Photonic Materials Technology Section (PMTS)

Photonic & Detector Materials Laboratory (PDML)

Raman spectroscopy being a local probe is extremely sensitive to the material composition, local environment, structure, stress, electron-phonon coupling, crystalline quality, etc., and has become a go-to technique for researchers for obtaining new insights into various bulk (crystalline, polycrystalline, glasses), thin film and nanostructured functional materials. The objective of Raman spectroscopic activity is to use optical micro-spectroscopy to study the optical, electronic, and vibrational properties of functional materials. Currently, the work mainly involves assessing the monolayer/multilayer formation and crystalline quality of nanostructured materials, including 2D materials prepared by exfoliation and chemical vapor deposition, studies on oxide formation in thermally-treated metal thin films, and polarized/unpolarized Raman spectroscopy of different class of photonic and functional materials in different forms. Work towards temperature-dependent Raman spectroscopic investigation of surface oxidation in technologically important metals/alloys is also being explored.