Zeitschrift für Laser, Optik und Photonik

Optical Limiting of CdSe Based Multiphase Polymer Nanocomposite Films

Abstract

Jayesh Koher*

Optical limiting is a nonlinear optical process where the transmission of light decreases with increasing light intensity, protecting sensitive optical devices and human eyes from damage by intense light sources such as lasers. Materials exhibiting optical limiting are of significant interest for applications in optical limiters and sensors. One promising class of materials for this purpose is semiconductor nanocrystals embedded in polymer matrices, particularly Cadmium Selenide (CdSe)-based multiphase polymer nanocomposite films. CdSe nanocrystals are semiconductor quantum dots that have attracted extensive research due to their unique optical properties, including size-tunable bandgaps, high photoluminescence quantum yields, and nonlinear optical responses. These properties arise from the quantum confinement effect, where the electronic and optical properties of the nanocrystals are controlled by their size and shape. CdSe nanocrystals can be synthesized using various methods, such as colloidal synthesis, which allows for precise control over their size and surface chemistry.