Results 81 to 90 of about 3,537,154 (243)

Sub‐1 ms Optoelectronic Synapse Based on {ZnCdO/ZnO} Multilayer Structure for High‐Speed Neuromorphic Vision Systems

Advanced Functional Materials, EarlyView.
Eu‐doped {ZnCdO/ZnO} structures grown on Si are developed, showcasing dual‐functionality controlled by europium doping. While high europium concentration transforms the device into an ultrafast, self‐powered photodetector, low‐doped structures can be used as an optoelectronic synapse.
Igor Perlikowski, Eunika Zielony, Adrian Kaim, Ewa Przeździecka   +3 more
wiley   +1 more source

Carrier-envelope-phase Dependence in Spontaneous Parametric Down-Conversion

The influence of the carrier-envelope phase of a femtosecond pump laser pulse on spontaneous parametric down-conversion is investigated. We show that the coincidence rates and joint spectrum intensity of the generated entangled biphotons are modified.
Sanjit Karmakar, Chen-Ting Liao
core   +1 more source

Spectral properties of entangled photon pairs generated via frequency-degenerate type-I spontaneous parametric down-conversion

, 2018
We report the complete measurement of the spectral properties of entangled photon pairs generated via frequency-degenerate type-I spontaneous parametric down-conversion pumped by a cw laser in both the collinear and the noncollinear regimes.
Baek, SY, Kim, YH
core   +1 more source

A New Strategy for Creating Quantum Light Emitters Via Post‐Growth Hydrogen‐Ion Irradiation of III‐V Nanowires

Advanced Functional Materials, EarlyView.
A post‐growth method is demonstrated to realize energy‐tunable quantum emitters in GaAs/GaAsN/GaAs core–multishell nanowires on a Si substrate. By combining the N‐induced bandgap reduction with H‐ion irradiation, the GaAsN potential landscape is engineered, enabling isolated, narrow emission lines that function as single‐photon sources with g(2)(0) ∼ 0.
Akant Sagar Sharma, Paolo De Vincenzi, Nadine Denis, Francesca Santangeli, Riccardo Pallucchi, Harikrishnan Gopalakrishnan, Elena Blundo, Antonio Polimeni, Marco Felici, Fumitaro Ishikawa, Marta De Luca   +10 more
wiley   +1 more source

Stabilization of Strongly Reduced Fe(I) Single Atom Species Coordinated in a 2D Self‐Assembled Metal–Organic Network

Advanced Functional Materials, EarlyView.
A graphene‐supported 2D metal–organic network stabilizes highly reactive Fe(I)‐N4 single sites through Co‐induced charge redistribution. Combined experiments and theory reveal Fe(I) formation, oxygen‐driven oxidation, and O2 activation mechanisms, offering a strategy to access low‐valent iron centers relevant to catalytic and biological processes ...
Alessandro Namar, Basant Roondhe, Michela De Col, Stefania Baronio, Matteo Jugovac, Mattia Scardamaglia, Eleanor Frampton, Nikolay Vinogradov, Paolo Giannozzi, Erik Vesselli   +9 more
wiley   +1 more source

Parametric resonances and resonant delocalisation in quasi-phase matched photon-pair generation and quantum frequency conversion

New Journal of Physics, 2019
The existing widely-accepted theory of photon-pair generation via spontaneous down-conversion (SPDC) in nonlinear optical crystals and waveguides is incomplete, as it fails to account for the important physical phenomenon of parametric resonances.
Philip B Main, Peter J Mosley, Andrey V Gorbach   +2 more
doaj   +1 more source

Atom-mediated Spontaneous Parametric Down-conversion Using Evanescent Modes in Nonlinear Periodic Waveguides

, 2018
Relying on the bandgap modes of a nonlinear periodic waveguide, we propose the concept of atom-mediated spontaneous parametric down-conversion, where photon-pairs are only generated with a single 2-level emitter present, creating a heralded excitation ...
Pertsch, Thomas, Poddubny, Alexander, Thomas Pertsch, Andrey A. Sukhorukov, Sina Saravi, Saravi, Sina, Frank Setzpfandt, Sukhorukov, Andrey, Setzpfandt, Frank, Alexander N. Poddubny   +9 more
core   +1 more source

Decoupling Li+ Transport in Self‐Healing Polymer Dual‐Salt Electrolytes for Room Temperature Lithium Metal Batteries

Advanced Functional Materials, EarlyView.
A self‐healable polymer matrix, crosslinked via dynamic imine bonds, is synergistically coupled with a LiPF6–LiDFOB dual‐salt system to decouple Li+ from the polymer matrix, enabling fast Li+ transport. This strategy offers an effective pathway toward high‐performance, next‐generation gel‐polymer‐based Li‐metal batteries.
Soumallya Banerjee, Yu‐Te Chen, Chi‐Hsuan Lee, Atul Dhage, Zeeshan Alam Ansari, Chun‐Wei Pao, Shun‐Hsiang Chan, Shun‐Ming Huang, Chu‐Chen Chueh, Hong‐Cheu Lin, Chih Wei Chu   +10 more
wiley   +1 more source

Nonlinear power dependence of the spectral properties of an optical parametric oscillator below threshold in the quantum regime

New Journal of Physics, 2020
Photon pairs and heralded single photons, obtained from cavity-assisted parametric down conversion (PDC), play an important role in quantum communications and technology.
Golnoush Shafiee, Dmitry V Strekalov, Alexander Otterpohl, Florian Sedlmeir, Gerhard Schunk, Ulrich Vogl, Harald G L Schwefel, Gerd Leuchs, Christoph Marquardt   +8 more
doaj   +1 more source

Observation of spontaneous parametric down conversion in LiNbO3 waveguide arrays

, 2016
We study experimentally the process of bi-photon generation through spontaneous parametric down-conversion in waveguide arrays. We show the formation of a unique spatial-spectral photon pattern and its dependence on the phase-matching ...
Pertsch, Thomas, Neshev, Dragomir, Sukhorukov, Andrey, Kivshar, Yuri, Solntsev, Alexander, Setzpfandt, Frank, Wu, Che   +6 more
core