DEPARTMENT OF ELECTRONICS AND COMMUNICATION
INDIAN INSTITUTE OF TECHNOLOGY ROORKEE
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Ashish Kumar Chowdhary
Assistant Professor
ashish.chowdhary[at]ece.iitr.ac.in
01332285240
https://akcnitdgp.wixsite.com/dr-ashish-chowdhary
Research Interests

Biosketch
Educational Details
Professional Background

Research
Projects
Publications
Patents
Books
Collaborations

Honours and Awards
Honors
Memberships

Teaching Engagements
Teaching Engagements

Students
Supervisions
Associate Scholars

Miscellaneous
Events
Visits
Administrative Positions
Miscellaneous
Research Interests
Emerging areas of Nanophotonics, Metamaterials, Terahertz Sensing, Terahertz Communication, AI/ML Techniques for above verticals
BioSketch
Educational Details
National Institute of Technology Durgapur, Durgapur, West Bengal, India
2015
B. Tech, Electronics and Communication Engineering [Distinction]
Indian Institute of Technology Guwahati, Guwahati, Assam, India
2022
PhD, Electronics and Electrical Engineering [Best Thesis Award]
Indian Institute of Technology Guwahati, Guwahati, Assam, India
2020
MS (Engineering), Microelectronics, Photonics, and RF Engineering [Best Thesis Award]
Professional Background
Assistant Professor
28 Jun 2023 - Present
Indian Institute of Technology Roorkee, Roorkee, Uttarakhand, India
Post Doctoral Fellow
16 Dec 2022 - 14 Jun 2023
Nanyang Technological University Singapore, Singapore
Teaching Assistant
20 Jul 2017 - 17 Jun 2022
Indian Institute of Technology Guwahati, Guwahati, Assam, India
Integration Engineer
02 Nov 2015 - 14 Jul 2017
Ericsson India Global Services, Kolkata, West Bengal, India
Research
Projects
TOPIC START DATE FIELD DESCRIPTION FINANCIAL OUTLAY FUNDING AGENCY OTHER OFFICERS
Metamaterial based Terahertz Filters for passive remote sensing application 10 Jul 2025 Metamaterials and Terahertz Technologies 31 Lakhs Indian Space Research Organization (ISRO), India
Tailoring Broadband Metamaterial Absorbers for Ultra-High Resolution Imaging at Terahertz Frequencies 04 Jun 2025 Metamaterials and Terahertz Technologies 71 Lakhs Anusandhan National Research Foundation (ANRF), India
Engineering Thermal Emitters for Next-Generation All-day Radiative Cooling 28 Mar 2025 Nano-optics and Metamaterials 61 Lakhs Anusandhan National Research Foundation (ANRF), India
Design of optical filters and absorbers for solar energy harvesting 14 Aug 2024 Nano-optics and Metamaterials 20 Lakhs Indian Institute of Technology Roorkee, India




