Results 311 to 320 of about 67,905 (349)
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Semiconductor Nanowire Ring Resonator Laser
Physical Review Letters, 2006Nanowires of the wide band-gap semiconductor gallium nitride (GaN) have been shown to act as room-temperature uv lasers. Recent advances in nanomanipulation have made it possible to modify the shape of these structures from a linear to a pseudoring conformation.
Peter J, Pauzauskie +2 more
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Series coupled microwave ring resonators
2011 IEEE International Conference on System Engineering and Technology, 2011An odd number of one-wavelength ring resonators are proposed to be directly series-connected along a quarter-wavelength of their sides to exhibit a bandpass response with very high rejection level. As each ring presents a dual-mode response, the order of the overall bandpass response will be equal to two times the number of rings being used ...
Mohd Salleh, M.K. +3 more
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Resonant Frequency of Slotted Ring Resonator
30th European Microwave Conference, 2000, 2000The slotted ring resonator has some promising features for the realisation of compact microwave filters. For the first time, using the finite difference technique and conformal mapping method, the effects of geometrical parameters (i.e.: the resonator length, inner radius, gap width and wall thickness) on the resonant frequency of this resonator, are ...
Dariush Mirshekar-Syahkal +2 more
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Athermal Silicon Ring Resonators
Integrated Photonics Research, Silicon and Nanophotonics and Photonics in Switching, 2010We demonstrate athermal amorphous Si (a-Si) ring resonators using a top polymer cladding. We observe near complete thermo-optic (TO) compensation, and a temperature dependent resonant wavelength shift (TDWS) as low as 0.5 pm/K is achieved.
Vivek Raghunathan +4 more
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IEEE Journal of Quantum Electronics, 1973
An unstable ring resonator has been studied, both theoretically and experimentally; quasi-traveling-wave operation is obtained with a high ratio of the powers of the two opposite rotating waves and with diffraction-limited output beams.
P. Pozzo +3 more
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An unstable ring resonator has been studied, both theoretically and experimentally; quasi-traveling-wave operation is obtained with a high ratio of the powers of the two opposite rotating waves and with diffraction-limited output beams.
P. Pozzo +3 more
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Photorefractive coupling in ring resonators
Applied Optics, 1984transmissivities as well as relative phase shifts. These In this paper, the author analyzes the coupling of the results are then used to calculate the splitting in the two oppositely directed traveling waves in a ring reso- oscillation frequency and intensity of the ring laser. nator due to the photorefractive effect.
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Optical Microtube Ring Resonators
AIP Conference Proceedings, 2007In this work, we demonstrate that semiconductor microtubes fabricated by utilizing the self‐rolling mechanism of epitaxially grown strained bilayers can act as optical ring resonators. The mode structure is probed by the photoluminescence of an optically active material, i.e. self‐assembled quantum dots, embedded inside the microtube wall.
T. Kipp +4 more
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Journal of Lightwave Technology, 2000
We have studied structures where a concentric ring with an index higher than that of the cladding index is added to a conventional fiber core. The structure supports at least one additional symmetric mode with substantial power in the ring, besides the normal mode in the core.
null Lian Dong +3 more
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We have studied structures where a concentric ring with an index higher than that of the cladding index is added to a conventional fiber core. The structure supports at least one additional symmetric mode with substantial power in the ring, besides the normal mode in the core.
null Lian Dong +3 more
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Subwavelength nanoplasmonic ring resonators
Journal of the Optical Society of America B, 2005Electromagnetic ring resonators composed of noncontacting metal nanoparticles are analyzed as building blocks of future plasmonic optical systems. Closed-form expressions for the electromagnetic modes are obtained, and conditions under which such structures exhibit low or high radiative losses are found.
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