Browsing by Author "Fan, Jyun-Hao"

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High quality factor circular photonic crystal microcavity lasers
(2007)
Lu, Tsan-Wen
;
Fan, Jyun-Hao
;
Tsai, Feng-Mao
;
Lee, Po-Tsung
;
光電工程學系
The isotropic photonic bandgap (PBG) with only 6.7% width variation of circular photonic crystal (CPC) is investigated by finite-difference time-domain (FDTD) method. Whispering gallery mode (WGM) is sustained in CPC microcavity from FDTD simulation. The WGM single-mode lasing with low threshold (similar to 0.13 mW) and high quality (Q) factor (> 10000) is obtained from well-fabricated devices.
High quality factor microcavity lasers realized by circular photonic crystal with isotropic photonic band gap effect
(2007-04-09)
Lee, Po-Tsung
;
Lu, Tsan-Wen
;
Fan, Jyun-Hao
;
Tsai, Feng-Mao
;
光電工程學系
The photonic band gap (PBG) effect and its isotropy of sunflower-type circular photonic crystal (CPC) are obtained and investigated from the transmission spectra performed by finite-difference time-domain (FDTD) method. The PBG directional width variation is found to be only 6.7%. A well-confined whispering gallery mode (WGM) with azimuthal number of 6 is obtained by FDTD simulation from the CPC microcavity formed by seven missing air holes (C2). Ascribed to the deep and isotropic PBG confinement, the WGM lasing with very-low threshold (similar to 0.13 mW) and very-high-quality (Q) factor (> 10 000) is obtained from well-fabricated CPC C2 microcavity lasers. (c) 2007 American Institute of Physics.