High purity bright single photon source
| Autor: | Neergaard-Nielsen, J. S., Nielsen, B. Melholt, Takahashi, H., Vistnes, A. I., Polzik, E. S. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Zdroj: | Opt. Express 15, 7940-7949 (2007) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OE.15.007940 |
| Popis: | Using cavity-enhanced non-degenerate parametric downconversion, we have built a frequency tunable source of heralded single photons with a narrow bandwidth of 8 MHz, making it compatible with atomic quantum memories. The photon state is 70% pure single photon as characterized by a tomographic measurement and reconstruction of the quantum state, revealing a clearly negative Wigner function. Furthermore, it has a spectral brightness of ~1,500 photons/s per MHz bandwidth, making it one of the brightest single photon sources available. We also investigate the correlation function of the down-converted fields using a combination of two very distinct detection methods; photon counting and homodyne measurement. Comment: 9 pages, 4 figures; minor changes, added reference |
| Databáze: | arXiv |
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