WSe₂ Light-Emitting Device Coupled to an h-BN Waveguide

Abstract

Optical information processing using photonic integrated circuits is a key goal in the field of nanophotonics. Extensive research efforts have led to remarkable progress in integrating active and passive device functionalities within one single photonic circuit. Still, to date, one of the central components, i.e., light sources, remain a challenge to be integrated. Here, we focus on a photonic platform that is solely based on two-dimensional materials to enable the integration of electrically contacted optoelectronic devices inside the light-confining dielectric of photonic structures. We combine light-emitting devices, based on exciton recombination in transition metal dichalcogenides, with hexagonal boron nitride photonic waveguides in a single van der Waals heterostructure. Waveguide-coupled light emission is achieved by sandwiching the light-emitting device between two hexagonal boron nitride slabs and patterning the complete van der Waals stack into a photonic structure. Our demonstration of on-chip light generation and waveguiding is a key component for future integrated van der Waals optoelectronics.

In-sensor neuromorphic computing using perovskites and transition metal dichalcogenides

“…TMDs also display strong spin-orbit coupling, resulting in the emergence of spin-valley coupling. This property opens up possibilities for exploiting the freedom valley degree in information processing [107][108][109][110][111][112] and quantum computing [113][114][115][116]. Additionally, TMDs can emit light in the visible range, enabling their use in displays and other optoelectronic devices.…”

Hexagonal Boron Nitride Slab Waveguides for Enhanced Spectroscopy of Encapsulated 2D Materials

“…These processes can have unintentional side effects on the 2D semiconductor and often induce charge doping, strain, and add significant fabrication complexity. Recently, hBN-based waveguides and resonators integrated with TMDs have received some attention, [61][62][63][64][65] presenting a pathway toward guiding light emitted by dark excitons that we explore here. Additionally, evidence has been reported that multilayers of InSe can also emit via an OP transition.…”

An Inverse-Designed Nanophotonic Interface for Excitons in Atomically Thin Materials

“…Encapsulation protects the optically active medium from environmental effects that are most prominent at the exposed surface. Therefore, recent efforts have focused on creating nanophotonic devices by directly etching the encapsulating hBN, which serves a dual purpose: maintaining the excellent optical quality of the atomically thin semiconductor, and providing a resonant photonic structure. − …”