Special Seminar
Name: Dr. Mukesh Jewariya
Affiliation: Principal Scientist, National Physical Laboratory-New Delhi
Title: Terahertz Computed Tomography and its Prospectus
Date & Time: Thursday, 18th September 2025 at 12:00 p.m.
Venue: Rajarshi Bhattacharyya Memorial Lecture Hall, Chemical Sciences Building
Abstract:
A novel technique has been demonstrated for the generation of intense terahertz electromagnetic wave that enables high-field near-single-cycle terahertz (THz) pulse via non-collinear χ(2) process in LiNbO3 with both phase-front and spectral angular dispersion. Using this technique we are able to generate a single cycle (broadband) terahertz pulse upto an electric field of 750kV/cm
We have also demonstrated the potential of this intense THz pulse for 3D THz imaging, which is 13- times higher than that of previous system based on collinear optical rectification in ZnTe crystal. The main advantage of the proposed method relies on real-time THz line projection providing 10 ms acquisition time of 2D-ST THz image. Therefore, 3D THz CT has been performed in only 6 minutes, representing a significant improvement compared with common systems. Finally, demonstration of 3D images clearly indicated a high potential for sensing, non-destructive inspection and material characterization in real world applications.