Light Transport in Random Media with PT -symmetry
نویسندگان
چکیده
The scattering properties of randomly layered optical media with PT -symmetric index of refraction are studied using the transfer-matrix method. We find that the transmission coefficient decays exponentially as a function of the system size, with an enhanced rate ξγ(W ) −1 = ξ0(W ) +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 PT -symmetric refraction index profile. While transmission processes are reciprocal to left and right incident waves, the reflection is enhanced from one side and is inversely suppressed from the other, thus allowing such PT -symmetric random media to act as unidirectional coherent absorbers.
منابع مشابه
Quantum Squeezed Light Propagation in an Optical Parity-Time (PT)-Symmetric Structure
We investigate the medium effect of a parity-time (PT)-symmetric bilayer on the quantum optical properties of an incident squeezed light at zero temperature (T=0 K). To do so, we use the canonical quantization approach and describe the amplification and dissipation properties of the constituent layers of the bilayer structure by Lorentz model to analyze the quadrature squeezing of the outgoing ...
متن کاملTransport Property Estimation of Non-Uniform Porous Media
In this work a glass micromodel which its grains and pores are non-uniform in size, shape and distribution is considered as porous medium. A two-dimensional random network model of micromodel with non-uniform pores has been constructed. The non-uniformity of porous model is achieved by assigning parametric distribution functions to pores throat and pores length, which was measured using ima...
متن کاملAnti-parity–time symmetry with flying atoms
The recently developed notion of parity–time (PT) symmetry in optical systems has spawned intriguing prospects. So far, most experimental implementations have been reported in solid-state systems. Here, we report the first experimental demonstration of optical anti-PT symmetry—the counterpart of conventional PT symmetry—in a warm atomic-vapour cell. Rapid coherence transport via flying atoms le...
متن کاملParity–time symmetry and variable optical isolation in active–passive-coupled microresonators
Compound-photonic structures with gain and loss1 provide a powerful platform for testing various theoretical proposals on non-Hermitian parity–time-symmetric quantum mechanics2–5 and initiate new possibilities for shaping optical beams and pulses beyond conservative structures. Such structures can be designed as optical analogues of complex parity–timesymmetric potentials with real spectra. How...
متن کاملRadiative transport for two-photon light
The propagation of light in disordered media, including clouds, colloidal suspensions, and biological tissues, is generally considered within the framework of classical optics [1]. However, recent experiments have demonstrated the existence of novel effects in multiple light scattering, in which the quantized nature of the electromagnetic field is manifest. These include (i) the transport of qu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2011