Stationary light pulses in cold atomic media and without Bragg gratings

Yen Wei Lin, Wen Te Liao, Thorsten Peters, Hung Chih Chou, Jian Siung Wang, Hung Wen Cho, Pei Chen Kuan, Ite A. Yu

Research output: Contribution to journalArticlepeer-review

106 Scopus citations


We study the creation of stationary light pulses (SLPs), i.e., light pulses without motion, based on the effect of electromagnetically induced transparency with two counterpropagating coupling fields in cold atoms. We show that the Raman excitations created by counterpropagating probe and coupling fields prohibit the formation of SLPs in media of cold and stationary atoms such as laser-cooled atom clouds, Bose condensates or color-center crystals. A method is experimentally demonstrated to suppress these Raman excitations and SLPs are realized in laser-cooled atoms. Furthermore, we report the first experimental observation of a bichromatic SLP at wavelengths for which no Bragg grating can be established. Our work advances the understanding of SLPs and opens a new avenue to SLP studies for few-photon nonlinear interactions.

Original languageEnglish
Article number213601
JournalPhysical Review Letters
Issue number21
StatePublished - 26 May 2009


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