Abstract
Abstract Monolayer transition metal dichalcogenides (TMDs) have emerged as a promising platform for chip-integrated optoelectronics and non-linear optics. Here, we demonstrate a two-dimensional (2D) monolayer tungsten disulfide (WS2) efficiently coupled to a dielectric circular Bragg resonator (CBR). The coupling of the WS2 and CBR leads to pronounced enhancements in both photoluminescence (PL) and second harmonic generation (SHG) by a factor of 34 and 5, respectively. Our work provides a powerful tool to enhance the interactions between light and the 2D materials, paving the way for efficient on-chip optoelectronic devices.
Highlights
The monolayer transition metal dichalcogenides (TMDs) [1,2,3,4,5], such as MoS2, MoSe2, tungsten disulfide (WS2) and WSe2, are emerging platforms to study light–matter interaction at nanoscale
The coupling of the WS2 and circular Bragg resonator (CBR) leads to pronounced enhancements in both photoluminescence (PL) and second harmonic generation (SHG) by a factor of 34 and 5, respectively
Our work provides a powerful tool to enhance the interactions between light and the 2D materials, paving the way for efficient on-chip optoelectronic devices
Summary
The monolayer transition metal dichalcogenides (TMDs) [1,2,3,4,5], such as MoS2, MoSe2, tungsten disulfide (WS2) and WSe2, are emerging platforms to study light–matter interaction at nanoscale. A recent study on WS2 has revealed large second-order nonlinear susceptibility due to the lack of central-symmetry [13, 14]. The performances of atomically thin TMDs as light-emitting devices and non-linear optical materials are significantly limited by the weak light–matter interaction due to their atomic thickness. We demonstrate a monolayer WS2 coupled to a silicon nitride (SiN) CBR. This hybrid system simultaneously experiences pronounced enhancements of both photoluminescence (PL) and second harmonic generation (SHG) at the CBR resonance when injecting low-power of green laser and high-power of near infrared laser, respectively. This work may offer a viable solution of building compact and efficient linear and nonlinear optoelectronic devices by the fusion between 2D material of integrated photonic devices
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