Silicon photonic crystal cavity enhanced second-harmonic generation from monolayer WSe2
Silicon photonic crystal cavity enhanced second-harmonic generation from monolayer WSe2
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DOI：
10.1088/2053-1583/4/1/015031
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发表时间：
2017-03-01
期刊：
影响因子：
5.5
通讯作者：
Majumdar, Arka
中科院分区：
文献类型：
--
作者：
Fryett, Taylor K.;Seyler, Kyle L.;Majumdar, Arka
纳米谐振器与二维材料（如过渡金属二硫属化物）集成最近出现作为一个有前途的纳米光电平台。在这里，我们展示了共振增强二硒化钨二次谐波产生（SHG）使用硅光子晶体腔。通过在通信波长的腔模附近用超快激光脉冲泵浦该器件，我们观察到了一个具有窄线宽和近单位线偏振的近可见倍频，起源于泵浦光子与腔模的耦合。所观察到的SHG增强的因素类似于200相比，在硅上的裸露的单层。我们的研究结果表明，腔集成单层材料的非线性光学和潜在的硅兼容的二阶非线性集成光子平台的建设的有效性。
Nano-resonators integrated with two-dimensional materials (e.g. transition metal dichalcogenides) have recently emerged as a promising nano-optoelectronic platform. Here we demonstrate resonator-enhanced second-harmonic generation (SHG) in tungsten diselenide using a silicon photonic crystal cavity. By pumping the device with 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 similar to 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.