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1081-專題演講-1080911-呂宥蓉(中研院應科中心)

演講活動
張貼人:李明芳公告日期:2019-09-05
  
Time1080911 (Wed.) 14:20~16:20
SpeakerProf.呂宥蓉(Yu-Jung Lu)
中央研究院應用科學研究中心/Research Center for Applied Sciences, Academia Sinica
TitleControlling Light-matter Interactions at Nanoscale with Plasmonics: From Spontaneous Emission to Lasing
AbstractIn this talk, I will present an overview of my research works in recent five years. My previous works mainly focus on wavelength-tunable on-chip nanoemitters, such as InGaN nano-LEDs and InGaN plasmonic nanolasers [1,2]. Here, I will specifically present my recent work during my 2-years Postdoc research in Caltech. I have developed a research project focusing on Gate Tunable Spontaneous Emission Decay Rate of InP Quantum Dots and Organo-lead Halide Perovskite Nanolasers[3]. I have performed electromagnetic simulations to design gate tunable heterostructures for tuning spontaneous emission from quantum dots, which have been also fabricated and experimentally characterized. The idea is by electrically modulating the titanium nitride (TiN) in the designed plasmonic heterostructure, we demonstrated the field-effect modulated spontaneous emission rate of semiconductor quantum dots due to novel electric-field induced refractive index change mechanism. We demonstrate gate tunable spontaneous emission rate of InP quantum dots (QDs) due to bias induced modification of the local density of optical states (LDOS). The modulation is due to the large change in complex dielectric function at TiN/gate dielectric interface in the bias-induced accumulation/depletion layer. The underlying physics is very promising since by using electric-field induced LDOS modulation, not only bias-induced PL quenching but also bias-induced PL enhancing of semiconductor QDs can be observed. Unlike conventional LED structure which require special doping to make p-n junction or complex growth, this work opens the door towards optoelectronic applications that are simple to implement. This LDOS modulation effect provides an insight in development of tunable on-chip optical light sources for potential future application on electrically driven plasmonic nanolasers, ultracompact on-chip optical information processing, electrical controlled single photon emission, and thin film display.
References
1.Y-J Lu et al. Plasmonic Nanolaser Using Epitaxially Grown Silver Film. Science 337, 450 (2012).
2.Y-J Lu et al. All-Color Plasmonic Nanolasers with Ultralow Thresholds: Auto-tuning Mechanism for Single-Mode Lasing. Nano Lett. 14, 4381(2014).
3.Y-J Lu et al. Tunable Radiative Emission of InP Quantum Dots with Gated TiN/SiO2/Ag Plasmonic Heterostructure. Nature Communications 8, 1631 (2017).
PlaceB102, Gongquan Campuses, NTNU

最後修改時間:2019-09-05 PM 1:58

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單位簡介

本系的重點研究領域包括:凝態物理、光電與奈米科學、高能與粒子物理、軟凝態物理與生物物理、原分子光學物理、及物理科學教育等。本系前身為臺灣省立師範學院理化系物理組,成立於民國三十五年(1946年)本校創校之始。民國五十一年(1962年)本系獨立成系,民國六十三年(1974年)成立物理研究所碩士班,民國八十年(1991年)成立研究所博士班。長久以來,本系肩負著培育臺灣中等學校物理科師資的重任,但也不忘在物理學術研究上求新求進步。至今本系培育出的學術人才已有一位中研院院士及近百位中研院研究員及大學教授,各行各業的高科技人材更是不勝枚舉。民國八十三年師資培育法改制後,本系已升級為尖端學術研究、科技應用研發、及中學師資培育三者齊備的系所。

  • 國立臺灣師範大學物理系系友會
  • 系友會線上小額捐款
  • 徐有庠盃-臺灣青年學生物理辯論競賽
  • 國際物理奧林匹亞競賽
  • BOSON CLUB
  • 公用場地與儀器設施預約系統
  • 學生實習專區
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