Results 181 to 190 of about 19,826 (214)
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Whispering Gallery Modes at THz
Advanced Optical Materials, 2019AbstractWhispering gallery modes (WGM) offer strong confinement of electromagnetic radiation to specific resonances supported by the geometry of the resonator. In fact, highest ever quality factors are reported in optical and near‐infrared WGMs along with their applications.
Shriganesh S. Prabhu, Venu Gopal Achanta
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Nonlinear whispering-gallery modes in a microellipse cavity
Optics Letters, 2004We study theoretically the effect of deformed microelliptical cavities on lasing characteristics. We show that the transition of stationary lasing states from unidirectional rotational waves to a mixture of clockwise and anticlockwise rotational waves occurs when the shape of a disk is deformed to that of an ellipse.
Satoshi, Sunada +2 more
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Whispering gallery mode profiles in a coated microsphere
The European Physical Journal Special Topics, 2014The properties of whispering gallery modes (WGM) of a microsphere can be tailored by coating the resonator with a thin film. If the coating has a higher refractive index than the microsphere core, the resulting structure will have a configuration which has similarities both with a classical WGM resonator and with a planar waveguide.
Davor Ristic +9 more
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Whispering gallery mode microresonators: Fundamentals and applications
La Rivista del Nuovo Cimento, 2011Confinement of light into small volumes has become an essential requirement for photonic devices; examples of this trend are provided by optical fibers, integrated optical circuits, semiconductor lasers, and photonic crystals. Optical dielectric resonators supporting Whispering Gallery Modes (WGMs) represent another class of cavity devices with ...
GC Righini +6 more
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Whispering Gallery Mode Biosensor
2010None of civilization’s socio-political catastrophes (e.g. world wars) have caused an equivalent destructive effect on the world’s population as biological pandemics [1]. Exponentially growing pathogens are difficult to contain and eliminate unless they can be detected early on.
S. Arnold, S. I. Shopova
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Freestanding Whispering-Gallery Mode microdisk resonator
The 8th Annual IEEE International Conference on Nano/Micro Engineered and Molecular Systems, 2013This article proposes a high-Q value Whispering-Gallery Mode (WGM) microdisk resonator, which is surrounded by photonic crystal with square lattice. Finite element method (FEM) is performed to model the microdisk resonator, and an ultrahigh quality factor (Q) value of 1.37×108 can be achieved at the wavelength of 1435.4nm.
Zheng Shi +4 more
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Whispering gallery mode microresonators as polarization converters
Optics Letters, 2007A ring resonator coupled to a waveguide can be used as a highly efficient polarization converter when the input is properly polarized. We model this phenomenon and verify the predictions with a demonstration of very efficient polarization conversion (>90%) on a silica microsphere coupled to a tapered optical fiber.
Pablo, Bianucci +4 more
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Polymeric whispering gallery mode micro-resonators
2016 IEEE Photonics Conference (IPC), 2016We review fabrication and optics of polymeric high-Q whispering gallery mode resonators. They are employed as bio-sensors featuring selective parallel functionalization of arrays and integration into lab-on-a-chip systems. Liquid crystalline elastomers enable wide tunability of resonances.
Kalt, H +13 more
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Aptamer Based Whispering Gallery Mode Biosensor
2013Whispering gallery mode resonators (WGMR), in the form of optical silica microspheres, have been recently proposed as an efficient tool for the realisation of optical biosensors. A crucial step for producing reliable biosensors is their surface functionalization. In this work we report a functionalization process based on the use of a DNA aptamer. Also
Soria Silvia +7 more
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White-light whispering gallery mode resonators
Optics Letters, 2006We propose theoretically and demonstrate experimentally white-light whispering gallery mode resonators. These resonators have essentially a continuous modal spectrum accompanied by ultrahigh-Q frequency-independent quality factors. Applications of the resonators for ringdown spectroscopy and light modulation are discussed.
Anatoliy A, Savchenkov +2 more
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