Erlangen 2018 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 17: Bose-Einstein Condensation (joint session A/Q)
Q 17.5: Vortrag
Montag, 5. März 2018, 15:00–15:15, K 2.016
A coherent perfect absorber for matter waves — •Jens Benary1, Andreas Müllers1, Bodhaditya Santra1, Christian Baals1,2, Jian Jiang1, Ralf Labouvie1,2, Dmitry A. Zezyulin3,4, Vladimir V. Konotop4, and Herwig Ott1 — 1Department of Physics and OPTIMAS research center, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, 55128 Mainz, Germany — 3ITMO University, St. Petersburg 197101, Russia — 4Centro de Física teórica e Computacional and Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Lisboa 1749-016, Portugal
A coherent perfect absorber is a system in which complete absorption of incoming radiation is achieved by a spatially localized absorber embedded in a wave-guiding medium. The concept of coherent perfect absorption (CPA) was introduced [1] for light interacting with absorbing scatterers. The phenomenon is based on the destructive interference of the transmitted and reflected waves. Extending the paradigm of CPA to nonlinear matter waves we find that the conditions for CPA can be achieved easier than in the linear case. This is due to the combination of a nonlinear medium with localized absorption stabilizing the system. We experimentally demonstrate CPA for matter waves with an atomic Bose-Einstein condensate of Rb-87 in a one-dimensional periodic potential with an absorbing lattice site. This absorption is tailored via an electron beam which locally induces losses.
[1] Y. D. Chong , L. Ge, H. Cao and A. D. Stone, Coherent Perfect Absorbers: Time-Reversed Lasers. Phys. Rev. Lett. 105 053901 (2010)