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arXiv · 1607.03548

Silicon photonic crystal cavity enhanced second-harmonic generation from monolayer WSe2

Taylor K. Fryett·Kyle L. Seyler·Jiajiu Zheng·Chang-Hua Liu·Xiaodong Xu·Arka Majumdar
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Abstract

Nano-resonator integrated with two-dimensional materials (e.g. transition metal dichalcogenides) have recently emerged as a promising nano-optoelectronic platform. Here we demonstrate resonatorenhanced second-harmonic generation (SHG) in tungsten diselenide using a silicon photonic crystal cavity. By pumping the device with the ultrafast laser pulses near the cavity mode at the telecommunication wavelength, we observe a near visible SHG with a narrow linewidth and near unity linear polarization, originated from the coupling of the pump photon to the cavity mode. The observed SHG is enhanced by factor of ~200 compared to a bare monolayer on silicon. Our results imply the efficacy of cavity integrated monolayer materials for nonlinear optics and the potential of building a silicon-compatible second-order nonlinear integrated photonic platform.

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Taylor K. Fryett, Kyle L. Seyler, Jiajiu Zheng, Chang-Hua Liu, Xiaodong Xu, Arka Majumdar. 2016-07-12. Silicon photonic crystal cavity enhanced second-harmonic generation from monolayer WSe2. https://arxiv.org/abs/1607.03548

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