Bulletin of the American Physical Society
52nd Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 66, Number 6
Monday–Friday, May 31–June 4 2021; Virtual; Time Zone: Central Daylight Time, USA
Session S09: Nanophotonics
10:30 AM–12:18 PM,
Thursday, June 3, 2021
Chair: Xu Yi, UVA
Abstract: S09.00005 : Magnetic field-free non-reciprocal Raman amplification of fiber-guided light enabled by chirally coupled spin-polarized atomsĀ *
11:18 AM–11:30 AM
Live
Presenter:
Christian Liedl
(Humboldt University of Berlin)
Authors:
Christian Liedl
(Humboldt University of Berlin)
Sebastian Pucher
(Humboldt University of Berlin)
Shuwei Jin
(Humboldt University of Berlin)
Arno Rauschenbeutel
(Humboldt University of Berlin)
Philipp Schneeweiss
(Humboldt University of Berlin)
While respective isolators and circulators have been demonstrated recently, a corresponding non-reciprocal amplifier is hitherto missing. Here, we experimentally show non-reciprocal Raman amplification of light pulses using spin-polarized atoms that are chirally coupled to an optical nanofiber.
We control the direction in which amplification occurs via the Zeeman state in which the atoms are prepared. We observe an exponential increase of the optical output power with the number of atoms and obtain over 40 % single-pass gain for about 2000 atoms. In addition, we show that non-reciprocal amplification prevails in the absence of an offset magnetic field. Our results can be readily transferred to other types of nanophotonic waveguides and quantum emitters which feature circularly polarized optical transitions.
*Financial support from the Alexander von Humboldt Foundation (Alexandervon Humboldt-Professorship) is gratefully acknowledged.
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