Publications
Design of tunable metasurfaces for ultra-broadband absorption in terahertz imaging applications
2025
S. Vincent and A. K. Chowdhary* | IOP
Journal: Journal of Physics D: Applied Physics Pages: 335101 , Volumes: 58 ,
Polarization- and Angle-insensitive Tunable Metasurface for Electro-Optic Modulation
2023
T. Bhowmik, A. K. Chowdhary, and D. Sikdar | IEEE
Journal: IEEE Photonics Technology Letters
Infrared-blocking Plasmonic Meta-glasses for Energy-saving Passive Windows
2022
A. K. Chowdhary, T. Bhowmik, and D. Sikdar | OSA
Journal: Optics Letters Pages: 2242–2245 , Volumes: 47 ,
Tunable Terahertz Absorption Modulation in Graphene Nanoribbon-assisted Dielectric Metamaterial
2022
KM Dhriti, A. K. Chowdhary, B. S. Chouhan, D. Sikdar, and G. Kumar | IOP
Journal: Journal of Physics D: Applied Physics Pages: 285101 , Volumes: 55 (28) ,
Grating-assisted Polarization-insensitive Dual-Mode Spatial Light Modulators using an Epsilon-Near-Zero Material
2022
T. Bhowmik, A. K. Chowdhary, and D. Sikdar | IEEE
Journal: IEEE Journal of Quantum Electronics Pages: 1–8 , Volumes: 58 (4) ,
Nanophotonics-enabled High-efficiency Selective Solar Absorbers for Waste Heat Management
2022
A. K. Chowdhary, V. A. Reddy, and D. Sikdar | IEEE
Journal: IEEE Transactions on Nanotechnology Pages: 131–136 , Volumes: 21 ,
Multilayer thin-film based nanophotonic windows: static versus electrotunable design
2022
A. K. Chowdhary, and D. Sikdar | IOP
Journal: Journal of Optics Pages: 024002 , Volumes: 24 ,
Selective Thermal Emitters for High-performance All-day Radiative Cooling
2022
A. K. Chowdhary, V. A. Reddy, and D. Sikdar | IOP
Journal: Journal of Physics D: Applied Physics Pages: 085504 , Volumes: 55 (8) ,
Design of Electrotunable All-weather Smart Windows
2021
A. K. Chowdhary and D. Sikdar | Elsevier
Journal: Solar Energy Materials and Solar Cells Pages: 110921 , Volumes: 222 ,
Energy-saving All-weather Window Based on Selective Filtering of Solar Spectral Radiation
2021
A. K. Chowdhary, T. Bhowmik, J. Gupta, and D. Sikdar | OSA
Journal: Applied Optics Pages: 1315–1325 , Volumes: 60 (5) ,
Polarization- and Angle-insensitive Ultra-broadband Perfect Metamaterial Absorber for Thermophotovoltaics
2021
A. K. Chowdhary, T. Bhowmik, and D. Sikdar | OSA
Journal: Journal of the Optical Society of America B Pages: 327–335 , Volumes: 38 (2) ,
Low-power Design of Electrotunable Color Filters and Optical Switches
2020
A. K. Chowdhary and D. Sikdar | OSA
Journal: Journal of the Optical Society of America B Pages: 3865–3873 , Volumes: 37 ,
Collaborations
Prof. Ranjan Singh
Department of Electrical Engineering, NTU Singapore & University of Notre Dame, United States Of America
Prof. Saurabh Mani Tripathi
Center for Optics and Photonics, Indian Institute of Technology Delhi, India
Dr. Debabrata Sikdar
Department of Electronics & Electrical Engineering, Indian Institute of Technology Guwahati, India
Dr. Sachin Kumar Srivastava
Department of Physics, Indian Institute of Technology Roorkee
Prof. Gagan Kumar
Department of Physics, Indian Institute of Technology Ropar, India
Dr. Sachin Tyagi
CSIR- Central Scientific Instruments Organisation, Chandigarh, India
Dr. Abhishek Kumar
Jawaharlal Nehru Centre For Advanced Scientific Research, Bengaluru
Dr. Manoj Gupta
Department of Electrical Engineering, Indian Institute of Technology Jodhpur, India
Honors And Awards
Honors
Anusandhan National Research Foundation (ANRF), India
2025
Prime Minister Early Career Research Grant 2025
Nanyang Technological University Singapore, Singapore
2023
Post-Doctoral Fellowship
Indian Institute of Technology Guwahati, India
2022
Best Thesis Award Medal
Department of Science and Technology, Government of India, India
2022
AWSAR Award 2021
Conference on Lasers and Electro-Optics, United States Of America
2021
Incubic Milton Chang Travel Grant
International Congress on Artificial Materials for Novel Wave Phenomena - Metamaterials 2021, United States Of America
2021
Student Delegate Grant
Conference on Lasers and Electro-Optics, United States Of America
2021
Best Poster Award
Indian Institute of Technology Guwahati, India
2021
International Media coverage of research work on ‘smart windows’ and ‘radiative cooling’
MemberShips
IEEE, United States Of America
31 Mar 2019 - Present
Member
Optica, United States Of America
05 May 2020 - Present
Member
Teaching Engagements
Teaching Engagements
Terahertz Electronics ( ECN 503 )
Autumn
Terahertz Sensing and Imaging ( ECL 508 )
Spring
High Frequency Measurements & Instrumentation ( ECN-504 )
Spring
Fundamentals of Electronics ( ECE-101 )
Autumn
Industry-Oriented Terahertz Lab ( ECL 564 )
Spring
Training Seminar ( ECN 499 )
Autumn
Terahertz Design Lab - II ( ECN 502 )
Spring
Microwave Lab ( ECN 530 )
Autumn
Students
SuperVisions
Metamaterial based Terahertz Filters for passive remote sensing application, India
20 Jul 2024 - 30 Jun 2029
Other Supervisors: , Scholar: Ranjit Kumar Vishwakarma
Engineering Thermal Emitters for Next-Generation All-day Radiative Cooling, India
15 Jul 2025 - 30 Jun 2030
Other Supervisors: , Scholar: Subhadeep Mukherjee
Tailoring Broadband Metamaterial Absorbers for Ultra-High Resolution Imaging at Terahertz Frequencies, India
15 Jul 2025 - 30 Jun 2030
Other Supervisors: , Scholar: Manoj Sarkar
Miscellaneous
Administrative Positions
Wellness Center Faculty Representative
01 Jan 2025 - Present
IIT Roorkee, India
Member of the Institute Ragging Committee
15 Jul 2024 - 30 Jun 2025
IIT Roorkee, India
Member of Library Committee
01 Jan 2025 - Present
ECE, IIT Roorkee, India
Member of DAPC
28 Jun 2023 - 31 Dec 2024
ECE, IIT Roorkee, India
B.Tech Project Coordinator
28 Jun 2023 - 31 Dec 2024
Dept. of ECE, IIT Roorkee, India
In-charge of Wilson Innovation Lab
28 Jun 2023 - 31 Dec 2024
IIT Roorkee, Roorkee, Uttarakhand, India