期刊
PHYSICAL REVIEW LETTERS
卷 116, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.133902
关键词
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资金
- Agence Nationale de la Recherche through Project ORA [ANR 2010 BLAN-0312]
- Agence Nationale de la Recherche through Project CALIN [ANR 2010 BLAN-1002]
- Centre National d'Etudes Spatiales [R&T SHYRO R-S10/LN-0001-004]
- Direction Generale de l'Armement (DGA)
- Institut Universitaire de France (IUF)
Optical microcavities with ultralong photon storage times are of central importance for integrated nanophotonics. To date, record quality (Q) factors up to 10(11) have been measured in millimetric-size single-crystal whispering-gallery-mode (WGM) resonators, and 10(10) in silica or glass microresonators. We show that, by introducing slow-light effects in an active WGM microresonator, it is possible to enhance the photon lifetime by several orders of magnitude, thus circumventing both fabrication imperfections and residual absorption. The slow-light effect is obtained from coherent population oscillations in an erbium-doped fluoride glass microsphere, producing strong dispersion of the WGM (group index n(g) similar to 10(6)). As a result, a photon lifetime up to 2.5 ms at room temperature has been measured, corresponding to a Q factor of 3 x 10(12) at 1530 nm. This system could yield a new type of optical memory microarray with ultralong storage times.
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