Prof Joy Mitra
Professor (Physics)
- Low Temperature Scanning tunnelling microscopy (STM) and Spectroscopy (STS): Instrumentation and Applications.
- STM tunnelling induced light emission from metal/semiconductor surfaces: Spatial resolution and spectroscopy.
- Investigating the effect of junction geometry in tuning emission wavelengths, especially extension to the infrared.
- Effect of change in dielectric environment on emission spectra. Application to detection of such change in the nanoscale.
- Application of the technique to enhance chemical identification capabilities of the STM.
- Optical switching in azobenzene molecules probed by STM spectroscopy.
- Finite difference time domain simulations of surface plasmon resonances of plasmonic nanostructures (e.g. STM tip sample junctions, tip enhanced Raman spectroscopy and nanostructured surfaces). Phenomenological modelling of STM light emission.
- Metal – Semiconductor Schottky Junctions (micro to nanoscale)
- Nanoscale Schottky Junctions: fabrication and characterization of Pt nanowires on Si using focused ion beam technique.
- Design and characterization of Pt/Pd–Si/InP Schottky Junction devices for high sensitivity (1 ppm) H2 sensing applications.
- Simulation of electrical transport and temperature dependence in Schottky junction devices.
- Study of ZnO thin films and nanostructures via optical spectroscopy, scanning tunnelling spectroscopy and STMLE.
- Fabrication and characterization of n-type ZnO and p-type polymer based devices for photovoltaic applications.