Weak localization of photon noise
| Abstract | We present an experimental study of coherent backscattering (CBS) ofphoton noise from multiple scattering media. We use a pseudothermallight source with a microsecond coherence time to produce a noisespectrum covering a continuous transition, from wave fluctuations toshot noise over several MHz. The angle-dependent Fano factor ofbackscattered light shows an enhancement due to CBS in the wavefluctuation regime. The CBS line shape and enhancement factor of thenoise power is consistent with theory in the weak-scattering limit andfor a large number of open reflection channels. These initialexperiments on weakly scattering media demonstrate that sensitive noisemeasurements can be combined with the separation of path lengths presentin CBS, opening up new experiments on noise transport in thelocalization regime. |
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| Authors | P. S. Scalia, O. L. Muskens, A. Lagendijk |
| Year of publication | 2013 |
| Date published | 10/2013 |
| Journal | New J. Phys. |
| Volume | 15 |
| Pages | 105009: 1-12 |
| Keywords | multiple scattering, quantum optics, shot noise, weak localization |