Results 11 to 20 of about 16,116 (221)

Non-linear bistability in pulsed optical traps. [PDF]

open access: yesNanophotonics
Optical trapping, also known as optical tweezing or optical levitation, is a technique that uses highly focused laser beams to manipulate micro- and nanoscopic particles. In optical traps driven by high-energy pulses, material non-linearity can result in
Vernon AJ   +2 more
europepmc   +2 more sources

Low-temperature optical bistability and multistability in superconducting photonic multilayers with graphene

open access: yesResults in Physics, 2023
Optical bistability and multistability are numerically investigated based on periodic superconducting photonic multilayers with graphene in cryogenic environments.
Hao Ni   +6 more
doaj   +1 more source

OPTICAL BISTABILITY IN A DEGENERATE TWO-LEVEL EIT MEDIUM UNDER THE INFLUENCE OF AN EXTERNAL MAGNETIC FIELD: AN ANALYTICAL APPROACH

open access: yesTạp chí Khoa học Đại học Đà Lạt, 2021
We investigate the behavior of optical bistability in a degenerate two-level atomic medium using an external magnetic field to separate the lower level into two distinct levels that both connect to an upper level by the probe and coupling laser fields ...
Le Thi Minh Phuong   +6 more
doaj   +1 more source

Low-Threshold and Tunable Optical Bistability Based on Topological Edge State in One-Dimensional Photonic Crystal Heterostructure With Graphene

open access: yesIEEE Access, 2020
In this article, we present a theoretical analysis of the optical bistability phenomenon of the transmitted light beam in a graphene-based one-dimensional photonic crystal heterostructure in terahertz frequency range.
Yuxiang Peng   +8 more
doaj   +1 more source

Tunable Optical Bistability, Tristability and Multistability in Arrays of Graphene

open access: yesApplied Sciences, 2020
The optical bistability, tristability and multistability are explored in arrays of graphene. The arrays are periodically arranged spatially by single sheets of graphene.
Xiuju Zhao   +5 more
doaj   +1 more source

Quantum resonant optical bistability with a narrow atomic transition: bistability phase diagram in the bad cavity regime

open access: yesNew Journal of Physics, 2023
We report on the observation of a novel manifestation of saturation-induced optical bistability in a resonantly pumped optical ring cavity interacting strongly with a cloud of atoms via a narrow atomic transition.
D Rivero   +5 more
doaj   +1 more source

Optical bistability in two-dimensional nonlinear composites of coated cylinders with nonlinear core and graded shell

open access: yesEPJ Applied Metamaterials, 2020
The intrinsic optical bistability of the nonlinear composite consisting of coated cylinders with nonlinear core and graded Drude shell is investigated with self-consistent mean-field approximation.
Wu Ya M.   +4 more
doaj   +1 more source

Temperature Dependence of Optical Bistability in Superconductor–Semiconductor Photonic Crystals Embedded with Graphene

open access: yesCrystals, 2023
We theoretically investigate the optical bistability in superconductor–semiconductor photonic crystals composed of graphene. The photonic crystals are symmetric to the center and arranged alternately by the superconductor (HgBa2Ca2Cu3O8+δ) and ...
Libing Qian   +5 more
doaj   +1 more source

Bistability patterns and nonlinear switching with very high contrast ratio in a 1550 nm quantum dash semiconductor laser [PDF]

open access: yes, 2012
We report on the experimental observation of optical bistability (OB) and nonlinear switching (NS) in a nanostructure laser; specifically a 1550 nm quantum dash Fabry-Perot laser subject to external optical injection and operated in reflection. Different
A. Hurtado   +6 more
core   +1 more source

Terahertz optical bistability of graphene-coated cylindrical core–shell nanoparticles

open access: yesJournal of Theoretical and Applied Physics, 2018
In this study, we investigate the optical bistability of graphene-coated nanoparticles with cylindrical core–shell structure at terahertz frequency, because graphene displays optical bistability and multistability in a broad range of incident optical ...
Tayebeh Naseri   +3 more
doaj   +1 more source

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