Executive Summary : | Chiroptical semiconductor nanocrystals rotate the plane of polarization of linearly polarized light. The phenomenon of the rotating the plane of polarization of the incident linearly polarized light beam is called optical activity and can be implemented in achiral semiconductor nanocrystals via chiral organic molecules, chiral assembly, and doping or structural re-arrangements. This enables the semiconductor nanostructure having chirality to detect and emit circularly polarized light, chirality induced spin selectivity, asymmetric catalysis and sensing, and quantum information processing. The direct detection and emission of circularly polarized photons have immense potential to be implemented in machine visions such as smart image sensors for cameras, glare free optical displays in automobiles, smart windows, or smart optoelectronic displays used in augmented reality, chiral drug diagnosis in pharmaceutical industries, optical switches for optical communications. Chiral organic molecules are mostly used as the source of circularly polarized photoluminescence (CPL) emitters but their chiral response are small. On the other side, colloidal semiconductor quantum dots exhibit narrow and high photoluminescence quantum yield. Thus, right choice of semiconductor quantum dot molecule will provide giant optical activity combined with higher quantum yield photoluminescence. Besides, they will allow all optical controlled read out of electron spin state and thus, have huge potential for quantum information processing. Thus, they have future potential for quantum information processing. The primary aims of this research proposal are threefold: (1) Design of chiral semiconductor nanostructures with high photoluminescence quantum yield: The recent development in the field of colloidal perovskite quantum dots with high photoluminescence will be exploited for high luminescenet quantum dots structures with high photoluminescence quantum yield. The structure will be varied in different respect (doping, superstructure, and assembly). (2) Understanding the light-matter interaction in chirally functionalized/induced colloidal nanostructures (CNs) via polarized optical spectroscopy: The circular dichroism spectroscopy and circular polarized photoluminescence spectroscopy provide valuable information to understand the light-matter interactions in chiroptical semiconductor nanocrystals (3) Applications of the chiral semiconductor nanostructures in circularly polarized detectors and optical rotators: Their photo responses will be checked in terms of optical rotational strength, detection strength of polarized photocurrent. |