Novel Optoelectronic Properties and Devices Based on Cavity-Integrated 2D Materials
Chang-Hua Liu1,3*, Taylor Fryett2, Sanfeng Wu3, Genevieve Clark4, Xiaodong Xu3, Arka Majumdar4
1Department of Electrical Engineering, National Tsing Hua University, Hsinchu, Taiwan
2Department of Electrical Engineering, University of Washington, Seattle, USA
3Department of Physics, University of Washington, Seattle, USA
4Department of Materials Science and Engineering, University of Washington, Seattle, USA
* Presenter:Chang-Hua Liu, email:chliu@ee.nthu.edu.tw
Developing nanoscale optoelectronic devices is crucial for the next generation information technology or integrated nanophotonic applications. Among different optoelectronic materials, the atomically thin two-dimensional (2D) transition metal dichalcogenides (TMDCs) are considered as the promising candidates due to their direct band gap properties, strong light-matter interactions at atomic limit, and unprecedented material compatibility. Thus far, TMDCs have been utilized to develop diverse atomically-thin optoelectronics, such as photovoltaics, photodetectors and light emitters. However, due to the extreme thinness, their emission or detection are usually not strong enough for practical applications. To address this technical challenging, we integrated 2D devices with photonic nanocavities, which could increase the light-matter interactions via temporal and spatial confinement of light, and demonstrated several new device concepts, including an optically pumped laser, cavity enhanced light-emitting tunneling diode and cavity enhanced second harmonic generation (SHG).


Keywords: Two-dimensional materials, Photonic crystal cavity, Light emitter, Nonlinear optics