Results 51 to 60 of about 8,784 (238)
Trapping photons with optical black hole
Light: Science & Applications, 2023 An optical black-hole cavity based on transformation optics enables Q-factor enhancement and strong field confinement, by eliminating the intrinsic radiation loss of the conventional whispering-gallery modes, holding potential for applications in energy ...
You-Ling Chen, Qi-Tao Cao, Yun-Feng Xiao
doaj +1 more source
Microlasers Made Entirely from Edible Substances
Advanced Optical Materials, EarlyView.Several types of microlasers made completely out of edible substances are developed. They can be embedded directly into edible products and enable the sensing of various parameters, including sugar concentration, pH, the presence of bacteria, and exposure to too‐high temperatures.
Abdur Rehman Anwar +4 more
wiley +1 more source
Observations of interior whispering gallery modes in asymmetric optical resonators with rational caustics [PDF]
, 2007 We propose asymmetric resonant cavities with rational caustics and experimentally demonstrate interior whispering gallery modes in monolithic silicon mesoscopic microcavities. These microcavities demonstrate unique robustness of cavity quality factor (Q) against roughness Rayleigh scattering.
arxiv +1 more source
Sensors, 2017 Sensitive and rapid label-free biological and chemical sensors are needed for a wide variety of applications including early disease diagnosis and prognosis, the monitoring of food and water quality, as well as the detection of bacteria and viruses for ...
Judith Su
doaj +1 more source
Carbonized Polymer Dots‐Based Spectrally Adaptable Photonic Microbarcodes
Advanced Optical Materials, EarlyView.This study explores spectrally tunable photonics barcodes using carbonized polymer dots (CPDs) based on whispering gallery mode (WGM) photoluminescence. CPDs offer wavelength‐dependent emission from visible to near‐infrared (NIR), thereby enabling variable WGM emissions.
Barun Kumar Barman +2 more
wiley +1 more source
Circle-shaped Transformation Cavity via Center-Shift Möbius Transfomation [PDF]
arXiv, 2020 Circle-shaped transformation cavities of shifted center are the most simple transformation cavities in the sense that they have only spatial index variation without boundary shape deformation. For these cavities, we analyze the characteristics of conformal whispering gallery modes according to center-shift coordinate transformation.
arxiv
CXII. The problem of the whispering gallery [PDF]
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1910 n ...
openaire +2 more sources
Microfluidic flowmeter based on a liquid crystal-filled nested capillary
Communications EngineeringMicrofluidic flowmeters are a powerful and highly accurate tool, enabling precise monitoring and measurements of flows of gases and fluids in a range of applications.
Zhe Wang +7 more
doaj +1 more source
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
Nihon Kikai Gakkai ronbunshu, 2019 A sphere is a frequently used shape as a reference of calibration for 3-dimensional measurement instruments because of its isotropic shape. It is demanded to measure the diameter of the reference sphere with high accuracy.
Masaki MICHIHATA +4 more
doaj +1 more source