Distinguishing Optical and Acoustic Phonon Temperatures and Their Energy Coupling Factor under Photon Excitation in nm 2D Materials
Sign Up to like & getrecommendations! Published in 2020 at "Advanced Science"
DOI: 10.1002/advs.202000097
Abstract: Abstract Under photon excitation, 2D materials experience cascading energy transfer from electrons to optical phonons (OPs) and acoustic phonons (APs). Despite few modeling works, it remains a long‐history open problem to distinguish the OP and… read more here.
Keywords: excitation materials; photon excitation; energy; coupling factor ... See more keywords
Alzheimer mouse brain tissue measured by time resolved fluorescence spectroscopy using single- and multi-photon excitation of label free native molecules.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of biophotonics"
DOI: 10.1002/jbio.201600318
Abstract: Time resolved spectroscopic measurements with single-photon and multi-photon excitation of native molecules were performed ex vivo on brain tissues from an Alzheimer's disease (AD) and a wild type (WT) mouse model using a streak camera.… read more here.
Keywords: photon excitation; multi photon; time; time resolved ... See more keywords
Two-Photon Excitation Photoredox Catalysis Enabled Atom Transfer Radical Polymerization.
Sign Up to like & getrecommendations! Published in 2023 at "Journal of the American Chemical Society"
DOI: 10.1021/jacs.3c02832
Abstract: In recent years, metal-free photoredox-catalyzed atom transfer radical polymerization (O-ATRP) has gained wide attention because of its advantages (e.g., no metal contamination and mild reaction conditions). However, this traditional one-photon excitation catalysis has thermodynamic limits.… read more here.
Keywords: two photon; photoredox; photon excitation; photon ... See more keywords
Two-photon excitation spectroscopy of photosynthetic light-harvesting complexes and pigments.
Sign Up to like & getrecommendations! Published in 2019 at "Faraday discussions"
DOI: 10.1039/c8fd00198g
Abstract: In addition to (bacterio)chlorophylls, (B)Chls, light-harvesting complexes (LHCs) bind carotenoids, and/or their oxygen derivatives, xanthophylls. Xanthophylls/carotenoids have pivotal functions in LHCs: in stabilization of the structure, as accessory light-harvesting pigments and, probably most importantly, in… read more here.
Keywords: light harvesting; two photon; spectroscopy; photon ... See more keywords
Biexciton initialization by two-photon excitation in site-controlled quantum dots: The complexity of the antibinding state case
Sign Up to like & getrecommendations! Published in 2020 at "Applied Physics Letters"
DOI: 10.1063/5.0011383
Abstract: In this work, we present a biexciton state population in (111)B oriented site-controlled InGaAs quantum dots (QDs) by resonant two photon excitation. We show that the excited state recombines emitting highly pure single photon pairs… read more here.
Keywords: state; two photon; biexciton; photon excitation ... See more keywords
Measurement of the two-photon excitation cross-section of the 6p′[3/2]2 and 6p′[1/2]0 levels of Xe I at the wavelengths 224.3 and 222.6 nm
Sign Up to like & getrecommendations! Published in 2021 at "Plasma Sources Science and Technology"
DOI: 10.1088/1361-6595/abfbeb
Abstract: The two-photon excitation cross-section is a key parameter for the two-photon absorption laser induced fluorescence (TALIF) method, which is commonly used to measure atomic densities in gaseous media, especially for plasma diagnostics. The method consists… read more here.
Keywords: two photon; photon; cross section; photon excitation ... See more keywords
Two-photon excitation of rubidium atoms inside porous glass
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review A"
DOI: 10.1103/physreva.96.043819
Abstract: We study the two-photon laser excitation to the 5D$_{5/2}$ energy level of $^{85}$Rb atoms contained in the interstices of a porous material made from sintered ground glass with typical pore dimensions in the 10 -… read more here.
Keywords: photon excitation; two photon; glass; excitation rubidium ... See more keywords
Microwave-optical two-photon excitation of Rydberg states
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.97.033410
Abstract: We report efficient microwave-optical two photon excitation of Rb Rydberg atoms in a magneto-optical trap. This approach allows the excitation of normally inaccessible states and provides a path toward excitation of high-angular-momentum states. The efficiency… read more here.
Keywords: two photon; excitation rydberg; photon excitation; excitation ... See more keywords
Multiple-photon excitation of nitrogen vacancy centers in diamond
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review B"
DOI: 10.1103/physrevb.97.134112
Abstract: We report the first observation of multi-photon photoluminescence excitation (PLE) below the resonant energies of nitrogen vacancy (NV) centers in diamond. The quadratic and cubic dependence of the integrated fluorescence intensity as a function of… read more here.
Keywords: nitrogen vacancy; photon; vacancy centers; photon excitation ... See more keywords
Two-Photon Excitation Sets Limit to Entangled Photon Pair Generation from Quantum Emitters.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review letters"
DOI: 10.1103/physrevlett.129.193604
Abstract: Entangled photon pairs are key to many novel applications in quantum technologies. Semiconductor quantum dots can be used as sources of on-demand, highly entangled photons. The fidelity to a fixed maximally entangled state is limited… read more here.
Keywords: two photon; excitation; quantum; entangled photon ... See more keywords
Three-Photon Excitation of InGaN Quantum Dots.
Sign Up to like & getrecommendations! Published in 2023 at "Physical review letters"
DOI: 10.1103/physrevlett.130.083602
Abstract: We demonstrate that semiconductor quantum dots can be excited efficiently in a resonant three-photon process, while resonant two-photon excitation is highly suppressed. Time-dependent Floquet theory is used to quantify the strength of the multiphoton processes… read more here.
Keywords: three photon; excitation; quantum dots; photon excitation ... See more keywords