Two photon absorption and coherent control with broadband down-converted light
We experimentally demonstrate two-photon absorption with broadband down-converted light (squeezed vacuum). Although incoherent and exhibiting the statistics of a thermal noise, broadband down-converted light can induce two-photon absorption with the same sharp temporal behavior as femtosecond pulses...
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| Published in | Physical review letters Vol. 93; no. 2; p. 023005 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
09.07.2004
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| Online Access | Get more information |
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| Summary: | We experimentally demonstrate two-photon absorption with broadband down-converted light (squeezed vacuum). Although incoherent and exhibiting the statistics of a thermal noise, broadband down-converted light can induce two-photon absorption with the same sharp temporal behavior as femtosecond pulses, while exhibiting the high spectral resolution of the narrow band pump laser. Using pulse-shaping methods, we coherently control two-photon absorption in rubidium, demonstrating spectral and temporal resolutions that are 3-5 orders of magnitude below the actual bandwidth and temporal duration of the light itself. Such properties can be exploited in various applications such as spread-spectrum optical communications, tomography, and nonlinear microscopy. |
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| ISSN: | 0031-9007 |
| DOI: | 10.1103/PhysRevLett.93.023005 |