Results 81 to 90 of about 3,684 (206)

Hyperradiance by a stream of phase-correlated atomic dipole pairs traversing a high-Q cavity

Scientific Reports, 2021
Hyperradiance in which radiation rate exceeds that of superradiance has been theoretically investigated in various coherently-coupled emitter-field systems.
Junseok Han, Jinuk Kim, Seung-hoon Oh, Gibeom Son, Junseo Ha, Kyungwon An   +5 more
doaj   +1 more source

Angular momentum localization in oval billiards

, 2001
Angular momentum ceases to be the preferred basis for identifying dynamical localization in an oval billiard at large excentricity. We give reasons for this, and comment on the classical phase-space structure that is encoded in the wave functions of ...
Nockel, Jens U.
core   +3 more sources

Designing Physical Unclonable Functions From Optically Active Materials

Advanced Materials, Volume 37, Issue 49, December 10, 2025.
Assigning unforgeable “fingerprints” to manufactured goods is a key strategy to fight global counterfeiting. Optical physical unclonable functions (PUFs) are chemically generated random patterns of optically active materials serving as unique authenticators.
Maxime Klausen, Junfang Zhang, Molly M. Stevens   +2 more
wiley   +1 more source

Backward wave optical parametric oscillator pumped by subnanosecond microlaser pulses

APL Photonics
Microlaser-pumped subnanosecond pulse duration optical parametric generators have great potential to establish themselves as a compact, simple, and cost-effective option for various tasks that do not require high temporal resolution. However, fundamental
J. Banys, J. Jakutis Neto, A. Žukauskas, V. Pašiškevičius, V. Jarutis, J. Vengelis   +5 more
doaj   +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

Silicone Shell‐Encapsulated Cholesteric Liquid Crystals and Their Colorimetric Characterization in HSV Color Space

Macromolecular Chemistry and Physics, Volume 226, Issue 24, December 19, 2025.
Cholesteric liquid crystal (ChLC) droplets are encapsulated with silicone shells by our novel two‐step dip coating procedure. The shells enable ChLCs to be embedded in hydrogels, leading to a reliable thermochromic sensor in aqueous environment. Digital image colorimetry in HSV color space are utilized to analyze the ordering of ChLCs.
Jueun Lee, Zhitong Lin, Hyun‐Joong Chung   +2 more
wiley   +1 more source

Optical memory based on ultrafast wavelength switching in a bistable microlaser

, 2009
We propose an optical memory cell based on ultrafast wavelength switching in coupled-cavity microlasers, featuring bistability between modes separated by several nanometers.
Atlasov, Atlasov, Dmitry N. Chigrin, Gallo, Hill, Kawaguchi, Kheradmand, Liu, Narducci, Oksanen, Osborne, Otey, Sergei V. Zhukovsky, Vignolini, Zhukovsky, Zhukovsky, Zhukovsky, Zhukovsky   +17 more
core   +1 more source

Monolithic temperature‐insensitive high‐Q Ta2O5 microdisk resonator

Nanophotonics, Volume 14, Issue 27, Page 5475-5483, December 2025.
Abstract We demonstrate a temperature‐insensitive high‐Q tantalum oxide (Ta2O5) microdisk resonator fabricated using electron‐beam lithography and inductively coupled plasma reactive‐ion etching. The microdisks exhibit a loaded Q‐factor of 4.25 × 105 at 1,550 nm, which more than doubles (∼9.3 × 105) following thermal annealing at 600 °C.
Zhen Yang, Zheng Zhang, Peng Cheng, Zhe Long, Qi Cheng, Jiaqi Yang, Yu Lin, Bin Fang, Zhongming Zeng, Zhiping Zhou, Ganapathy Senthil Murugan, Rongping Wang   +11 more
wiley   +1 more source

Chaos-assisted nonresonant optical pumping of quadrupole-deformed microlasers

, 2006
Efficient nonresonant optical pumping of a high-Q scar mode in a two-dimensional quadrupole-deformed microlaser has been demonstrated based on ray and wave chaos. Three-fold enhancement in the lasing power was achieved at a properly chosen pumping angle.
Hai-Woong Lee, Jai-Hyung Lee, Jeong-Bo Shim, Juhee Yang, Kyungwon An, Sang Wook Kim, Sang-Bum Lee, Songky Moon   +7 more
core   +1 more source

Directional Lasing from a 3D Blue Phase Photonic Crystal

Advanced Optical Materials, Volume 13, Issue 33, November 25, 2025.
This work presents the first directional lasing from millimeter‐scale monocrystalline 3D photonic crystals, specifically Blue Phases (BPs), overcoming prior limitations of random lasing in polycrystals. These 3D soft photonic crystals enable highly directional, circularly polarized, mirrorless lasing via resonant polarization modes, offering the ...
Eva Oton, Marcin Muszyński, Konrad Cyprych, Piotr Kapuściński, Przemysław Morawiak, Maria Popławska, Przemysław Oliwa, Jarosław Myśliwiec, Jacek Szczytko, Wiktor Piecek   +9 more
wiley   +1 more source