By Dr. Gaurav Jayaswal (CEMSE, KAUST)
The increasing energy demands of growing world population with depleting fossil fuel reserves indicate the urgent need for seeking long-lasting alternative renewable energy resources. My current research project (a joint project of KAUST-Saudi Arabia and University of Colorado-USA) aims at the development of an innovative nanodevice that is able to harvest energy from waste heat and generate DC electricity. Waste heat varies, approximately, between 400 K and 2000 K (2-11 μm in wavelength) and is significantly produced by different sources such as metal heating and melting, steam generation, fluid heating, heat treating, and agglomeration. The idea is to treat the waste heat as very high frequency (Terahertz or THz) electromagnetic waves, which can be collected and rectified by a combination of nano antenna and rectifier, typically known as a rectenna device.
The relatively high frequency of operation for THz rectennas leads to challenges not only in the fabrication of the nanoantennas but also in the rectification process since no electronic rectifier has high enough switching speed to track a THz signal. In my presentation, I am going to talk about design and fabrication of various nano-antenna geometries for captured field enhancement and also about their seamless integration with the rectifier circuits to generate DC from THz signals without the application of any external electric source. For rectifier function at THz frequencies, Metal-Insulator-Metal (MIM) diodes will be explored because of their fast response time. In addition, diode innovations will be explored to improve the conversion efficiency from the low voltages produced by the nano-antenna and relatively large reverse leakage currents in the MIM diodes.
Education:* Post-Doctoral at Dept. of Computer, Electrical and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Saudi Arabia. (March 2015 to till date..)
* Doctorate of Philosophy (PhD) in Physics. Department of Physics and Astronomy “Galileo Galilei”- University of Padova Italy (Jan-2012-March-2015)
* Bachelor of Technology (B.Tech), Electronic and Tele-Communication, Biju Patnaik University of Technology-Orissa, India (2005-2009)
* Research Assistant at Indian Indian Institute of Technology-Mumbai, India (June 2011-Dec 2011)
* Visiting Research Student at Scuola Normale Superiore-National Enterprise of Nano-Science and Nano-Technology, Pisa-Italy (Feb 2011-May 2011)
* Junior Research Fellow at Tata Institute of Fundamental Research-Mumbai, India (Oct 2009-Feb 2011)
* Visiting student at National University of Singapore (Dec 2008-Jan 2009)
For more info contact: Dr. Gaurav Jayaswal : email: email@example.com
Date: Sunday 19th Feb 2017
Time:12:00 PM - 12:30 PM
Location: Location: Building 9, Hall I Room 2322
Refreshments: Refreshments: Light Lunch will be available at 11:45 am