Results 201 to 210 of about 24,690 (249)

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

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
openaire   +3 more sources

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.
openaire   +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

White-light whispering gallery mode resonators

Optics Letters, 2006
We 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, Andrey B, Matsko, Lute, Maleki   +2 more
openaire   +2 more sources

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

Aptamer Based Whispering Gallery Mode Biosensor

2013
Whispering 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, Pasquardini Laura, Barucci Andrea, Berneschi Simone, Cosi Franco, Lunelli Lorenzo, NunziConti Gualtiero Nunzi, Pederzolli Cecilia   +7 more
openaire   +3 more sources

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
openaire   +1 more source

Whispering-gallery mode microdisk lasers

Applied Physics Letters, 1992
A new microlaser design based on the high-reflectivity whispering-gallery modes around the edge of a thin semiconductor microdisk is described and initial experimental results are presented. Optical confinement within the thin disk plane results in a microresonator with potential for single-mode, ultralow threshold lasers.
S. L. McCall, A. F. J. Levi, R. E. Slusher, S. J. Pearton, R. A. Logan   +4 more
openaire   +1 more source