Study of wavelength-scale photonic crystal lasers = 파장 정도 크기를 가진 광결정 레이저에 관한 연구

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The smallest possible laser has long been a challenging and exciting issue in the laser and quantum optics communities. Owing to advances in semiconductor crystal growth and fabrication techniques, lasing actions in various micrometer-size cavities in solids have been successfully performed. The size of semiconductor micro-lasers has become truly wavelength-scale as witnessed by the demonstration of photonic crystal nano-cavities. Particularly, high-quality photonic crystal cavities down to the wavelength scale offer the distinct possibility of a thresholdless laser and a single photon source. Strong coupling phenomena have also been experimentally observed in photonic crystal cavities containing semiconductor quantum dots. However, a number of issues, such as a fully three-dimensional analysis of light-matter interaction in photonic crystal cavities, an electrically driven lasing operation for a practical device, and spectral and spatial tuning of the resonant modes of the photonic crystal, remain to be addressed before it is possible to practically realize these high-performance optical applications. In this thesis, solutions for the issues are proposed and demonstrated, representing small but meaningful steps toward the ultimate creation of quantum optical devices using wavelength-scale photonic crystal cavities. First, a three-dimensional finite-difference time-domain method that can handle dispersive and dynamic nonlinear-gain media such as semiconductor quantum wells and quantum dots is proposed and realized. The effect of carrier diffusion is included through the formulation of laser rate equations. Through this three-dimensional nonlinear gain FDTD method, rich laser-dynamics behaviors, such as the lasing threshold, the relaxation oscillations, and the spatial hole burning, are directly observed from a hexapole mode. Also examined and measured are interesting characteristics of Rabi splitting between a wavelength-scale PhC cavity mode and a single qua...
Advisors
Lee, Yong-Heeresearcher이용희researcher
Description
한국과학기술원 : 물리학과,
Publisher
한국과학기술원
Issue Date
2009
Identifier
309027/325007  / 020037318
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2009.2, [ v, 135 p. ]

Keywords

photonic crystal; semiconductor lasers; optical micro-cavities; nano-photonics; single photon sources; 광결정; 반도체 레이저; 미세 공진기; 나노 광학; 단광자원

URI
http://hdl.handle.net/10203/47610
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=309027&flag=dissertation
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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