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Abstract
This thesis reports results on quantum properties of light in multiple-scattering
nano-structured materials.
Spatial quantum correlations of photons are demonstrated experimentally
that are induced by multiple scattering of squeezed light and of purely quantum
origin. By varying the quantum state of the light source, positive and
negative spatial quantum correlations are observed. Angular-resolved measurements
of multiply scattered photons show the innite range of the correlation
function in the diusive regime. The multiply scattered light is characterized
in frequency-resolved quantum noise measurements as well as in time-resolved
photon-coincidence measurements and the experimental results are in excellent
agreement with the quantum theory of multiple scattering. Probing the noise
properties of light in the coherent backscattering cone reveals an enhancement
factor of the multiply scattered photon uctuations that is larger than the predicted
enhancement of the backscattered light intensity. Characterizing the
quantum properties of multiply scattered light forms the basis for studies of
quantum interference and quantum entanglement in disordered media.
Anderson localization of light is demonstrated in disordered photonic crystal
waveguides. Transmission measurements show that the localization length is
strongly dispersive, allowing the control of one-dimensional Anderson localization
of light. The statistical properties of Anderson localization are probed by
embedding quantum dot light sources in disordered photonic crystal waveguides.
From photoluminescence measurements, the spectral distribution of
Anderson-localized modes is determined. Comparing the experimental data
with one-dimensional analytical calculations provides a novel method to unambiguously
distinguish Anderson localization from losses.
Original language | English |
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Place of Publication | Kgs. Lyngby, Denmark |
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Publisher | Technical University of Denmark |
Number of pages | 157 |
ISBN (Print) | 87-92062-48-2 |
Publication status | Published - Sep 2010 |
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Dive into the research topics of 'Quantum correlations and light localization in disordered nanophotonic structures'. Together they form a unique fingerprint.Projects
- 1 Finished
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Quantum Optics in Nano-Structured Materials
Smolka, S., Lodahl, P., Andersen, U. L., Mortensen, N. A., Wiersma, D. S. & Thomsen, J. W.
01/07/2007 → 29/09/2010
Project: PhD