Focusing through random media in space and time: a transmission matrix approach
arXiv:1305.0940 · doi:10.1364/OL.38.002714
Abstract
We exploit the evolution in time of the transmission matrix following pulse excitation of a random medium to focus radiation at a selected time delay t' and position r. The temporal profile of a focused microwave pulse is the same as the incident Gaussian pulse. The contrast in space at time t' of the focused wave is determined by the participation number of transmission eigenvalues M' and the size N' of the measured transmission matrix. The initial rise and subsequent decay in contrast observed reflects the distribution of decay rates of the quasi-normal modes within the sample.
4 pages, 3 figures
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- Temporal recompression through a scattering medium via a broadband transmission matrix
- Dynamic and spectral properties of transmission eigenchannels in random media
- Statistics and control of waves in disordered media
- Pseudounitary Floquet scattering matrix for wave-front shaping in time-periodic photonic media
- Measuring the transmission matrix for microwave radiation propagating through random waveguides: fundamentals and applications