Nanowerk June 8, 2018
An international team of researchers (Singapore, UK, Saudi Arabia, Germany) fabricated, analyzed and modeled a system consisting of the nano-grooved gold film topped with an atomically thin flake of tungsten selenide. The result was a remarkable 7,000-fold multiplication of second harmonic generation (SHG) by which two photons combine to produce a single photon with double the energy. They were able to combine the advantages of both materials to achieve a flexible, ultra-compact, and efficient device for SHG, with potential applications for optical frequency doubling in nanoscale devices… read more. TECHNICAL ARTICLEÂ
Monolayer two-dimensional transition-metal dichalcogenides (2D TMDCs) exhibit promising characteristics in miniaturized nonlinear optical frequency converters. Credit: ACS Nano, 2018, 12 (2), pp 1859–1867