All鄄optical thermal modulator based on MoS2/WSe2-PVA thin film 渊invited冤

Abstract

All鄄optical modulator plays an important role for various all鄄optical applications in optical communication. An all鄄optical modulator was mainly investigated based on few鄄layer molybdenum disulfide (MoS2)-polyvinyl alcohol (PVA) thin films. In addition, an all鄄optical modulator based on few鄄 layer tungsten disulfide (WSe2)-polyvinyl alcohol (PVA) thin film was also demonstrated. The modulator was based on polarization interference and the thermo鄄optic effect of TMDs-PVA thin film. A long鄄time stable modulated output was obtained. By absorbing the pump at 980 nm, MoS2 or WSe2 generates heat, changes the refractive index of thin film and modifies the polarization of the incident light at 1 550 nm. The obtained thermal all鄄optical modulator based on MoS2-PVA thin film has a rise time of 526 滋s.