Cavity-Enhanced Room-Temperature Broadband Raman Memory
| Autor: | Amir Feizpour, C. Qiu, Krzysztof T. Kaczmarek, Eilon Poem, T. F. M. Champion, Dylan J. Saunders, Joshua Nunn, Patrick M. Ledingham, S. E. Thomas, Ian A. Walmsley, J. H. D. Munns |
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| Rok vydání: | 2015 |
| Předmět: |
Quantum Physics
Materials science business.industry General Physics and Astronomy FOS: Physical sciences 01 natural sciences Noise (electronics) 010309 optics symbols.namesake Optics 0103 physical sciences Broadband symbols Photonics 010306 general physics business Raman spectroscopy Quantum Physics (quant-ph) Quantum Mixing (physics) |
| Zdroj: | Saunders, D J, Munns, J H D, Champion, T F M, Qiu, C, Kaczmarek, K T, Poem, E, Ledingham, P M, Walmsley, I A & Nunn, J 2016, ' Cavity-enhanced room-temperature broadband Raman memory ' Physical Review Letters, vol. 116, no. 9, 090501 . https://doi.org/10.1103/PhysRevLett.116.090501 |
| ISSN: | 1079-7114 |
| Popis: | Broadband quantum memories hold great promise as multiplexing elements in future photonic quantum information protocols. Alkali vapour Raman memories combine high-bandwidth storage, on-demand read-out, and operation at room temperature without collisional fluorescence noise. However, previous implementations have required large control pulse energies and suffered from four-wave mixing noise. Here we present a Raman memory where the storage interaction is enhanced by a low-finesse birefringent cavity tuned into simultaneous resonance with the signal and control fields, dramatically reducing the energy required to drive the memory. By engineering anti-resonance for the anti-Stokes field, we also suppress the four-wave mixing noise and report the lowest unconditional noise floor yet achieved in a Raman-type warm vapour memory, $(15\pm2)\times10^{-3}$ photons per pulse, with a total efficiency of $(9.5\pm0.5)$%. |
| Databáze: | OpenAIRE |
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