Results 51 to 60 of about 140,562 (225)

On‐Chip Active Supercoupled Topological Cavity

Advanced Materials, EarlyView.
The on‐chip supercoupled cavity device is demonstrated realizing a record cavity excitation distance exceeding three wavelengths, leveraging the valley‐conserved supercoupling mechanism in the valley Hall topological system. This optothermal tunable design enables new degrees of freedom for supercoupled photonic cavities in mux‐demux, lasers, sensors ...
Ridong Jia, Wenhao Wang, Yi Ji Tan, Zhonglei Shen, Thomas Caiwei Tan, Zhonghua Gu, Prakash Pitchappa, Ranjan Singh   +7 more
wiley   +1 more source

Travelling-wave whispering gallery resonance sensor in millimetre-wave range

Electronics Letters, 2008
A high sensitivity sensor with a simple structure is presented for analysis of (bio)chemicals in liquid or solution form. The proposed technique is based on the travelling-wave whispering gallery resonance perturbation method in the millimetre-wave range. The resonance modes are launched inside a dielectric disk through coupling into a dielectric image
Mohammad Neshat, Safieddin Safavi-Naeini, Suren Gigoyan, Daryoosh Saeedkia   +3 more
openaire   +2 more sources

Continuous-wave electron-light interaction in high-Q whispering gallery microresonators

2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC), 2021
Achieving strong coupling of electron beams with single photons and harnessing their potential entanglement promises advancemenets in quantum optics with free-electron, merging spectroscopy of individual quantum systems with the nanoscale spatial resolution available in electron microscopes.
Henke, Jan-Wilke, Raja, Arslan Sajid, Feist, Armin, Liu, Junqiu, Arend, Germaine, Huang, Guanhao, Kappert, Fee Jasmin, Wang, Rui Ning, Pan, Jiahe, Kfir, Ofer, Ropers, Claus, Kippenberg, Tobias J.   +11 more
openaire   +4 more sources

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, Maruša Mur, Georgia Michailidou, Dimitrios N. Bikiaris, Matjaž Humar   +4 more
wiley   +1 more source

Dominant Loss Mechanisms of Whispering Gallery Mode RF-MEMS Resonators with Wide Frequency Coverage

Sensors, 2020
This work investigates the dominant energy dissipations of the multi-frequency whispering gallery mode (WGM) resonators to provide an insight into the loss mechanisms of the devices.
Zeji Chen, Qianqian Jia, Wenli Liu, Quan Yuan, Yinfang Zhu, Jinling Yang, Fuhua Yang   +6 more
doaj   +1 more source

Interaction of the elementary waves for shallow water equations with discontinuous topography [PDF]

arXiv, 2021
The Riemann problem of one dimensional shallow water equations with discontinuous topography has been constructed recently. The elementary waves include shock waves, rarefaction waves, and the stationary wave. The stationary wave appears when the water depth changes, especially when there exists a bottom step.
arxiv  

Excitation‐Wavelength‐Tunable Lasing in Individual Quantum Dot Superparticles

Advanced Optical Materials, EarlyView.
Mesoscale superparticles assembled from CdSe quantum dots are shown to behave as microlasers with emission properties that can be tuned by changing the excitation wavelength. Abstract Microcavities enable precise control over light‐matter interactions, supporting a wide range of applications in photonics and optoelectronics.
Marco Reale, Pietro Castronovo, Marco Cannas, Emanuele Marino, Alice Sciortino, Fabrizio Messina   +5 more
wiley   +1 more source

Propagation of Wave Packets in Dispersive Media [PDF]

arXiv, 2020
The propagation and refraction of waves in dispersive media are considered. A primary objective is to determine whether waves refract as monochromatic waves by Snell's law with phase velocity or as wave packets. The refraction of wave packets requires two refraction laws.
arxiv  

Directional Whispering Gallery Mode in Microring Lasers Enabled by Tilted Azimuthal Gratings

Advanced Photonics Research, EarlyView.
The chiral light propagation in microring lasers with active cladding, enabled by tilted azimuthal gratings, is illustrated. The symmetry of the whispering gallery mode is disrupted due to scattering losses that are determined by the tilted angle, resulting in distinct clockwise and counterclockwise light propagation, and enabling controlled chirality ...
Jinghan Chen, Adrian Abazi, Frederik van Schoonhoven, Yuji Oki, Yohei Yamamoto, Carsten Schuck, Hiroaki Yoshioka   +6 more
wiley   +1 more source

COUPLING RADIATION LOSS IN THE MIRROR DIELECTRIC DISK RESONATOR. PART 2. MISMATCHED WAVEGUIDE COUPLING [PDF]

Радиофизика и электроника, 2015
The coupling radiation loss of the whispering gallery mode mirror dielectric disk resonator (MDDR) with mismatched waveguides was researched. The findings are of particular interest to the developers of MDDR solid-state oscillators where semi-conductor ...
V. V. Glamazdin, M. P. Natarov, V. N. Skresanov, A. I. Shubnyj   +3 more
doaj   +1 more source