Results 161 to 170 of about 29,414 (207)
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Whispering-gallery mode terahertz pulses
Optics Letters, 2002We report what is to our knowledge the first observation of a subpicosecond terahertz (THz) pulse propagating as a superposition of the whispering-gallery modes (WGMs) of a dielectric cylinder. The WGM THz pulses are coupled into and out of a 5-mm-diameter silicon cylinder via a 100-mum -thick, single-mode silicon slab waveguide.
Jiangquan, Zhang, D, Grischkowsky
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Whispering-gallery laser resonators. I. Diffraction of whispering-gallery modes
IEEE Journal of Quantum Electronics, 1991Whispering-gallery optics for use at soft X-ray and extreme ultraviolet wavelengths are examined for their potential applications in laser resonators. An examination is made of beam divergence at the exit of a whispering gallery resonator. The properties of whispering-gallery eigenmodes are reviewed, and the features of their Fourier transforms ...
J.P. Braud, P.L. Hagelstein
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Langatate whispering gallery resonator
Proceedings of the 2001 IEEE International Frequncy Control Symposium and PDA Exhibition (Cat. No.01CH37218), 2002This paper is devoted to basic characteristics of a langatate (LGT) "whispering gallery" dielectric resonator. The main attention is concentrated on frequency-temperature characteristics. Since the principal components of LGT dielectric permittivity vary in opposite directions with temperature it opens a possibility to annul the frequency-temperature ...
D.P. Tsarapkin, N.A. Shtin
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Physics World, 2012
A little-known effect that is ubiquitous throughout physics appears in fields as diverse as astronomy, optics and acoustics. But it all started with a whisper.
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A little-known effect that is ubiquitous throughout physics appears in fields as diverse as astronomy, optics and acoustics. But it all started with a whisper.
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Surface whispering-gallery mode
EPL (Europhysics Letters), 2011Metamaterials can exhibit electromagnetic characteristics beyond those found in nature. In this letter, we demonstrate that Surface Whispering-gallery mode (SWGM) can be generated by coating a microresonator with a layer of metamaterials. Different from WGM, whose waves are mostly confined within the microresonator, the SWGM propagate at the interface ...
J. J. Yang, M. Huang, J. Yu, Y. Z. Lan
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Quantum Electronics, 2002
A review of the theory of the natural waves (eigen-modes) in a dielectric sphere is presented. A special attention is paid to the eigenmodes with large radial and azimuthal indices, the so-called whispering-gallery modes. The experimental results of the spectroscopic study of modes in a dielectric sphere are reported.
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A review of the theory of the natural waves (eigen-modes) in a dielectric sphere is presented. A special attention is paid to the eigenmodes with large radial and azimuthal indices, the so-called whispering-gallery modes. The experimental results of the spectroscopic study of modes in a dielectric sphere are reported.
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Enhancing whispering gallery mode biosensing
2013 15th International Conference on Transparent Optical Networks (ICTON), 2013First, years of work on advancing the device physics and engineering of WGM biosensors has improved the ultimate physical detection limits of WGM transducers, yet the limits for DNA detection by hybridization has plateaued. Molecular recognition of DNA at a surface limits the biosensors' sensitivity, specificity, and reusability.
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Whispering gallery microcavity lasers
Laser & Photonics Reviews, 2012AbstractWhispering gallery mode (WGM) optical microresonators have attracted intense interests in the past decades. The combination of high quality factors (Q) and small mode volumes of modes in WGM resonators significantly enhances the light‐matter interactions, making them excellent cavities for achieving low threshold and narrow linewidth lasers. In
Lina He, Şahin Kaya Özdemir, Lan Yang
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Whispering Gallery Mode Devices
2020Whispering gallery mode (WGM) resonators and lately photonic crystal resonator based devices are attractive due to their potential applications in photonics and recently in biophotonics as is described in the previous chapter. Applications which have been realized include for example lasers, filters, optical switches and biosensors.
Dominik Gerhard Rabus, Cinzia Sada
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Optical whispering-gallery microresonators
SPIE Proceedings, 1994Quality factor 2.5 X 109 at the wavelength (lambda) equals 0.63 micrometers is reported in approximately 100 micrometers spherical resonators of fused silica with whispering-gallery modes (equivalent finesse F equals 2.5 X 106). Quality-factor 3 X 107 and effective thermal tunability of modes (up to 0.1%) is demonstrated in whispering-gallery ...
Vladimir B. Braginsky +2 more
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