Department of Electrical and Computer Engineering, Fitzpatrick Institute for Photonics, Duke University, Durham, North Carolina 27708-0291, USA.
Opt Lett. 2010 Sep 15;35(18):3144-6. doi: 10.1364/OL.35.003144.
The radiation loss in the escaping light cone with a two-dimensional (2D) photonic crystal slab microcavity can be suppressed by means of cladding the low-Q slab microcavity by three-dimensional woodpile photonic crystals with the complete bandgap when the resonance frequency is located inside the complete bandgap. It is confirmed that the hybrid microcavity based on a low-Q, single-defect photonic crystal slab microcavity shows improvement of the Q factor without affecting the mode volume and modal frequency. Whereas 2D slab microcavities exhibit Q saturation with an increase in the number of layers, for the analyzed hybrid microcavities with a small gap between the slab and woodpiles, the Q factor does not saturate.
在共振频率位于完全带隙内时，用具有完全带隙的三维木堆光子晶体覆盖低 Q 值平板微腔，可以抑制具有二维（2D）光子晶体平板微腔的逃逸光锥的辐射损耗。实验证实，基于低 Q 值、单缺陷光子晶体平板微腔的混合微腔在不影响模式体积和模态频率的情况下提高了 Q 值。虽然 2D 平板微腔的 Q 值随层数量的增加而饱和，但对于分析的具有平板和木堆之间小间隙的混合微腔，Q 值不会饱和。
