Results 91 to 100 of about 683,541 (259)

A Faster Distributed Single-Source Shortest Paths Algorithm

, 2019
We devise new algorithms for the single-source shortest paths (SSSP) problem with non-negative edge weights in the CONGEST model of distributed computing.
Forster, Sebastian, Nanongkai, Danupon
core   +1 more source

How to Manufacture Photonic Metamaterials

Advanced Materials Technologies, EarlyView.
Metamaterials boast applications such as invisibility and “hyperlenses” with resolution beyond the diffraction limit, but these applications haven’t been exploited in earnest and the market for them hasn’t grown much likely because facile and economical methods for fabricating them without defect has not emerged.
Apurba Paul, Gregory Timp
wiley   +1 more source

An Efficient Quantum Algorithm for some Instances of the Group Isomorphism Problem [PDF]

, 2010
In this paper we consider the problem of testing whether two finite groups are isomorphic. Whereas the case where both groups are abelian is well understood and can be solved efficiently, very little is known about the complexity of isomorphism testing ...
Gall, François Le
core   +2 more sources

Fiber Bragg Gratings with Micro‐Engineered Temperature Coefficients

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
Fiber Bragg gratings (FBGs) are intrinsically responsive to temperature and strain simultaneously. In this research, low‐loss FBGs with micro‐engineered temperature coefficients are fabricated, utilizing refractive index liquid‐filled microchannels in the cladding.
Zipei Song, Mohan Wang, Frank P. Payne, Patrick S. Salter, Tongyu Liu, Steve J. Elston, Martin J. Booth, Stephen M. Morris, Julian A. J. Fells   +8 more
wiley   +1 more source

Ellipticity‐Controlled Exceptional Points and Cross‐Polarized Phase Singularities in Multi‐Layer Silicon Guided Mode Resonant Metasurfaces

Advanced Optical Materials, EarlyView.
Omni‐polarizers that pull all input polarization states to an elliptical or linear polarization can be made using highly resonant bi‐layer metasurfaces. The ellipticity of the selected polarization can be controlled by choosing the layer separation.
Ben Goldberg, Shuang Zhang, Mark Lawrence   +2 more
wiley   +1 more source

Submicrosecond Electric Switching of Large Birefringence in the Isotropic Phase of Ferroelectric Nematics

Advanced Optical Materials, EarlyView.
We demonstrate ultra‐fast and efficient electro‐optical switching using the isotropic phase of ferroelectric nematic liquid crystals. A moderate electric field induces a transition to polar ferroelectric nematic order, producing large field‐induced birefringence with sub‐microsecond switch‐on and switch‐off times. This advance enables new opportunities
Kamal Thapa, Sathyanarayana Paladugu, Oleg D. Lavrentovich   +2 more
wiley   +1 more source

Wadge Degrees of $\omega$-Languages of Petri Nets

, 2018
We prove that $\omega$-languages of (non-deterministic) Petri nets and $\omega$-languages of (non-deterministic) Turing machines have the same topological complexity: the Borel and Wadge hierarchies of the class of $\omega$-languages of (non ...
Finkel, Olivier
core   +1 more source

Single‐Emitter White OLEDs via Microcavity Spectral Engineering

Advanced Optical Materials, EarlyView.
This research introduces a simple, eco‐friendly approach for fabricating ITO‐free white OLEDs by converting blue emission into broadband white light using microcavity engineering. The emitted color can be adjusted by changing the cavity thickness, offering a scalable method ideal for sustainable lighting applications Abstract White organic light ...
Manish Kumar, Arpan Dutta, Hassan A. Qureshi, Michael A. Papachatzakis, Ahmed Gaber Abdelmagid, Konstantinos S. Daskalakis   +5 more
wiley   +1 more source

A Trade‐Off between Pulse Energy and Stability in Seeded Free‐Electron Lasers

Advanced Photonics Research, EarlyView.
Seeded free‐electron lasers (FELs) require balancing competing factors for optimal performance. This work analyzes how dispersion strength influences output in high‐gain harmonic generation. Results reveal a trade‐off: maximizing pulse energy often comes at the cost of reduced stability and vice versa.
Li Zeng, Huaiqian Yi, Xiaofan Wang, Chao Feng, Weiqing Zhang   +4 more
wiley   +1 more source

High‐Resolution On‐Chip Digitally Tunable Spectrometer Based on Double‐Cascaded Ring Resonators

Advanced Photonics Research, EarlyView.
An integrated spectrometer is here presented, based on two cascaded ring resonators covered with a phase change material. The Vernier architecture is implemented allowing for a digital scan of wavelengths. Resolution smaller than 0.1 nm can be achieved, together with a footprint ≈0.03 mm2 and a bandwidth of the order of tens of nanometers.
Carla Maria Coppola, Martino De Carlo, Francesco De Leonardis, Vittorio M. N. Passaro   +3 more
wiley   +1 more source