Results 31 to 40 of about 5,350 (226)
Carrier-induced refractive index change observed by a whispering gallery mode shift in GaN microrods
New Journal of Physics, 2015 Vertical oriented GaN microrods were grown by metal-organic vapor phase epitaxy with four different n-type carrier concentration sections above 10 ^19 cm ^−3 along the c -axis.
C Tessarek +4 more
doaj +1 more source
Effect of tapering diameters with microbottle resonator for formaldehyde (CH2O) liquid sensing
Sensing and Bio-Sensing Research, 2019 In this study, we demonstrate the effect of the microbottle resonator (MBR) based on whispering gallery modes (WGMs) with two different diameters of tapered microfibre and its experiment with the formaldehyde (CH2O) liquid sensor. The MBR with the bottle
Md Ashadi Md Johari +8 more
doaj +1 more source
Review of biosensing with whispering-gallery mode lasers [PDF]
Light: Science & Applications, 2021 AbstractLasers are the pillars of modern optics and sensing. Microlasers based on whispering-gallery modes (WGMs) are miniature in size and have excellent lasing characteristics suitable for biosensing. WGM lasers have been used for label-free detection of single virus particles, detection of molecular electrostatic changes at biointerfaces, and ...
N. A. Toropov +5 more
openaire +6 more sources
Spherical whispering‐gallery‐mode microresonators
Laser & Photonics Reviews, 2010 AbstractWhispering‐gallery modes (WGM) on a spherical surface were first described by Lord Rayleigh at the beginning of the last century, but only after the invention of laser did they start to have some scientific relevance and only during the last two decades there has been a substantial move towards real devices and practical applications.
A Chiasera +8 more
openaire +2 more sources
Acoustic whispering-gallery modes in optomechanical shells
New Journal of Physics, 2012 We numerically calculate the forms and frequencies of mechanical whispering-gallery modes in silica shells. Such modes were recently experimentally observed in water-filled optomechanical resonators, which constitute a bridge between optomechanics and ...
Gaurav Bahl, Xudong Fan, Tal Carmon
doaj +1 more source
Whispering-gallery modes promote enhanced optical backflow in a perforated dielectric microsphere
, 2021 Optical energy flow inside a dielectric microsphere is usually codirected with the optical wavevector. At the same time, if the optical field in a microsphere is in resonance with one of the high-quality spatial eigenmodes (whispering-gallery modes ...
Oleg V. Minin (3943118) +2 more
core +1 more source
A scatterer‐assisted whispering‐gallery‐mode microprobe
Nanophotonics, 2018 Abstract A fiber‐based whispering‐gallery‐mode (WGM) microprobe, combining both the high optical field enhancement of the WGMs and the compact structure of the optical fiber, is highly desired for sensing and imaging. Here we report a WGM microsphere resonator coupled to a single‐mode fiber interfaced by a graded‐index lens.
Shu Fangjie +3 more
openaire +3 more sources
Modal domains and selectivity in large square lasers
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsModes in square resonators have C4v symmetry. A special set of modes in these resonators have odd parities and behave like whispering gallery modes. These quasi-whispering gallery modes have high quality factors and exhibit interesting features.
Liming Liu +2 more
doaj +1 more source
IEEE Photonics Journal, 2021 We examine moderate CO2 laser heating as a method of forming negative effective radius variations in conventional optical fiber. Fiber samples were subjected to focused CO2 laser radiation in the form of 100 ms pulses with power 0.36 to 1.3 W and ...
Dmitry V. Krisanov +2 more
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Ultrahigh–Q Microtoroid On-Chip Resonators for Low Threshold Microlasers [PDF]
, 2006 Recently demonstrated silica toroidal microcavities, as on-chip resonant cavities, become one of the most promising laser resonators due to their exceptional ability to confine optical energy temporarily and spatially (high Q-factor and small mode volume)
Min, Bumki
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