Photonic-crystal vertical-cavity surface-emitting lasers = 광결정 수직 공진 표면광 레이저

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Single-fundamental-mode VCSELs have been attractive research subject due to their potential applications such as data transmission in optical network, optical storage and so on. However, single-transverse-mode operation of VCSELs over an entire operating-current range is difficult to achieve due to spatial hole burning and thermal lensing. In this dissertation, we report the single-fundamental-mode operation of "photoniccrystal VCSELs" (PC-VCSELs). The PC-VCSELs are similar to standard VCSELs except that they have photonic crystal defined by air holes in the top mirror region. The two-dimensional triangular-lattice photonic crystal structure has a single defect. By introducing the single-defect photonic crystal to the VCSEL, a waveguide is expected to be formed around the central defect region where the effective index is larger than the surrounding region. We apply the "effective index model" to the PC-VCSEL to understand the guiding structure of the PC-VCSEL. For efficient current injection, oxide or implant aperture is used. The PC-VCSELs show single fundamental mode through the entire current range with side mode suppression ratio over 35dB. Besides, the PC-VCSELs of asymmetric air holes result in polarization pinning. In this work, the modes of the PC-VCSEL are calculated using 3-dimmensional finite-difference time-domain method. Using the simulation results the polarization pinning is explained. This dissertation contains all of the aspects of the design, processing and experimental results of the PC-VCSEL.
Advisors
Lee, Yong-Heeresearcher이용희researcher
Description
한국과학기술원 : 물리학과,
Publisher
한국과학기술원
Issue Date
2002
Identifier
177209/325007 / 000985183
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2002.8, [ iii, 123 p. ]

Keywords

single mode; vertical-cavity surface-emitting laser; photonic crystal; polarization control; 편광 제어; 단일 모드; 수직공진 표면광 레이저; 광결정

URI
http://hdl.handle.net/10203/47302
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=177209&flag=dissertation
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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