Year: 2016
Type: article
Abstract: Two-dimensional (2D) atomic crystals and van der Waals heterostructures constitute an emerging platform for developing new functional ultra-thin electronic and optoelectronic materials for novel energy-efficient devices. However, in most thin-film optical applications, there is a long-existing trade-off between the effectiveness of light–matter interactions and the thickness of semiconductor materials, especially when the materials are scaled down to atom thick dimensions. Consequently, enhancement strategies can introduce significant advances to these atomically thick materials and devices. Here we demonstrate enhanced absorption and photoluminescence generation from MoS 2 monolayers coupled with a planar nanocavity. This nanocavity consists of an alumina nanolayer spacer sandwiched between monolayer MoS 2 and an aluminum reflector, and can strongly enhance the light–matter interaction within the MoS 2 , increasing the exclusive absorption of monolayer MoS 2 to nearly 70% at a wavelength of 450 nm. The nanocavity also modifies the spontaneous emission rate, providing an additional design freedom to control the interaction between light and 2D materials.
Source: 2D Materials
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
Funders: National Science Foundation, Pennsylvania State University, U.S. Air Force, Multidisciplinary University Research Initiative, Division of Electrical, Communications and Cyber Systems, Division of Emerging Frontiers in Research and Innovation, Air Force Office of Scientific Research, Army Research Office
Awards: G1339888788, G1523888516, EAGER: Absorption engineering of optical and thermal hyperbolic metafilm patterns, G2749315243, G3049573583, EFRI 2-DARE: Crystalline Atomically Thin Layers for Photonic Applications, G3547100196, High spatial resolution tactile sensing imager using optical exceptional point structures, G4666677386, G4887281111, G539335452, G6071252945, G6482210051, EAGER: Cooperative Spectroscopy for Real-time In Vivo Nano-biosensing: Towards Health-centric Smartphones, G7090116110, G7391891542, G7452299184, G7830320759, G7874353663, G8328062038, G862988727
OpenAlex ID: W2342971533