5th International Conference on Emerging Electronics

Hosted by- Indian Institute of Technology Delhi, India

Tutorials: November 25th

Tutorial 4 : Terahertz Devices

Date: November 25th

"A. Terahertz (THz) Spectroscopy and Metamaterials in THz"

Prof. Shriganesh Prabhu

We will review the field of Tera-Hertz (THz) Spectroscopy and THz applications. We will review different types of spectroscopy and sources, detectors used. We demonstrate many novel photo-conductive antenna (PCA) designs, capable of emitting Terahertz radiation with high average power. For Example, one such device consists of Au electrodes on a semi-insulating GaAs substrate. THz spectroscopy is useful in material studies as well. Resonant transmission of electromagnetic radiation through an array of rectangular apertures occurs when electric field vectors of the incident wave are perpendicular to the long axis of the aperture. We study several designs of Metmaterials. Here we will mention about periodic array of asymmetric aperture and demonstrate that introducing a taper along long axis can yield transmission for both orthogonal polarizations. We present several studies of different Metamaterial designs and describe some interesting results obtained using external perturbations on these Metamaterial substrates.

"B. Terahertz Sensors, Antennas, and Systems:Innovative Designs and Implementation"

Dr. Goutam Chattopadhyay

NASA's Jet Propulsion Laboratory (JPL), which completed eighty years of its existence in 2016, builds instruments for NASA missions. Exploring the universe and our own planet Earth from space has been the mission of NASA. Robotics missions such as Voyager, which continues to go beyond our solar system, missions to Mars and other planets, exploring the stars and galaxies for astrophysics missions.

It turns out that this universe is brightest at the terahertz frequencies. At JPL we are developing instruments at terahertz frequencies to make measurements that can answer some of the important science questions. In this presentation, we will present an overview of the state of the art instruments that we are currently developing and layout the details of the science questions they will try to answer. The focus will be on the key parts of the instrument design: sensors, antennas, and other systems. Rapid progress on multiple fronts, such as commercial software for component and device modeling, low-loss circuits and interconnect technologies, cell phone technologies, and submicron scale lithographic techniques are making it possible for us to design and develop smart, low-power yet very powerful instruments that can even fit in a SmallSat or CubeSat. We will also discuss the challenges of the future generation instruments in addressing the needs for critical scientific applications.

The research described herein was carried out at the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA, under contract with National Aeronautics and Space Administration.

Who Can Attend?

1. Graduate students (ME/MTech/PhD), post-doctoral fellows, and faculty from academic/technical institutions.

2. Any professional working in scientific research or industry working in development and application of Terahertz Devices.

Prof. Shriganesh Prabhu

Professor, Department of Condensed Matter Physics & Materials Science, India

PhD in Physics from TIFR. Currently Associate Professor of Physics. He has more than 52 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. Research Interests are Ultrafast Time resolved Phenomena in Materials, THz Spectroscopy of Materials, Metamaterials, High field THz and Near Field THz Microscopy

Dr. Goutam Chattopadhyay

Senior Research Scientist, NASA's Jet Propulsion Laboratory, California Institute of Technology

Dr. Goutam Chattopadhyay (Student Member IEEE 1993, Member IEEE 1999, Senior Member IEEE 2001, Fellow IEEE 2011) is a Senior Research Scientist at the NASA's Jet Propulsion Laboratory, California Institute of Technology, a Visiting Associate at the Division of Physics, Mathematics, and Astronomy at the California Institute of Technology, Pasadena, USA, BEL Distinguished Chair Professor at the Indian Institute of Science, Bangalore, India, and an Adjunct Professor at the Indian Institute of Technology, Kharagpur, India. He received the Ph.D. degree in electrical engineering from the California Institute of Technology (Caltech), Pasadena, in 2000. He is a Fellow of IEEE (USA) and IETE (India) and an IEEE Distinguished Lecturer.