title: Suppression of multiple photon absorption in a SiC photonic crystal nanocavity operating at 1.55 μm.
abstract: 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.
authors: Department of Electronic Science and Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan.
authors: Shota
authors: S
authors: Yamada
authors: Bong-Shik
authors: BS
authors: Song
authors: Jeremy
authors: J
authors: Upham
authors: Takashi
authors: T
authors: Asano
authors: Yoshinori
authors: Y
authors: Tanaka
authors: Susumu
authors: S
authors: Noda