Results 11 to 20 of about 321,428 (283)

Experimental Comparison of the Single-Event Effects of Single-Photon and Two-Photon Absorption under a Pulsed Laser

open access: yesApplied Sciences, 2022
The pulsed laser has gradually become the standard method of studying the single-event effects of micro-nano devices, and it is a powerful supplement to heavy ion experiments on single-event effects.
Heng An   +6 more
doaj   +1 more source

Is orange carotenoid protein photoactivation a single-photon process?

open access: yesBiophysical Reports, 2022
In all published photoactivation mechanisms of orange carotenoid protein (OCP), absorption of a single photon by the orange dark state starts a cascade of red-shifted OCP ground-state intermediates that subsequently decay within hundreds of milliseconds,
Stanisław Niziński   +5 more
doaj   +1 more source

On the application of Two-Photon Absorption for Laser Fault Injection attacks

open access: yesTransactions on Cryptographic Hardware and Embedded Systems, 2022
Laser Fault Injection (LFI) is considered to be the most powerful semiinvasive fault injection method for implementation attacks on security devices. In this work we discuss for the first time the application of the nonlinear Two-Photon Absorption (TPA)
Bodo Selmke   +7 more
doaj   +3 more sources

Photon number resolution without optical mode multiplication

open access: yesNanophotonics, 2023
Common methods to achieve photon number resolution rely on fast on-off single-photon detectors in conjunction with temporal or spatial mode multiplexing.
Vetlugin Anton N.   +3 more
doaj   +1 more source

First-principles calculations of the optical response of single-layer and bilayer armchair graphene nanoribbons

open access: yesFrontiers in Nanotechnology, 2022
Electronic and optical properties of single-layer and bilayer armchair graphene nanoribbons are investigated using a first-principles method. Increased nanoribbon width reduces the band gap and causes a red shift in photon absorption energy.
Yijun Ge, Timothy S. Fisher
doaj   +1 more source

Witnessing entangled two-photon absorption via quantum interferometry

open access: yesAPL Photonics, 2023
Recent investigations have suggested that the use of non-classical states of light, such as entangled photon pairs, may open new and exciting avenues in experimental two-photon absorption spectroscopy.
Áulide Martínez-Tapia   +8 more
doaj   +1 more source

Comparing confocal and two-photon Ca2+ imaging of thin low-scattering preparations

open access: yesBiophysical Reports, 2023
Ca2+ imaging provides insight into biological processes ranging from subcellular dynamics to neural network activity. Two-photon microscopy has assumed a dominant role in Ca2+ imaging.
Jinbo Cheng   +3 more
doaj   +1 more source

Single-photon absorption in coupled atom-cavity systems [PDF]

open access: yesPhysical Review A, 2012
We show how to capture a single photon of arbitrary temporal shape with one atom coupled to an optical cavity. Our model applies to Raman transitions in three-level atoms with one branch of the transition controlled by a (classical) laser pulse, and the other coupled to the cavity.
Dilley, J   +3 more
openaire   +2 more sources

An On-Chip Photon-Counting Reconstructive Spectrometer with Tailored Cascaded Detector Array

open access: yesAdvanced Devices & Instrumentation, 2023
The hybrid integration of superconducting nanowire single-photon detectors (SNSPDs) on various substrates and photonic structures has great potential on developing complicated photonic devices based on single-photon detections, such as photon-counting ...
Jingyuan Zheng   +9 more
doaj   +1 more source

Efficient single photon absorption by optimized superconducting nanowire geometries [PDF]

open access: yes2013 13th International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD), 2013
\copyright 2013 IEEE.
Akhlaghi, Mohsen K.   +4 more
openaire   +2 more sources

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