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We develop a comprehensive theoretical model for the maximum transmission eigenchannel and obtain a closed-form analytical expression relating its spatial profile to the shape of a disordered waveguide.
We introduce a class of critical states which are embedded in the continuum (CSC) of one-dimensional optical waveguide array with a non-Hermitian defect.
Diffusion is a statistical description of random walk of a classical particle, and the diffusion constant D0 is the only parameter in the diffusion equation. For light as well as for other kinds of waves, this is an approximation, because the interference of partial waves is ignored [1]. Such interference is essential to Anderson localization. Proper account of the interference effects in random samples...
Directional ultraviolet lasing at room temperature in 3D ZnO photonic crystals is reported. Comparison of measured optical properties with the calculated band structures shows that lasing occurs due to slow-propagating modes in high-order photonic bands.
We demonstrated lasing in a microscopic cavity made of two nanoparticles in a homogeneous gain medium. The particles, either dielectric or metallic, acted as nano-mirrors. Such laser had well-defined lasing frequencies and produced directional output.
Spatial intensity correlation functions of semicontinuous metal-dielectric films of varying metal concentration, p, were obtained from near-field microscopy. The data shows a transition from propagation to localization and back to propagation of optical excitations with increase in p
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