Dynamic and spectral properties of transmission eigenchannels in random media

Article

关键词: STRONGLY SCATTERING MEDIA;    RANDOM-MATRIX THEORY;    DISORDERED MEDIA;    LASER ACTION;    TRANSPORT;    LIGHT;    FLUCTUATIONS;    TIME;    LOCALIZATION;    CONDUCTANCE;   

DOI  :  10.1103/PhysRevB.92.184202

来源: SCIE

【 摘 要 】

The eigenvalues of the transmission matrix provide the basis for a full description of the statistics of steady-state transmission and conductance and for control of transmitted waves. However, the nature of pulsed transmission of the transmission eigenchannels and their spectral correlation, which would permit control of propagation in the time domain, has not yet been discussed. Here we report the dramatic variation of the dynamic properties of transmission with incident waveform. Computer simulations show that lower-transmission eigenchannels respond more promptly to an incident pulse and are correlated over a wide frequency range. We explain these results together with the puzzlingly large dynamic range of transmission eigenvalues in terms of the way the quasinormal modes of the medium combine to form specific transmission eigenchannels. Key factors are the closeness of the illuminating waves to resonance with the modes forming an eigenchannel and the strong anticorrelation of low-transmission eigenchannels with resonant modes. In addition, the spectral range of modes comprising the transmission eigenchannel increases with decreasing transmission, which leads to an additional substantial suppression of transmission due to destructive interference.

【 授权许可】

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