High quality factor microcavity lasers realized by circular photonic crystal with isotropic photonic band gap effect
نویسندگان
چکیده
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 0.13 mW and very-high-quality Q factor 10 000 is obtained from well-fabricated CPC C2 microcavity lasers. © 2007 American Institute of Physics. DOI: 10.1063/1.2724899
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