Results 171 to 180 of about 29,414 (207)

2D whispering gallery vs. 3D whispering cave

SPIE Proceedings, 2008
Lord Rayleigh's 2 dimensional (2D) whispering gallery mode (WGM) is based upon 2D total internal reflection (TIR) while 3D whispering cave mode (WCM) is based upon 3D TIR. 3D WCM is however irreducible to 2D WGM: The 2D WGM is confined to a thin microdisk with a cylindrical symmetry solvable via Bessel function analysis while the 3D WCM is confined ...
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Whispering Gallery Modes Microcavity

2021
This chapter introduces the origin of the Whispering-gallery modes (WGM) microcavities. The WGM microcavities have independent optical and mechanical properties. Several terminologies, such as optical or mechanical quality factor, used in cavities are introduced. The mode characterization and field distribution of the microsphere is discussed.
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Hollow whispering gallery resonators

Laser Resonators, Microresonators, and Beam Control XX, 2018
In recent years, whispering gallery mode (WGM) devices have extended their functionality across a number of research fields from photonics device development to sensing applications. Here, we will discuss some such recent applications using ultrahigh Q-factor hollow resonators fabricated from pretapered glass capillary.
Ramgopal Madugani, Sho Kasumie, Yong Yang, Fuchuan Lei, Jonathan M. Ward, Síle Nic Chormaic   +5 more
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Nonlinear Whispering Gallery Modes

Physical Review Letters, 1999
The stationary lasing of the modes in a microdisk is formulated as a nonlinear eigenvalue problem for a nonlinear Maxwell equation. It is shown that whispering gallery modes can be obtained as stationary lasing solutions with finite pumping thresholds.
Takahisa Harayama, Peter Davis, Kensuke S. Ikeda   +2 more
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Spiral whispering-gallery resonators

SPIE Proceedings, 2005
High-Q whispering-gallery 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.
Evgenii E. Narimanov, Viktor A. Podolskiy   +1 more
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Whispering Gallery Pulse Compressor

AIP Conference Proceedings, 2004
A barrel‐like cavity resonant at a whispering gallery mode is known as capable to provide a SLED‐like rf pulse compression. To enhance the power handling capacity of the compressor, we propose to use a coupler based on a wave tunneling through a continuous slot. A modeling low power 11.4 GHz experiment proved to be consistent with theory. A preliminary
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Polymeric whispering gallery mode micro-resonators

2016 IEEE Photonics Conference (IPC), 2016
We 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, Siegle, T, Krammer, S, Flatae, AM, Schierle, S, Richter, B, Nocentini, S, Parmeggiani, C, Zeng, H, Burresi, M, Wiersma, DS, Wondimu, SF, Schuch, P, Koos, C   +13 more
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Crystal quartz optical whispering-gallery resonators

Optics Letters, 2008
A quality factor exceeding 5x10(9) is obtained in whispering-gallery mode (WGM) resonators fabricated of crystalline quartz. We observe significant electrical tunability of WGMs in x-cut resonators and demonstrate an electro-optic modulator with a submegahertz passband at 12 GHz.
Vladimir S, Ilchenko, Anatoliy A, Savchenkov, Jerry, Byrd, Iouri, Solomatine, Andrey B, Matsko, David, Seidel, Lute, Maleki   +6 more
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Whispering Gallery Mode Biosensor

2010
None 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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Sapphire Whispering Gallery Thermometer

International Journal of Thermophysics, 2007
An innovative sapphire whispering gallery thermometer (SWGT) is being explored at the National Institute of Standards and Technology (NIST) as a potential replacement for a standard platinum resistance thermometer (SPRT) for industrial applications that require measurement uncertainties of ≤ 10 mK.
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