A Solution-Processed Ultrafast Optical Switch Based on a Nanostructured Epsilon-Near-Zero Medium.
Sign Up to like & getrecommendations! Published in 2017 at "Advanced materials"
DOI: 10.1002/adma.201700754
Abstract: All the optical properties of materials are derived from dielectric function. In spectral region where the dielectric permittivity approaches zero, known as epsilon-near-zero (ENZ) region, the propagating light within the material attains a very high… read more here.
Keywords: solution processed; solution; ultrafast optical; epsilon near ... See more keywords
Ultrafast optical integration and pattern classification for neuromorphic photonics based on spiking VCSEL neurons
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-62945-5
Abstract: In today’s data-driven world, the ability to process large data volumes is crucial. Key tasks, such as pattern recognition and image classification, are well suited for artificial neural networks (ANNs) inspired by the brain. Neuromorphic… read more here.
Keywords: classification; pattern; based spiking; optical integration ... See more keywords
Ultrafast all-optical modulation in Fe-doped GaN at 1.31 and 1.55 μm with high contrast and ultralow power
Sign Up to like & getrecommendations! Published in 2017 at "Applied Physics Letters"
DOI: 10.1063/1.4980090
Abstract: We demonstrate the possibility of all-optical modulation at 1.31 and 1.55 μm optical communication wavelengths by interband pumping of Fe-doped GaN crystals using femtosecond pump-probe techniques. Considering the lower photon energy of near-infrared probe pulses, switching… read more here.
Keywords: optical modulation; modulation; contrast; doped gan ... See more keywords
Anisotropic ultrafast optical response of terahertz pumped graphene
Sign Up to like & getrecommendations! Published in 2019 at "Applied Physics Letters"
DOI: 10.1063/1.5093089
Abstract: We have measured the ultrafast anisotropic optical response of highly doped graphene to an intense single cycle terahertz pulse. The temporal shape of the signal is similar to that of the pump terahertz electric field… read more here.
Keywords: response; anisotropic ultrafast; ultrafast optical; terahertz ... See more keywords
Ultrafast optical excitation of magnetic dynamics in van der Waals magnets: Coherent magnons and BKT dynamics in NiPS3
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review B"
DOI: 10.1103/physrevb.105.155138
Abstract: Optical pump-probe experiments carried out in the time domain reveal both the intrinsic low energy dynamics and its connections to higher energy excitations in correlated electron systems. In this work, we propose two microscopic mechanisms… read more here.
Keywords: ultrafast optical; der waals; van der; waals magnets ... See more keywords
Ultrafast optical excitation of coherent magnons in antiferromagnetic NiO
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.95.174407
Abstract: Antiferromagnets are rapidly gaining importance as crucial ingredients in many applications. They are abundant in nature and they are robust against externally applied fields. Rather usefully, their spin resonances often lie within the THz regime,… read more here.
Keywords: antiferromagnetic nio; effect; excitation; optical excitation ... See more keywords
Demonstration of Two-Atom Entanglement with Ultrafast Optical Pulses.
Sign Up to like & getrecommendations! Published in 2017 at "Physical review letters"
DOI: 10.1103/physrevlett.119.230501
Abstract: We demonstrate quantum entanglement of two trapped atomic ion qubits using a sequence of ultrafast laser pulses. Unlike previous demonstrations of entanglement mediated by the Coulomb interaction, this scheme does not require confinement to the… read more here.
Keywords: atom entanglement; two atom; demonstration two; entanglement ultrafast ... See more keywords
Theoretical Demonstration of 250 Gb/s Ultrafast All-Optical Memory Using Mach-Zehnder Interferometers With Quantum-Dot Semiconductor Optical Amplifiers
Sign Up to like & getrecommendations! Published in 2021 at "IEEE Journal of Selected Topics in Quantum Electronics"
DOI: 10.1109/jstqe.2019.2948051
Abstract: Ultrafast all-optical memory at 250 Gb/s using Mach-Zehnder interferometers (MZIs) with symmetrical quantum-dot semiconductor optical amplifiers (QDSOAs), acting as all-optical AND gate and regenerator in a loop configuration, is theoretically demonstrated for 500 loop circulations… read more here.
Keywords: ultrafast optical; using mach; mach zehnder; zehnder interferometers ... See more keywords
Synthesizing ultrafast optical pulses with arbitrary spatiotemporal control
Sign Up to like & getrecommendations! Published in 2022 at "Science Advances"
DOI: 10.1126/sciadv.abq8314
Abstract: The ability to control the instantaneous state of light, from high-energy pulses down to the single-photon level, is an indispensable requirement in photonics. This has, for example, facilitated spatiotemporal probing and coherent control of ultrafast… read more here.
Keywords: control; optical pulses; pulses arbitrary; synthesizing ultrafast ... See more keywords
Ultrafast all-optical plasmonic graphene modulator.
Sign Up to like & getrecommendations! Published in 2018 at "Applied optics"
DOI: 10.1364/ao.57.006645
Abstract: By utilizing the ultrafast dynamics of the photo-excited electrons in graphene, we theoretically present an ultrafast all-optical plasmonic modulator. With the help of an external pump, the femtosecond thermodynamics of the hot carriers can tune… read more here.
Keywords: optical plasmonic; modulator; plasmonic graphene; graphene modulator ... See more keywords
Ultrafast all-optical phase switching enabled by epsilon-near-zero materials in silicon.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.454181
Abstract: Transparent conducting oxides (TCOs) have emerged as both particularly appealing epsilon-near-zero (ENZ) materials and remarkable candidates for the design and fabrication of active silicon nanophotonic devices. However, the leverage of TCO's ultrafast nonlinearities requires precise… read more here.
Keywords: ultrafast optical; phase switching; epsilon near; near zero ... See more keywords