Weak localization of photon noise
Weak localization of photon noise
We present an experimental study of coherent backscattering (CBS) of photon noise from multiple scattering media. We use a pseudothermal light source with a microsecond coherence time to produce a noise spectrum covering a continuous transition, from wave fluctuations to shot noise over several MHz. The angle-dependent Fano factor of backscattered light shows an enhancement due to CBS in the wave fluctuation regime. The CBS line shape and enhancement factor of the noise power is consistent with theory in the weak-scattering limit and for a large number of open reflection channels. These initial experiments on weakly scattering media demonstrate that sensitive noise measurements can be combined with the separation of path lengths present in CBS, opening up new experiments on noise transport in the localization regime.
105009-[13pp]
Scalia, Paolo S.
b0be8a43-adda-4ed2-98ae-b0ad1c3341f8
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Lagendijk, Ad
654e90ee-9b9c-4140-9dd5-18354cfa6c7a
2013
Scalia, Paolo S.
b0be8a43-adda-4ed2-98ae-b0ad1c3341f8
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Lagendijk, Ad
654e90ee-9b9c-4140-9dd5-18354cfa6c7a
Abstract
We present an experimental study of coherent backscattering (CBS) of photon noise from multiple scattering media. We use a pseudothermal light source with a microsecond coherence time to produce a noise spectrum covering a continuous transition, from wave fluctuations to shot noise over several MHz. The angle-dependent Fano factor of backscattered light shows an enhancement due to CBS in the wave fluctuation regime. The CBS line shape and enhancement factor of the noise power is consistent with theory in the weak-scattering limit and for a large number of open reflection channels. These initial experiments on weakly scattering media demonstrate that sensitive noise measurements can be combined with the separation of path lengths present in CBS, opening up new experiments on noise transport in the localization regime.
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1367-2630_15_10_105009.pdf
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Published date: 2013
Organisations:
Quantum, Light & Matter Group
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Local EPrints ID: 360071
URI: http://eprints.soton.ac.uk/id/eprint/360071
PURE UUID: 5e4b8c16-616d-41a3-b82f-cfcecc43820b
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Date deposited: 25 Nov 2013 13:29
Last modified: 15 Mar 2024 03:34
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Author:
Paolo S. Scalia
Author:
Ad Lagendijk
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