Millisecond Photon Lifetime in a Slow-Light Microcavity

Abstract : 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 ng∼106). As a result, a photon lifetime up to 2.5 ms at room temperature has been measured, corresponding to a Q factor of 3×10^12 at 1530 nm. This system could yield a new type of optical memory microarray with ultralong storage times.
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Submitted on : Wednesday, April 27, 2016 - 10:45:22 AM
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Vincent Huet, Alphonse Rasoloniaina, Pierre Guillemé, Philippe Rochard, Patrice Féron, et al.. Millisecond Photon Lifetime in a Slow-Light Microcavity. Physical Review Letters, American Physical Society, 2016, 116 (133902), ⟨10.1103/PhysRevLett.116.133902⟩. ⟨hal-01308037⟩



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