Ultra-slow light propagation by self-induced transparency in ruby in the superhyperfine limit

DOI	Resolve DOI: https://doi.org/10.1364/OL.42.001871
Author	Search for: Riesen, Hans; Search for: Rebane, Aleksander; Search for: Rajan, Rajitha Papakutty; Search for: Hutchison, Wayne; Search for: Ganschow, Steffen; Search for: Szabo, Alex¹
Name affiliation	National Research Council of Canada. Security and Disruptive Technologies
Format	Text, Article
Abstract	Self-induced transparency is reported for circularly polarized light in the R1(−3/2) line of a 30 ppm ruby (3α-Al2O3:Cr3+) at 1.7 K in a magnetic field of B‖c=4.5 T. In such a field and temperature, a 30 ppm ruby is in the so-called superhyperfine limit resulting in a long phase memory time, TM=50 μs, and a thousand-fold slower pulse propagation velocity of ∼300 m/s was observed, compared to the ∼300 km/s measured in the first observation of self-induced transparency (SIT) ∼50 years ago, that employed a ruby with a 500 ppm chromium concentration in zero field and at 4.2 K. To date, this is the slowest pulse propagation ever observed in a SIT experiment.
Publication date	2017
Publisher	Optical Society of America
In	Optics Letters 42, no. 10: 1871–1874.
Language	English
Peer reviewed	Yes
NPARC number	23002310
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Record identifier	2e568d78-118b-46f2-bc67-0173181406af
Record created	2017-10-13
Record modified	2020-03-16