2012/05/09 by Samuel Kalish, Kalish, Samuel, Zin Lin +3
Engineering · Physics and Astronomy · #FOS: Physical sciences #Optics (physics.optics) #Quantum Mechanics and Non-Hermitian Physics #Random lasers and scattering media #Terahertz technology and applications #physics.optics
paper · pdf · doi:10.48550/arxiv.1205.1849
arxiv created 2012/05/09 · openalex publication_date 2012/05/09 · arxiv updated 2012/05/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The scattering properties of randomly layered optical media with \cal PT-symmetric index of refraction are studied using the transfer-matrix method. We find that the transmitance decays exponentially as a function of the system size, with an enhanced rate ξγ(W)-1=ξ0(W)-1+ξγ (0)-1, where ξ0(W) is the localization length of the equivalent passive random medium and ξγ(0) is the attenuation/amplification length of the corresponding perfect system with a \cal PT-symmetric refraction index profile. While transmitance processes are reciprocal to left and right incident waves, the reflectance is enhanced from one side and is inversely suppressed from the other, thus allowing such \cal PT-symmetric random media to act as unidirectional coherent absorbers.