Enhanced self-phase modulation in silicon suspended membrane waveguides

Zhang, Yaojing; Cheng, Zhenzhou; Liu, Linghai; Zhu, Bingqing; Wang, Jiaqi; Zhou, Wen; Wu, Xinru; Tsang, Hon Ki

doi:10.1364/acpc.2015.asu4a.2

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2016

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“…The suspended silicon nanowire structures may also give enhancements to optical nonlinearities from radiation pressure and electrostriction [9]. However, there has not yet been any detailed experimental study of self-phase modulation (SPM) in aircladding silicon SMWs except for our recently preliminary work reported in [10].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of self-phase modulation induced spectral broadening in silicon suspended membrane waveguides

Zhang

Cheng

Liu

et al. 2016

J. Opt.

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We experimentally observed a possibly enhanced self-phase modulation (SPM) in silicon suspended membrane waveguides (SMWs) by measuring the spectral broadening of optical pulses. The nonlinear coefficient n2 and the two-photon absorption coefficient β2 of silicon SMWs were measured to be (4.6 ± 0.9) × 10−18 m2 W−1 and 0.46 cm GW−1 at 1555 nm wavelength. We also proposed a method of using SPM-induced spectral broadening to obtain the coupling loss of a single grating coupler and experimentally compared the spectra of two grating couplers in silicon SMWs and in silicon-on-insulator waveguides.

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Section: Introductionmentioning

confidence: 99%