Electromagnetically induced transparency with single atoms in a cavity.
Optical nonlinearities offer unique possibilities for the control of light with light. A prominent example is electromagnetically induced transparency (EIT), where the transmission of a probe beam through an optically dense medium is manipulated by means of a control beam. Scaling such experiments into the quantum domain with one (or just a few) particles of light and matter will allow for the implementation of quantum computing protocols with atoms and photons, or the realization of strongly interacting photon gases exhibiting quantum phase transitions of light. Reaching these aims is challenging and requires an enhanced matter-light interaction, as provided by cavity quantum electrodynamics. Here we demonstrate EIT with a single atom quasi-permanently trapped inside a high-finesse optical cavity. The atom acts as a quantum-optical transistor with the ability to coherently control the transmission of light through the cavity. We investigate the scaling of EIT when the atom number is increased one-by-one. The measured spectra are in excellent agreement with a theoretical model. Merging EIT with cavity quantum electrodynamics and single quanta of matter is likely to become the cornerstone for novel applications, such as dynamic control of the photon statistics of propagating light fields or the engineering of Fock state superpositions of flying light pulses.
Mücke
Martin
M
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany.
Figueroa
Eden
E
Bochmann
Joerg
J
Hahn
Carolin
C
Murr
Karim
K
Ritter
Stephan
S
Villas-Boas
Celso J
CJ
Rempe
Gerhard
G
Opt Lett. 2006 Sep 1;31(17):2625-7
16902640
Science. 2007 Jul 27;317(5837):488-90
17588899
Nature. 2008 Jun 19;453(7198):1023-30
18563153
Phys Rev Lett. 2005 Oct 21;95(17):173602
16383829
Phys Rev Lett. 2010 Oct 8;105(15):153603
21230902
Opt Lett. 1998 Feb 15;23(4):295-7
18084490
Phys Rev Lett. 2006 Dec 15;97(24):247401
17280321
Phys Rev Lett. 2007 May 11;98(19):193601
17677620
Phys Rev Lett. 2008 May 2;100(17):173602
18518287
Nature. 2004 Oct 28;431(7012):1075-8
15510142
Phys Rev Lett. 2009 Sep 18;103(12):123006
19792433
Nature. 2009 Jul 2;460(7251):76-80
19571881
Nature. 2009 Jun 25;459(7250):1105-9
19553994
Nature. 2005 Jul 7;436(7047):87-90
16001065
Phys Rev Lett. 2010 Jul 2;105(1):013601
20867442
Phys Rev Lett. 2002 Aug 5;89(6):067901
12190611
Science. 2004 Mar 26;303(5666):1992-4
14988512