Presence of a silver(Ag)nanoparticle in the tunneling junction results in an abnormally strong photon emission at the high field emission resonances,which is explained by the further enhancement due to coupling between the localized surface plasmon and the vacuum.The results are of potential value for applications where ultimate enhancement of photon emission is desired.

关键词： scanning tunneling microscopy luminescence surface plasmon field emission resonance

Enhancement of ZnO ultraviolet emission by surface plasmon coupling using a rough NiSi_2 layer synthesized by ion implantation

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Journal of Semiconductors 2011年第10期32卷 10-13页

作者：谭海仁游经碧张曙光高红丽尹志岗白一鸣张秀兰张兴旺屈盛 Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of Sciences Eoplly New Energy Technology Co.Ltd.

The calculation results of the surface plasmon(SP) energy and Purcell factor of ZnO/NiSi2demonstrate the possibility of using NiSi2to enhance the UV emission of ZnO by SP coupling.Experimentally,ZnO films were deposited on NiSi2layers synthesized by ion implantation,and the roughness of the NiSi2layers spans a large range from 3 to 38 nm,providing favorable conditions for investigating SP-mediated emission.An 11-fold emission enhancement from the ZnO film on the roughest NiSi2layer was obtained,which indicates the possibility that metal silicide layers can be used both as an electrical contact and for emission enhancement.

关键词： ZnO film surface plasmon NiSi2 photoluminescence

Terahertz radiation from interaction between an electron beam and a planar surface plasmon structure

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Chinese Physics B 2009年第9期18卷 3877-3882页

作者：胡旻张雅鑫鄢扬钟任斌刘盛纲 Terahertz Research Centre School of Physical ElectronicsUniversity of Electronic Science and Technology of China

The possibility of an electron beam exciting surface plasmons in conducting metal is discussed in this paper. A planar perfect-structure with subwavelength holes is proposed. The phenomenon that mimicking surface plasmon waves can be excited and amplified by an electron beam is proved theoretically and numerically. The mechanism of transmission through a subwavelength hole array is exploited to enhance the interaction between the electron beam and the mimicking surface plasmons.

关键词： surface plasmon electron beam

Effect of surface plasmon coupling with radiating dipole on the polarization characteristics of AlGaN-based light-emitting diodes

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Chinese Physics B 2022年第7期31卷 573-578页

作者：李毅葛梅王美玉朱友华郭兴龙 School of Information Science and Technology&Tongke School of Microelectronics Nantong UniversityNantong 226019China

The optical polarization characteristics of surface plasmon(SP)coupled Al Ga N-based light emitting diodes(LEDs)are investigated theoretically by analyzing the radiation recombination process and scattering process respectively.For the Al_(0.5)Ga_(0.5)N/Al/Al_(2)O_(3)slab structure,the relative intensity of TE-polarized and TM-polarized spontaneous emission(SE)rate into the SP mode obviously depends on the thickness of the Al layer.The calculation results show that TM dominated emission will be transformed into TE dominated emission with the decrease of the Al thickness,while the emission intensities of both TE/TM polarizations will decrease significantly.In addition,compared with TM polarized emission,TE polarized emission is easier to be extracted by SP coupling.For the Al_(0.5)Ga_(0.5)N/Al nano-particle structure,the ratio of transmittance for TE/TM polarized emission can reach~3.06,while for the Al free structure,it is only 1.2.Thus,the degree of polarization of SP coupled LED can be improved by the reasonable structural design.

关键词： surface plasmon AlGaN-based light emitting diodes FDTD K-P method