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Photonic crystal

About: Photonic crystal is a research topic. Over the lifetime, 43424 publications have been published within this topic receiving 887083 citations.


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Journal ArticleDOI
10 Aug 2001-Science
TL;DR: Polarization mode selection in a two-dimensional (2D) photonic crystal laser is demonstrated by controlling the geometry of the unit cell structure by observing coherent lasing action with a single wavelength and controlled polarization in good agreement with the predicted behavior.
Abstract: We demonstrate polarization mode selection in a two-dimensional (2D) photonic crystal laser by controlling the geometry of the unit cell structure. As the band diagram of the square-lattice photonic crystal is influenced by the unit cell structure, calculations reveal that changing the structure from a circular to an elliptical geometry should result in a strong modification of the electromagnetic field distributions at the band edges. Such a structural modification is expected to provide a mechanism for controlling the polarization modes of the emitted light. A square-lattice photonic crystal with the elliptical unit cell structure has been fabricated and integrated with a gain media. The observed coherent 2D lasing action with a single wavelength and controlled polarization is in good agreement with the predicted behavior.

605 citations

Journal ArticleDOI
TL;DR: In this paper, a general analysis of the tunneling process through localized resonant states between onedimensional continuums is presented, where the degeneracy must exist in both the real and imaginary parts of the frequency.
Abstract: We present a general analysis of the tunneling process through localized resonant states between onedimensional continuums. We show that complete transfer can occur between the continuums by creating resonant states of different symmetry, and by forcing an accidental degeneracy between them. The degeneracy must exist in both the real and imaginary parts of the frequency. We illustrate the results of the analysis by performing computational simulations on the transport properties of electromagnetic waves in a two-dimensional photonic crystal. [S0031-9007(97)05091-6] Resonant tunneling processes can occur between states when they interact through a coupling element which supports localized resonances. Of particular interest is the complete channel drop tunneling between one-dimensional continuums, i.e., the selective transfer of a single propagating state (i.e., monoenergy electron, or single-frequency photon) from one continuum to the other, leaving all other states unaffected. Examples include the transfer of states between electron waveguides [1,2] through a quantum dot device, and the transfer of photonic states between dielectric waveguides through an optical resonator system. Such transfer processes are important for single-energy electron spectroscopy or wavelength demultiplexing in optical communication systems [3,4]. However, to our knowledge, the general conditions needed to realize optimal transfer until now have not been recognized. In this Letter, we determine the general characteristics of the coupling element required to achieve complete channel drop tunneling. We begin by presenting a qualitative analysis using symmetry and energy conservation arguments which identifies the important ingredients needed in constructing an analytical theory. Using a rigorous mathematical formalism, we then demonstrate that complete transfer can occur by creating resonant states of different symmetry, and by forcing an accidental degeneracy of both the real and imaginary parts of the frequency between the resonant states. We illustrate the results of the analysis by simulating the transport properties of electromagnetic waves in a two-dimensional photonic crystal.

594 citations

Journal ArticleDOI
TL;DR: This tutorial review highlights fundamental aspects of the physics underpinning the science of photonic crystals, insight into building-block assembly routes to the fabrication of different photonic crystal structures and compositions is provided, and a glimpse into future applications is taken.
Abstract: In this tutorial review we highlight fundamental aspects of the physics underpinning the science of photonic crystals, provide insight into building-block assembly routes to the fabrication of different photonic crystal structures and compositions, discuss their properties and describe how these relate to function, and finally take a glimpse into future applications.

590 citations

Journal ArticleDOI
20 Apr 2007-Science
TL;DR: An experimental realization of a two-dimensional negative-index material in the blue-green region of the visible spectrum is demonstrated, substantiated by direct geometric visualization of negative refraction, which may enable the development of practical negative- index optical designs in the visible regime.
Abstract: Nanofabricated photonic materials offer opportunities for crafting the propagation and dispersion of light in matter. We demonstrate an experimental realization of a two-dimensional negative-index material in the blue-green region of the visible spectrum, substantiated by direct geometric visualization of negative refraction. Negative indices were achieved with the use of an ultrathin Au-Si3N4-Ag waveguide sustaining a surface plasmon polariton mode with antiparallel group and phase velocities. All-angle negative refraction was observed at the interface between this bimetal waveguide and a conventional Ag-Si3N4-Ag slot waveguide. The results may enable the development of practical negative-index optical designs in the visible regime.

589 citations

Journal ArticleDOI
TL;DR: It is shown that in dielectrics exhibiting a complete photonic band gap, quantum electrodynamics predicts the occurrence of bound states of photons to hydrogenic atoms.
Abstract: It is shown that in dielectrics exhibiting a complete photonic band gap, quantum electrodynamics predicts the occurrence of bound states of photons to hydrogenic atoms. When the atomic transition frequency lies near a photonic band edge, the excited atomic level experiences an anomalous Lamb shift and splits into a doublet. One member of this doublet exhibits resonance fluorescence whereas the other level is dressed by the emission and reabsorption of near-resonant photons whose amplitude decays exponentially from the vicinity of the atom.

587 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023748
20221,590
20211,207
20201,455
20191,643
20181,683