ECE Seminar: Palash Bharadwaj

4:00 pm on Monday, January 26, 2015
6:00 pm on Monday, January 26, 2015
8 Saint Mary's Street, Photonics Center PHO 339
Palash Bharadwaj Photonics Laboratory at ETH Zurich "Antenna-coupled photons from single emitters and single electrons" Abstract: Optical antennas are devices that convert energy efficiently between propagating and localized radiation. This talk will briefly cover the history of optical antennas and will review our recent work in the field of antenna enhanced optical interactions within the context of nanoscale microscopy and spectroscopy. The similarities and differences between optical antennas and conventional radiowave antennas will be discussed, as well as how scanning near-field optical microscopy can borrow inspiration from STM to extend its domain of operation to include low-energy electrons as well. I will show that electrons in an STM or an integrated tunnel barrier can excite localized and propagating plasmons (SPPs) in optical antenna structures by inelastic tunneling, without the need of any external radiation. This opens up new opportunities for truly nanoscale ultrafast optoelectronic signal transduction. Speaker Bio: Palash did his Bachelors and Masters in Electrical Engineering at the Indian Institute of Technology Bombay in India. In 2003, he moved to the US for a PhD in Physics at the University of Rochester, where he worked in the group of Prof. Lukas Novotny on studying the enhancement of light-matter interaction by Optical Antennas. After a short postdoctoral stint in Rochester, he moved to Switzerland in 2012 to work as a Postdoc in the Photonics Laboratory at ETH Zurich. He is currently working on the optical characterization of novel 2-dimensional materials, and integrating these materials with optical antennas for nano-optoelectronic device applications. Faculty Host: Roberto Paiella Light Refreshments will be served at 3:45 pm.