Yamada Shota, Song Bong-Shik, Upham Jeremy, Asano Takashi, Tanaka Yoshinori, Noda Susumu
Department of Electronic Science and Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
Opt Express. 2012 Jul 2;20(14):14789-96. doi: 10.1364/OE.20.014789.
We show that a SiC photonic crystal cannot only inhibit two photon absorption completely, but also suppress higher-order multiple photon absorption significantly at telecommunication wavelengths, compared to conventional Si-based photonic crystal nanocavities. Resonant spectra of a SiC nanocavity maintain a Lorentzian profile even at input energies 100 times higher than what can be applied to a Si nanocavity without causing nonlinear effects. Theoretical fitting of the results indicates that the four photon absorption coefficient in the SiC nanocavity is less than 2.0 × 10(-5) cm(5)/GW(3). These results will contribute to the development of high-power applications of SiC nanocavities such as harmonic generation, parametric down conversion, and Raman amplification.
