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About Us

Welcome to Prof. Arnab Bhattacharya's Group

The optoelectronic devices that drive today's technological world critically depend on combining various semiconductor materials, typically of different bandgaps. These devices have many layers of materials, ranging from few-atomic layers, to a few µm in thickness.

Semiconductor quantum structures – ultra-thin film, wire, or dot-like configurations of nm size are at the heart of most devices. The growth of different compound semiconductors heterojunctions is a key requirement for devices.

Our lab specializes in the epitaxial growth and characterization of bulk and low-dimensional III-V semiconductors, particularly the III-Nitrides, and their use in device structures.

Our core expertise is in the epitaxial growth of compound semiconductors via a technique called metalorganic vapour phase epitaxy (MOVPE). Our lab has two MOVPE systems, a horizontal reactor for As/P materials and a 3x2” closed-coupled showerhead MOVPE system used mainly for III-Nitrides.

We study the structural, optical and electrical properties of both bulk and low-dimensional III-V semiconductors (quantum wells/ wires/dots) using and have access to a wide range of characterization techniques such as high-resolution XRD, photoluminescence and Raman spectroscopies, and electron microscopy.


MOVPE Reactor

3 x2 " showerhead MOVPE reactor dedicated to grow III-Nitride thin films, quantum well, quantum dots and nanowires.

MOCVD Reactor

Horizontal CVD Reactor for growing III-Arsenides, III-Phosiphides related thin films, quantum well, quantum dots, nanowires.


Panalytical X'Pert MRD system for High Resolution X-ray diffraction measurements of epitaxially grown thin films.

Raman spectroscopy

WiTec alpha 300 confocal Raman spectroscopy to study the vibrational properties of the thin films.

Device processing

Various device processing equipments like Optical and e-beam lithography, ICP-RIE and ICP-CVD.


High Resolution Transmission electron spectrocopy imaging lab to study interface.


  • 2020

    Synthesis and characterization of Cu 3 SbS 4 thin films grown by co-sputtering metal precursors and subsequent sulfurization.
    Rahman AA, Hossian E, Vaishnav H, Parmar JB, Bhattacharya A, Sarma A.
    Materials Advances. 2020;1(9):3333-8.

    Doping controlled Fano resonance in bilayer 1T′-ReS 2: Raman experiments and first-principles theoretical analysis.
    Das S, Prasad S, Chakraborty B, Jariwala B, Shradha S, Muthu DV, Bhattacharya A, Waghmare UV, Sood AK.
    Nanoscale. 2021;13(2):1248-56.

    Recharging and rejuvenation of decontaminated N95 masks
    E Hossain, S Bhadra, H Jain, S Das, A Bhattacharya, S Ghosh, D Levine
    Physics of Fluids. 2020 Sep 1;32(9):093304.

    Temperature-dependence of Cl2/Ar ICP-RIE of polar, semipolar, and nonpolar GaN and AlN following BCl3/Ar breakthrough plasma
    AP Shah, A Azizur Rahman, A Bhattacharya
    JVST A: 2020 Jan 17;38(1):013001.

    Large-area, thermally-sulfurized WS2 thin films: Control of growth direction and use as a substrate for GaN epitaxy
    E Hossain, AA Rahman, AP Shah, B Chalke, A Bhattacharya
    Semiconductor Science and Technology 2020 35, 035011

  • Growth of high-quality GaN on (1 0 0) Ga2O3 substrates by facet-controlled MOVPE
    Emroj Hossain, A Azizur Rahman, Mahesh Gokhale, Ruta Kulkarni, Rajib Mondal, Arumugam Thamizhavel, Arnab Bhattacharya
    Journal of Crystal Growth 2019 524, 125165.

    Laser induced structural phase transitions in Cu3SbS4 thin films
    AA Rahman, E Hossain, H Vaishnav, A Bhattacharya, A Sarma
    Semiconductor Science and Technology 2019 34 (10), 105026.

    Growth, structural and optical characterization of wurtzite GaP nanowires
    Carina B Maliakkal, Mahesh Gokhale, Jayesh Parmar, Rudheer Bapat, Bhagyashree Chalke, Sandip Ghosh, Arnab Bhattacharya
    Nanotechnology 2019 30 254002

    Optimization of Gas Ambient for High Quality β-Ga2O3 Single Crystals Grown by the Optical Floating Zone Technique
    Emroj Hossain, Ruta Kulkarni, Rajib Mondal, Swati Guddolian, A Azizur Rahman, Arumugam Thamizhavel, Arnab Bhattacharya
    ECS Journal of Solid State Science and Technology 8 (7), Q3144-Q3148

Our Team

Maheshwar R Gokhale

Scientific Officer Extn: 2855

Epitaxial growth of III-V materials, HRXRD.

Amit P Shah

Scientific Officer Extn: 2855

Semiconductor device fabrication and processing.

A Azizur Rahman

Scientific Officer Extn: 2517

Growth and characterizatio of III-Nitride in MOVPE reactor.

Maneesha N

Research Scholar Extn: 2517

Ga2O3 single crystal growth and doping studies.

Vishal Suriyanarayanan

Research Scholar Extn: 2517

Structural characterization Ga2O3 single crystals.

Emroj Hossain

Ph.d Alumni Extn: -

GaN on Ga2O3, GaN on WS2, WS2 nanotubes.

Carina B. Maliakkal

Ph.d Alumni Extn:-

Post doctral Researcher in Lund University, Sweden.

Priti Gupta

Ph.d Alumni Extn:-

Guest Research Scientist, Technical University-Berlin.

Bhakti Jariwala

Post doc Alumni Extn:-

Pennsylvania State University, Materials Research Institute. .

Masihhur Laskar

Ph.d Alumni Extn:-

Researcher, University of Wisconsin-Madison, Wisconsin. .

Sajal Dhara

Ph.d Alumni Extn:-

Associate Professor, Indian Institute of Technology- Kharagpur.

Abdul Kadir

Ph.d Alumni Extn:-

Researcher, Singapore-MIT Alliance for Research and Technology (SMART).

Contact Us

Feel free to contact us for Research and other activities.

Prof. Arnab Bhattacharya

Chair, Dept. of Condensed Matter Physics and Material Science
Chair, Science Popularization and Public Outreach

Tata Institute of Fundamental Research
Homi bhabha Road,
Mumbai 400 005