Terahertz (THz) Spectroscopy Development With Applications to Metamaterials Studies Using Far-Field and Near-Field Techniques

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Terahertz (THz) spectroscopy offers large opportunities in the study of natural as well as artificial materials of various kinds. We have developed several Terahertz (THz) spectroscopic techniques to study different materials, from single crystals to metamaterials. We have developed different new designs for the THz sources. We will briefly mention those.  We studied THz optical properties of t-Se, Bi2Se3, and Vanadium doped [100] β-Ga2O3 using Terahertz Time-Domain Spectroscopy (THz-TDS). β-Ga2O3 is a very popular material with a lot of applications in power electronics etc. Its birefringence behaviour was measured using the THz Time-Domain Polarimetry (THz-TDP) technique. We have also studied Metamaterials of different types for different applications. Many of the applications require us to design these materials on a computer first using COMSOL(R)-like software and then fabricate these. We will mention some of these Metamaterials fabricated and studied by us using THz TDS. Polarization-dependent transmission through an array of subwavelength apertures can have potential applications in channel multiplexing for wireless communication. Specifically, in the sub-Tera-Hertz frequency range (~0.09-0.3THz), such metasurfaces can be deployed as Intelligent Transmitting Surface (ITS) for 6th Generation (6G) short-range communication. We studied THz transmission through such surfaces. We developed a near-field scanning THz Microscope for this purpose. Several interesting Metamaterials were studied using this unique THz Microscope of its kind. These results will be discussed in the talk.


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  • Committee Room
  • IIT (BHU), Varanasi
  • Varanasi, Uttar Pradesh
  • India 221005
  • Building: Department of Electronics Engineering
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Prof. Shriganesh Prabhu

Topic:

THz Spectroscopy Development With Applications to Metamaterials Studies Using Far-Field and Near-Field Techniques

Terahertz (THz) spectroscopy offers large opportunities in the study of natural as well as artificial materials of various kinds. We have developed several Terahertz (THz) spectroscopic techniques to study different materials, from single crystals to metamaterials. We have developed different new designs for the THz sources. We will briefly mention those.  We studied THz optical properties of t-Se, Bi2Se3, and Vanadium doped [100] β-Ga2O3 using Terahertz Time-Domain Spectroscopy (THz-TDS). β-Ga2O3 is a very popular material with a lot of applications in power electronics etc. Its birefringence behaviour was measured using the THz Time-Domain Polarimetry (THz-TDP) technique. We have also studied Metamaterials of different types for different applications. Many of the applications require us to design these materials on a computer first using COMSOL(R)-like software and then fabricate these. We will mention some of these Metamaterials fabricated and studied by us using THz TDS. Polarization-dependent transmission through an array of subwavelength apertures can have potential applications in channel multiplexing for wireless communication. Specifically, in the sub-Tera-Hertz frequency range (~0.09-0.3THz), such metasurfaces can be deployed as Intelligent Transmitting Surface (ITS) for 6th Generation (6G) short-range communication. We studied THz transmission through such surfaces. We developed a near-field scanning THz Microscope for this purpose. Several interesting Metamaterials were studied using this unique THz Microscope of its kind. These results will be discussed in the talk.

Biography:

Prof. S.S. Prabhu holds a Ph.D. in Physics from TIFR and currently serves as a Professor of Physics. His research focus encompasses a wide range of areas, including Ultrafast Time-resolved Phenomena in Materials, THz Spectroscopy of Materials, Metamaterials, High-field THz research, and near-field THz Microscopy. He has more than 81 papers in international journals, and several articles (popular and technical) in many magazines and more than 80 papers in conferences and has given several invited talks.

Email:

Address:C 225, Department of Condensed Matter Physics & Materials Science, Tata Institute of Fundamental Research, Mumbai, India, 400005




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