Showing papers by "Viktor A. Podolskiy published in 2004"
TL;DR: The analytical expression for the resolution limit of a LHM-based lens is derived and it is demonstrated that the area of its subwavelength performance is usually limited to the near-field zone.
Abstract: We consider the problem of subwavelength imaging via a slab of a left handed media (LHM) in the presence of material losses. We derive the expression for the resolution limit of LHM-based lens and demonstrate that the area of its subwavelength performance is usually limited to the near-field zone.
237 citations
TL;DR: A number of simplification and improvement on Hashiguchi's solution to the limitedness problem are made, able to improve the upper bound to 23n3+n lg n+n-1.
39 citations
TL;DR: In this article, the performance of a GaAs-InAs microdisk laser with rough boundary was investigated and shown to be robust with respect to the boundary roughness and corresponding ray chaos.
Abstract: We report the direct observation of lasing action from a dynamically localized mode in a microdisk resonator with rough boundary. In contrast to microlasers based on stable ray trajectories, the performance of our device is robust with respect to the boundary roughness and corresponding ray chaos, taking advantage of Anderson localization in angular momentum. The resonator design, although demonstrated here in GaAs-InAs microdisk laser, should be applicable to any lasers and sensors based on semiconductor or polymer materials.
35 citations
20 Jun 2004
TL;DR: In this paper, the optical response of metallic nanowires and nanowire composites is studied and the authors explore the electromagnetic properties of nanostructured plasmonic antennas and show that they can be effectively used for light nano-confinement, field enhancement and allow one to achieve left-handed response from the nanoantenna composite.
Abstract: We focus on the optical response of metallic nanowires and nanowire composites. Because nanowires and their composites can act as antennas, we can use the terms "nanoantenna" and "nanowire" interchangeably. We explore the electromagnetic properties of nanostructured plasmonic antennas and show that they can be effectively used for light nano-confinement, field enhancement, and allow one to achieve left-handed response from the nanoantenna composite.
4 citations
16 May 2004
TL;DR: In this article, high-Q modes with unidirectional emission are present in spiral-shaped microresonators despite completely chaotic ray dynamics, and the formation of such modes is due to dynamical localization.
Abstract: High-Q modes with unidirectional emission are present in spiral-shaped microresonators despite completely chaotic ray dynamics. We demonstrate that formation of such modes is due to dynamical localization, and develop the theory of this effect
2 citations
TL;DR: In this article, double spiral design of dielectric microresonators is proposed to control the mode lifetime and emission directionality of the dielectrics, taking advantage of chaotic ray dynamics and dynamical localization.
Abstract: We consider double spiral design of dielectric microresonators. Unlike the conventional systems, based on stable ray trajectories, this device takes advantage of chaotic ray dynamics and dynamical localization, to control mode lifetime and emission directionality. We develop theoretical description of the proposed system performance and consider its applications.
16 May 2004
TL;DR: In this article, dynamical localization in semiconductor microdisks with rough boundary was observed. And the authors showed that the lasing mode is localized near the disk edge and that the scattering effect is strongly suppressed by dynamical Anderson localization.
Abstract: We observe dynamical localization in semiconductor microdisks with rough boundary. Scattering effect is strongly suppressed by dynamical Anderson localization. Near-field images of laser emission reveal that the lasing mode is localized near the disk edge
21 May 2004
TL;DR: In this paper, the authors show that the lifetime and emission patterns of whispering gallery modes in asymmetric dielectric microlasers are strongly affected by chaos assisted tunneling, and develop the theory of this effect.
Abstract: We show that lifetimes and emission patterns of the whispering gallery modes in asymmetric dielectric microlasers are strongly affected by chaos assisted tunneling, and develop the theory of this effect
TL;DR: In this article, the authors developed a new approach to build left-handed material (LHM) based on anisotropic dielectric permittivity, which is non magnetic.
Abstract: We develop a new approach to build left-handed material (LHM). In contrast to conventional resonance-based LHM designs, our material is non magnetic, and is based on anisotropic dielectric permittivity. We develop theory of its right- and left-handed response, and suggest a number of feasible systems for infrared and optical LHMs.