Dynamic Photochemical and Optoelectronic Control of Photonic Fano Resonances via Monolayer MoS₂ Trions

Abstract

Active tunability of photonic resonances is of great interest for various applications such as optical switching and modulation based on optoelectronic materials. Manipulation of charged excitons in atomically thin transition metal dichalcogenides (TMDCs) like monolayer MoS offers an unexplored route for diverse functionalities in optoelectronic nanodevices. Here, we experimentally demonstrate the dynamic photochemical and optoelectronic control of the photonic crystal Fano resonances by optical and electrical tuning of monolayer MoS refractive index via trions without any chemical treatment. The strong spatial and spectral overlap between the photonic Fano mode and the active MoS monolayer enables efficient modulation of the Fano resonance. Our approach offers new directions for potential applications in the development of optical modulators based on emerging 2D direct band gap semiconductors.

High‐Performance Monolayer MoS2 Films at the Wafer Scale by Two‐Step Growth

“…Therefore, the mutual conversion of light and electrical signal can enable data processing and storage on the sole basis of ML 2D chalcogenides. In fact, besides traditional optoelectronic devices, novel devices that are based on controlling excitons (i.e., exciton flux) have recently been reported . Although such properties of ML chalcogenide have been verified, they may not require exactly the same quality of ML 2D films.…”

A first-principles study of electronic structure and photocatalytic performance of GaN–MX2 (M = Mo, W; X= S, Se) van der Waals heterostructures

“…Monolayer MoS 2 has mobility of 200 cm 2 V À1 s À1 and high on/ off ratio at room temperature, 11 which makes it suitable material for many applications in optoelectronics. 12 Like MoS 2 , when the layers of MoSe 2 is reduced to several are single layer, the nature of band gap (1.1 eV) changes to a direct (1.55 eV). 13 Monolayer MoSe 2 is a semiconductor having high efficiency of photoconversion, which makes it suitable for high-efficiency electronic devices.…”

Wide-range line shape control of Fano-like resonances in all-dielectric multilayer structures based on enhanced light absorption in photochromic waveguide layers

“…44 In exactly the same context as the active control of plasmonic resonances (active plasmonics 45 ) and electric and magnetic resonances in dielectric nanostructures, 46 the active control of the Fano-like, EIT-like, and EIA-like resonances is extremely important to push forward the resonances to real applications, such as optical modulators, switches, and circuits. During the past few years, attempts to control the Fano-like and EIT-like resonances by mechanical stresses, 47 electric fields, [48][49][50] temperature, [51][52][53] and light 41,42,44,[54][55][56] have been reported. However, in spite of the great efforts devoted so far, the active control of the resonances in photonic structures is still at the initial stage, and further experimental and theoretical studies are highly required.…”