We are involved in the research and development of semiconductor quantum and heterostructures for nanoscale electronic and photonic devices. Strained Ge alloy films and self-assembled quantum dots are grown by molecular beam epitaxy, sputtering and PLD deposition for silicon photonic devices. Mid infrared photodetectors and floating gate memory devices have been demonstrated using Ge nanocrystals. Silicon nanowires and heterojunction exhibit emission in the telecommunication wavelength and excellent antireflection characteristics. We demonstrated polarization sensitive ultra-high response photodetectors using single Si nanowire. Plasmonic ZnO nanostructures are being studied for multifunctional UV detectors, gas sensors and nano-generators. Currently we are involved on in the integration of 2D materials (graphene, MoS2 and WS2) on Si platforms for large area photonic devices. CMOS compatible gas sensing devices operated at room temperature are being studied using semiconductor nanostructures.
Major research activities of the group are outlined below:
* MBE growth of SiGe heterostructures, quantum wells and quantum dots
* Ge nanocrystals for light emitters and quantum dot memory devices
* Quantum cascade SiGe structures for THz sources and detectors
* Semiconductor nanostructures for photonic and electronic devices
* Si/Ge nanowires and their heterojunctions including single nanowire devices
* ZnO and other II-VI semiconductor nanostructures for sensing, memory and photonic devices
* 2D materials heterostructures on Si platforms
* Strained layer epitaxial growth of Si1-xGe, Si1-yCy and Si1-x-yGexCy films by MBE, UHVCVD and Solid phase epitaxy.
* Ultra-thin and high-k gate dielectric films on strained-Si and strained SiGe layers
* Ferroelectric thin films for memory and sensing applications
Principal Investigator
- Emergent Phenomena in 2D Heterostructures Department of Science and Technology (DST)
- Emergent Phenomena in 2D Heterostructures Department of Science and Technology
- Technology Vertical - Quantum Materials and Devices Department of Science and Technology (DST)
Co-Principal Investigator
- Development of sensor system to monitor indoor and outdoor air quality Ministry of Electronics and Information Technology
- Development of sensor system to monitor indoor and outdoor air quality Ministry of Electronics and Information Technology
- Structural characterization by Field Emission gun Scanning Electron Microscopy Department of Metallurgical and Materials Engineering
- Structural Characterization by Field Emission gun Scanning Electron Microscopy (for internal users) Department of Metallurgical and Materials Engineering
Ph. D. Students
Animesh Mandal
Area of Research: Optical properties of 2D heterostructures
Deepak Kumar Sahu
Area of Research: Optoelectronic devices
Dhananjoy Pratihar
Area of Research: Semiconducting devices
Papay Pati
Area of Research: Optoelectronic Devices
Santu Kumar Ghosh
Area of Research: Magnetic and semiconducting devices
Saranya Das
Area of Research: 2D materials heterostructures for photonic device applications
Saswata Goswami
Area of Research: 2D materials for energy harvesting
Satayender
Area of Research: Organic Electronics
Sayan Chakraborty
Area of Research: Flexible electronic devices
Subham Saha
Area of Research: Nanoelectronic devices
