Results 201 to 210 of about 1,201,915 (262)

Whispering gallery mode diamond resonator

Optics Letters, 2013
We demonstrate a nearly spherical diamond whispering gallery mode resonator with quality factor (Q factor) Q=2.4×10(7) limited by material loss approaching α=4×10(-3) cm(-1). The Q factor does not depend on the wavelength: it is approximately the same at 1319 and 1550 nm. Resonators with this range of Q (
V S, Ilchenko, A M, Bennett, P, Santini, A A, Savchenkov, A B, Matsko, L, Maleki   +5 more
openaire   +2 more sources

pH sensing using whispering gallery modes of a silica hollow bottle resonator.

Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2019
The limitations of electrochemical pH sensors have stimulated the development of optical pH sensing methods. In the method reported here, swellable pH-sensitive polymer particles are deposited on the interior surface of a silica hollow bottle resonator ...
Razvan-Ionut Stoian, B. Lavine, A. T. Rosenberger   +2 more
semanticscholar   +1 more source

Whispering-gallery mode terahertz pulses

Optics Letters, 2002
We 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
openaire   +2 more sources

High-Q Exterior Whispering-Gallery Modes in a Double-Layer Crystalline Microdisk Resonator.

Physical Review Letters, 2019
Exterior whispering-gallery modes (WGMs), whose mode energy is mainly confined outside the microcavity, can achieve large mode overlapping with the ambient environment, as well as a strong electric field and gradient force at the surface.
Yuan-Lin Zheng, Zhi-Wei Fang, Shi-Jie Liu, Ya Cheng, Xian-Feng Chen   +4 more
semanticscholar   +1 more source

Photonic Wavepacket in Whispering-Gallery Modes

The Thirteenth International Conference on Ultrafast Phenomena, 2002
We have generated a wavepacket in optical whispering-gallery modes of a dielectric sphere and observed its round trip motion along the periphery. The data is compared with the calculation based on a Mie scattering theory.
H. Kawashima, T. Hasama
openaire   +1 more source

Dispersion compensation in whispering-gallery modes

Journal of the Optical Society of America A, 2003
We show that manipulation by a spatial profile of the refractive index of a circularly symmetric dielectric cavity results in a novel way of fine tuning frequency separations as well as spatial localizations of high-Q whispering-gallery modes excited in the cavity.
Vladimir S, Ilchenko, Anatoliy A, Savchenkov, Andrey B, Matsko, Lute, Maleki   +3 more
openaire   +2 more sources

Whispering Gallery Mode Microresonators for Biosensing

Advances in Science and Technology, 2012
In the field of sensing, WGM microresonators are receiving a growing interest as optical structures suitable for the realization of miniature sensors with high sensitivity. When properly excited, WGM microresonators are able to strongly confine light, by means of total internal reflection,along the equatorial plane near their spherical surface.
S Soria, S Berneschi, L Pasquardini, L Lunelli, G Nunzi Conti, C Pederzolli, G Righini   +6 more
openaire   +2 more sources

Surface whispering-gallery mode

EPL (Europhysics Letters), 2011
Metamaterials 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
openaire   +1 more source

Enhancing whispering gallery mode biosensing

2013 15th International Conference on Transparent Optical Networks (ICTON), 2013
First, 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.
openaire   +2 more sources

Whispering Gallery Mode Devices

2020
Whispering 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
openaire   +1 more source