Photonic time crystals
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-17354-6
Abstract: When space (time) translation symmetry is spontaneously broken, the space crystal (time crystal) forms; when permittivity and permeability periodically vary with space (time), the photonic crystal (photonic time crystal) forms. We proposed the concept of… read more here.
Keywords: time crystal; space time; time; crystal photonic ... See more keywords
Waveform shaping in photonic time-crystals
Sign Up to like & getrecommendations! Published in 2024 at "Scientific Reports"
DOI: 10.1038/s41598-024-53391-8
Abstract: This paper reports on the waveform shaped by a finite duration photonic time-crystal with its permittivity and permeability periodically varying in time. A Gaussian-modulated sinusoidal pulse is incident onto this photonic time-crystal to evaluate the… read more here.
Keywords: shaping photonic; time; photonic time; time crystals ... See more keywords
Entanglement between a Diamond Spin Qubit and a Photonic Time-Bin Qubit at Telecom Wavelength.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.063601
Abstract: We report on the realization and verification of quantum entanglement between a nitrogen-vacancy electron spin qubit and a telecom-band photonic qubit. First we generate entanglement between the spin qubit and a 637 nm photonic time-bin qubit,… read more here.
Keywords: qubit telecom; photonic time; spin qubit; qubit ... See more keywords
Nonuniform Wave Momentum Band Gap in Biaxial Anisotropic Photonic Time Crystals.
Sign Up to like & getrecommendations! Published in 2024 at "Physical review letters"
DOI: 10.1103/physrevlett.134.063801
Abstract: Photonic time crystals (PTCs) host momentum band gaps, enabling intriguing nonresonant light amplification in propagating waves, but opening substantial band gaps demands refractive index changes too extreme for conventional nonlinear optics. Here, we introduce momentum… read more here.
Keywords: momentum band; photonic time; band; band gaps ... See more keywords
Controllable Photonic Time-Bin Qubits from a Quantum Dot
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review X"
DOI: 10.1103/physrevx.8.021078
Abstract: Photonic time bin qubits are well suited to transmission via optical fibres and waveguide circuits. The states take the form $\frac{1}{\sqrt{2}}(\alpha \ket{0} + e^{i\phi}\beta \ket{1})$, with $\ket{0}$ and $\ket{1}$ referring to the early and late… read more here.
Keywords: time; quantum dot; time bin; bin qubits ... See more keywords
Accelerated Information Processing Based on Deep Photonic Time-Delay Reservoir Computing
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Lightwave Technology"
DOI: 10.1109/jlt.2024.3438939
Abstract: Photonic time-delay reservoir computing (TDRC) is an optical neural network structure known for its simple hardware implementation. However, this simplicity reduces information processing speed due to its sequential time multiplexing mechanism, such as the masking… read more here.
Keywords: information processing; photonic time; reservoir;
Metasurface-based realization of photonic time crystals
Sign Up to like & getrecommendations! Published in 2022 at "Science Advances"
DOI: 10.1126/sciadv.adg7541
Abstract: Photonic time crystals are artificial materials whose electromagnetic properties are uniform in space but periodically vary in time. The synthesis of these materials and experimental observation of their physics remain very challenging because of the… read more here.
Keywords: time; physics; space; metasurface based ... See more keywords
Broadband and linearized photonic time-stretch analog-to-digital converter based on a compact dual-polarization modulator.
Sign Up to like & getrecommendations! Published in 2023 at "Applied optics"
DOI: 10.1364/ao.478901
Abstract: A broadband linearization scheme for a photonic time-stretch (PTS) analog-to-digital converter (ADC) is proposed based on a dual-polarization binary phase-shift keying (DP-BPSK) modulator with complementary parallel single-sideband (SSB) modulation. In this system, two stretched radio… read more here.
Keywords: time stretch; digital converter; modulator; polarization ... See more keywords
High-speed ADC based on photonic time-stretched technology with dispersion-tunable CFBG.
Sign Up to like & getrecommendations! Published in 2023 at "Optics express"
DOI: 10.1364/oe.479846
Abstract: We propose a photonic time-stretched analog-to-digital converter (PTS-ADC) based on dispersion-tunable chirped fiber Bragg grating (CFBG), by demonstrating a economical ADC system with seven different stretch factors. The stretch factors are tunable by changing the… read more here.
Keywords: dispersion tunable; time stretched; dispersion; sampling rate ... See more keywords
Temporally-topological defect modes in photonic time crystals.
Sign Up to like & getrecommendations! Published in 2024 at "Optics express"
DOI: 10.1364/oe.517616
Abstract: In this paper, we investigate the properties of temporally-topological defect modes (TTDMs) (or temporally-topological interface states) in the topological photonic time crystal (PTC) systems. The PTC systems are constructed by the cascade of multiple sub-PTCs… read more here.
Keywords: ptc; time; photonic time; defect modes ... See more keywords
Higher-order exceptional points and enhanced polarization sensitivity in anisotropic photonic time-Floquet crystals.
Sign Up to like & getrecommendations! Published in 2024 at "Optics express"
DOI: 10.1364/oe.539505
Abstract: We realized fourth-order exceptional points (EP-4s) in the quasienergy bands of anisotropic photonic time-Floquet crystals (APTCs), where the full in-plane permittivity tensors are periodically modulated in time. We developed the Floquet matrix method for APTCs,… read more here.
Keywords: time; order exceptional; anisotropic photonic; exceptional points ... See more keywords