Prof. Gautam Vemuri
Prof. Gautam Vemuri
Indiana University-Purdue University Indianapolis, USA
Title: Realization of time-delayed PT -symmetry in mutually coupled semiconductor lasers
This paper will describe our recent experimental and theoretical efforts on realizing a PT-symmetric dimer in a pair of optically coupled semiconductor lasers. The origin of PT-symmetry in this system will be motivated by starting from the Lang-Kobayashi laser rate equations and showing how they can be reduced to a PT-symmetric model with appropriate approximations. An experimental implementation of the model will be detailed and comparison to theoretical predictions made. The results show that the coupled laser system can be a versatile model for the study of PT-symmetric quantum mechanics.
Gautam Vemuri received his undergraduate degree in Physics (Honors) from St. Stephen’s College, New Delhi, India in 1984, an Sc.M (Physics) in 1986 from Brown University, Providence, RI and the Ph.D. (Physics) in 1990 from Georgia Institute of Technology, Atlanta, GA. He was a postdoc at JILA, University of Colorado, Boulder, CO from 1990-92, and has been on the Physics faculty at Indiana University Purdue University Indianapolis (IUPUI) since 1992. He is currently a Professor of Physics at IUPUI, and from 2002-2009 served as the Chair of the Department. His research interests are in laser physics and nonlinear optics, with special emphasis on stochastic and nonlinear dynamical behaviors of optical systems. He served on the editorial board of Optics Communications from 1998 to 2015, is on the editorial board of Research Letters in Physics since 2007, and on the editorial board of Pramana since 2013. He also served as a member of the Executive Committee of the American Physical Society’s Prairie Section in 2009. Vemuri has served as the editor of a special of the journal Optics Communications which is devoted to optics in the life sciences. In 2010, Vemuri was named a Senior Member of the Optical Society of America.