Results 91 to 100 of about 15,725 (240)

Dielectric tuning and coupling of whispering gallery modes using an anisotropic prism

, 2016
Optical whispering gallery mode (WGM) resonators are a powerful and versatile tool used in many branches of science. Fine tuning of the central frequency and line width of individual resonances is however desirable in a number of applications including ...
Foreman, Matthew R., Leuchs, Gerd, Schwefel, Harald G. L., Sedlmeir, Florian   +3 more
core   +1 more source

Chiral Metasurfaces with Multidimensional Tunability for Optical Chiral States

Advanced Optical Materials, Volume 13, Issue 36, December 19, 2025.
A novel bilayer perovskite chiral metasurface enables tunable transitions between BIC‐associated vortex centres and circularly polarized states via rotational symmetry control. Breaking rotational symmetry and applying in situ rotation to the upper layer allows precise, omnidirectional tuning of C points in momentum space. This evolution forms a Möbius‐
Dayang Lin, Abbas Ghaffari, Qing Gu
wiley   +1 more source

Germanium microlasers on metallic pedestals

APL Photonics, 2018
Strain engineering is a powerful approach in micro- and optoelectronics to enhance carrier mobility, tune the bandgap of heterostructures, or break lattice symmetry for nonlinear optics.
A. Elbaz, M. El Kurdi, A. Aassime, S. Sauvage, X. Checoury, I. Sagnes, C. Baudot, F. Boeuf, P. Boucaud   +8 more
doaj   +1 more source

Quantum Spectra and Wave Functions in Terms of Periodic Orbits for Weakly Chaotic Systems

, 2000
Special quantum states exist which are quasiclassical quantizations of regions of phase space that are weakly chaotic. In a weakly chaotic region, the orbits are quite regular and remain in the region for some time before escaping and manifesting ...
Narevich, R., Prange, R. E., Zaitsev, Oleg   +2 more
core   +1 more source

Second‐harmonic generation in NbOI2‐integrated silicon nitride microdisk resonators

Nanophotonics, Volume 14, Issue 27, Page 5337-5345, December 2025.
Abstract In recent years, two‐dimensional (2D) niobium oxide dihalides (e.g., NbOI2) have garnered significant research interest in nonlinear photonics due to their prominent second‐order nonlinear optical properties. Integrating these materials with high‐quality‐factor optical microcavities represents a crucial approach for developing high‐performance
Ning Liu, Qiang Liu, Yutian Lin, Zhihong Zhu, Ken Liu   +4 more
wiley   +1 more source

Numerical Simulation of Mid-Infrared Optical Frequency Comb Generation in Chalcogenide As₂S₃ Microbubble Resonators

Photonics, 2019
Mid-infrared optical frequency comb generation in whispering gallery mode microresonators attracts significant interest. Chalcogenide glass microresonators are good candidates for operating in the mid-infrared range.
Elena A. Anashkina, Maria P. Marisova, Arseny A. Sorokin, Alexey V. Andrianov   +3 more
doaj   +1 more source

Numerical Aperture Dependence of Mie Modes in Low Refractive Index Particles and Enhanced Collection Using Metallic Substrates

Advanced Optical Materials, Volume 13, Issue 32, November 14, 2025.
The influence of numerical aperture (NA) on the detection of Mie resonances in dielectric spheres is demonstrated. Experiments and simulations reveal that varying NA modifies mode amplitudes and linewidths. Furthermore, metallic substrates redirect modes toward low angles, enabling efficient mode detection with low NA optics and reducing perturbation ...
Sunny Tiwari, Tristan Farrow
wiley   +1 more source

On‐Chip Sensing with Slow Light Topological Cavities

Advanced Optical Materials, Volume 13, Issue 32, November 14, 2025.
A valley photonic crystal slow‐light sensor is demonstrated with up to 1.76‐fold shorter round‐trip path lengths than non‐slow‐light designs. The stronger light‐matter interactions in the slow‐light cavity sensor result in up to threefold higher sensitivity compared to the non‐slow‐light cavity sensor.
Bodhan Chakraborty, Wenhao Wang, Nikhil Navaratna, Yi Ji Tan, Ranjan Singh   +4 more
wiley   +1 more source

Simulation and Analysis of a Metamaterial Sensor Based on a Microring Resonator

Sensors, 2011
Metamaterials are artificial media structured on a size scale smaller than the wavelength of external stimuli, that may provide novel tools to significantly enhance the sensitivity and resolution of the sensors.
Yaozhong Lan, Shujuan Mu, Sun Jun, Jingjing Yang, Ming Huang   +4 more
doaj   +1 more source

Microring quantum cascade surface emitting lasers

APL Photonics
We miniaturize a vertically coupled in-plane whispering gallery mode cavity incorporating a quantum cascade gain medium, aiming to realize the mid-infrared counterpart to the vertical cavity surface emitting laser.
David Stark, Mattias Beck, Jérôme Faist   +2 more
doaj   +1 more source