Results 181 to 190 of about 2,161,160 (209)
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Whispering gallery modes in coated silica microspheres
SPIE Proceedings, 2012Silica microspheres were made by melting the tip of a standard telecom fiber and were coated with a 70SiO2 - 30 HfO2 sol-gel derived glass activated by 0.3 mol % of Er3+ ions. The samples were coated using a dip coating apparatus. The thickness of the coating was estimated to be around 1 μm.
D. Ristic +7 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 resonators for microlasers and microsensors
2005In dielectric spheres light can be guided through high-Q whispering-gallery-modes (WGMs) with an unique combination of strong temporal and spatial confinement of light. Glass microspheres are then of interest for a large number of applications including compact lasers sources and biological sensing.
G C Righini +6 more
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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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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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Plasmon-enhanced whispering gallery mode biosensing
2012 Photonics Global Conference (PGC), 2012Whispering gallery mode (WGM) biosensors derive their unprecedented sensitivity for label-free detection of biomolecules from the high-quality (Q) factor of an optical resonance phenomenon. Plasmonic excitations in metal nanostructures which are able to localize the WGM field at the target binding site can further enhance sensitivity by local electric ...
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Plasmonic enhancement of a whispering-gallery-mode biosensor for single nanoparticle detection
Applied Physics Letters, 2011Stephen Holler, S Arnold
exaly