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작성일 : 17-10-27 09:25
2017년 11월 1일 콜로키움
 글쓴이 : 응용물리학과
조회 : 179  
11/1(수) 콜로키움 공지입니다.
학부생들의 많은 참여 바랍니다.
 
강사 : 김명기 교수(고려대학교 KU-KIST 융합대학원)
일시 : 2017.11.1(수) 오후 4시 30분
장소 : 응용과학대학관 211-1호 첨단강의실
 
Title:      
 
Beyond the Diffraction Limit of Light
 
Abstract:
 

Confining light in the smallest possible volume has long been an objective of the nanophotonics community. It offers notable three major advantages; 1) improving spatial resolution of optical system - it enables high-resolution optical imaging, high-precision optical lithography, and high-density/high-capacity optical storage system, 2) improving the performances of optical communication devices - integration density, modulation speed, and energy efficiency are critically improved by miniaturization of optical devices, and 3) increasing the intensity (or the energy density) of light - high-intensity light is utilized in various fields, such as medical, military, and basic science and technology. Despite many advantages, however, it is physically forbidden to confine light in a sub-wavelength space due to the diffraction limit of light.
 
Recent advances in plasmonics have provided a promising route to overcoming the diffraction limit of optical devices by utilizing surface plasmon polaritons (SPPs), which enables us to confine electromagnetic energy within a sub-wavelength scale. It has taken one step towards realizing various future optical devices, such as nano-scale high-speed optical emitters, detectors and modulators, single-molecule spectroscopy, super-resolution optical imaging, and efficient single photon sources. In this talk, recent photonic devices near the diffraction limit and plasmonic devices beyond the diffraction limit are both presented. Especially, microfiber-coupled photonic crystal resonators and highly efficient plasmonic nanofocusing devices are focused.