Millisecond Photon Lifetime in a Slow-Light Microcavity
Millisecond Photon Lifetime in a Slow-Light Microcavity
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DOI：
10.1103/physrevlett.116.133902
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发表时间：
2016-03-29
影响因子：
8.6
通讯作者：
Dumeige, Y.
中科院分区：
文献类型：
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作者：
Huet, V.;Rasoloniaina, A.;Dumeige, Y.
具有超长光子存储时间的光学微腔对于集成纳米光子学至关重要。迄今为止，在毫米级单晶回音壁模式 (WGM) 谐振器中测得的质量 (Q) 因子高达 10(11)，在二氧化硅或玻璃微谐振器中测得的质量 (Q) 因子高达 10(10)。我们表明，通过在有源 WGM 微谐振器中引入慢光效应，可以将光子寿命提高几个数量级，从而避免制造缺陷和残余吸收。慢光效应是通过掺铒氟化物玻璃微球中的相干布居振荡获得的，产生 WGM 的强色散（群指数 n(g) 类似于 10(6)）。结果，在室温下测量了高达 2.5 ms 的光子寿命，对应于 1530 nm 处的 3 x 10(12) Q 因子。该系统可以产生一种具有超长存储时间的新型光学存储微阵列。
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.