Space-Time-Modulated Reconfigurable Metamaterial Based on a Field-Focused Cavity for Nonreciprocal Transmission Control and Frequency Conversion.
Sign Up to like & getrecommendations! Published in 2022 at "ACS applied materials & interfaces"
DOI: 10.1021/acsami.2c04823
Abstract: Lorentz reciprocity is a fundamental physical property limiting advanced wave propagation control. Previously, special materials and magnetic bias were used to break the reciprocity; however, the approaches are limited by the bulky and costly implementation.… read more here.
Keywords: wave propagation; time modulated; control; field ... See more keywords
Sidelobes and sideband minimization in time-modulated array antenna based on chaotic exchange nonlinear dandelion optimization algorithm
Sign Up to like & getrecommendations! Published in 2024 at "Scientific Reports"
DOI: 10.1038/s41598-024-70222-y
Abstract: Time-modulated array antenna (TMAA) is a new type of array antenna based on time modulation technology. By introducing "time" as the fourth dimensional design freedom into the design of conventional array antennas in three-dimensional space,… read more here.
Keywords: modulated array; time modulated; time; array ... See more keywords
Beam steering for OAM beams using time-modulated circular arrays
Sign Up to like & getrecommendations! Published in 2018 at "Electronics Letters"
DOI: 10.1049/el.2018.5386
Abstract: The theory of time-modulated circular arrays in respect of generating orbital angular momentum (OAM) beams at harmonic frequencies is analysed. Without using expensive phase shifters in phased arrays, beam steering for OAM beams is achieved… read more here.
Keywords: beam steering; oam beams; time modulated; modulated circular ... See more keywords
Transport control of dust particles by pulse-time modulated RF in dusty plasmas
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Applied Physics"
DOI: 10.1063/1.5093349
Abstract: Transport of dust particles was studied in radio frequency (RF) plasmas. Dust particles of two sizes were injected in the plasmas. The plasmas were generated by applying a pulse-time modulated RF voltage. The pulse-time modulation… read more here.
Keywords: plasmas; pulse time; time modulated; dust particles ... See more keywords
Non-reciprocal acoustic transmission via space-time modulated membranes
Sign Up to like & getrecommendations! Published in 2020 at "Applied Physics Letters"
DOI: 10.1063/1.5132699
Abstract: Non-reciprocity has recently attracted considerable attention as it enables new possibilities in wave manipulation and control. Here, we propose and analyze theoretically and numerically a waveguide system consisting of two membranes whose surface tensions are… read more here.
Keywords: transmission via; non reciprocal; time modulated; time ... See more keywords
Nonreciprocal Wavefront Engineering with Time-Modulated Gradient Metasurfaces
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.11.054054
Abstract: Author(s): Zang, JW; Correas-Serrano, D; Do, JTS; Liu, X; Alvarez-Melcon, A; Gomez-Diaz, JS | Abstract: © 2019 American Physical Society. We propose a paradigm to realize nonreciprocal wavefront engineering using time-modulated gradient metasurfaces. The essential… read more here.
Keywords: gradient metasurfaces; modulated gradient; wavefront engineering; nonreciprocal wavefront ... See more keywords
Diffraction Phenomena in Time-Varying Metal-Based Metasurfaces
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review Applied"
DOI: 10.1103/physrevapplied.19.044014
Abstract: This paper presents an analytical framework for the analysis of time-varying metal-based metamaterials. Concretely, we particularize the study to time-modulated metal-air interfaces embedded between two different semi-infinite media that are illuminated by monochromatic plane waves… read more here.
Keywords: time; time modulated; metal based; time varying ... See more keywords
Coupled harmonics due to time-modulated point scatterers
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review B"
DOI: 10.1103/physrevb.110.184102
Abstract: We consider the resonance and scattering properties of a composite medium containing scatterers whose properties are modulated in time. When excited with an incident wave of a single frequency, the scattered field consists of a… read more here.
Keywords: due time; time modulated; time; harmonics due ... See more keywords
Space-time-modulated stochastic processes.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.042132
Abstract: Starting from the physical problem associated with the Lorentzian transformation of a Poisson-Kac process in inertial frames, the concept of space-time-modulated stochastic processes is introduced for processes possessing finite propagation velocity. This class of stochastic… read more here.
Keywords: modulated stochastic; stochastic processes; space; time modulated ... See more keywords
Nonreciprocity in Bianisotropic Systems with Uniform Time Modulation.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.266102
Abstract: Physical systems with material properties modulated in time provide versatile routes for designing magnetless nonreciprocal devices. Traditionally, nonreciprocity in such systems is achieved exploiting both temporal and spatial modulations, which inevitably requires a series of… read more here.
Keywords: modulation; time modulated; time; nonreciprocity bianisotropic ... See more keywords
Manipulating Coherence of Near-Field Thermal Radiation in Time-Modulated Systems.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review letters"
DOI: 10.1103/physrevlett.130.096902
Abstract: We show that the spatial coherence of thermal radiation can be manipulated in time-modulated photonic systems supporting surface polaritons. We develop a fluctuational electrodynamics formalism for such systems to calculate the cross-spectral density tensor of… read more here.
Keywords: thermal radiation; time; near field; coherence ... See more keywords