Introducing the random anti-laser: coherent perfect absorption in disordered media

Location: 
Mann Engineer Student Center - Room 107 (located in Dunham Lab – 10 Hillhouse Ave) See map
10 Hillhouse Avenue
New Haven, CT 06511

Special Solid State & Optics Seminar Series

sponsored by “The Flint Fund Series on Quantum Devices and Nanostructures”

Thursday March 7, 2019

2:00 pm

Mann Engineer Student Center - Room 107

(located in Dunham Lab – 10 Hillhouse Ave)

Stefan Rotter

Institute for Theoretical Physics, Vienna

University of Technology (TU Wien), Vienna, Austria

Introducing the random anti-laser: coherent perfect absorption in disordered media

Abstract: In my talk I will present the concept of random anti-lasing, i.e., the time-reverse of random lasing. In the same way as a random laser emits a spatially complex but coherent wave at its first lasing threshold, the random anti-laser absorbs such a complex incoming field perfectly. We recently implemented this concept in a microwave experiment, where an absorber is embedded in the middle of a disordered medium [1]. Measuring the 8x8 scattering matrix of this structure allows us to calculate and then generate an incoming wave field that gets absorbed by more then 99.7 % inside the disorder. Our setup is scalable in the number of involved modes and can easily be transferred to other wave scattering systems. I will conclude with an outlook on the possible applications of this novel technology.

[1] K. Pichler, M. Kühmayer, J. Böhm, A. Brandstötter, P. Ambichl, U. Kuhl, and S. Rotter, Nature (in print).

Prof. Hui Cao

Applied Physics

Yale University

Event time: 
Thursday, March 7, 2019 - 2:00pm
Sponsor: 
The Flint Fund Series on Quantum Devices and Nanostructures”
Presented By: 
Stefan Rotter
Department: 
Institute for Theoretical Physics, Vienna University of Technology (TU Wien), Vienna, Austria
Hosted By: 
Prof. Hui Cao