Results 11 to 20 of about 519,355 (198)
Applied Sciences, 2020 A method of reference-free speckle spectroscopy based on the statistical analysis of intensity spatial fluctuations of the spectrally-selected multiple-scattered fluorescence radiation is examined in the case of the finite-band spectral selection of ...
Dmitry Zimnyakov +3 more
doaj +1 more source
Exploring beam size measurement based on the Talbot effect at BEPCII
Journal of Synchrotron Radiation, 2023 Vertical beam size measurements were carried out at Beijing Electron–Positron Collider II (BEPCII) using a phase grating and an absorption grating based on the Talbot effect.
Wan Zhang +5 more
doaj +1 more source
Manifestation of effects of the angular spectrum of the illuminating field in polychromatic interference microscopy of stratified objects [PDF]
Компьютерная оптика, 2018 An effect of the angular spectrum width of a polychromatic illuminating field on the interference pattern color in optical microscopy of stratified objects is considered.
Anton Dyachenko +2 more
doaj +1 more source
International Journal of Electrochemical Science, 2018 The effect of Cd on (Tl0.6Bi0.4)Sr2(Ca1-xCdx)Cu2O7-δ (Tl-1212) superconductor is reported. Cd was chosen to partially replace Ca due to the single valence (+2) of both elements and this work is focused on the ionic radius effect on this phase.
S.S.O. Farhat, R. Abd-Shukor
doaj +1 more source
Coherence Length of Excitons in a Semiconductor Quantum Well [PDF]
, 2002 We report on the first experimental determination of the coherence length of excitons in semiconductors using the combination of spatially resolved photoluminescence with phonon sideband spectroscopy.
D. Gammon +11 more
core +2 more sources
Projectile Coherence Effects in Twisted Electron Ionization of Helium
Atoms, 2023 Over the last decade, it has become clear that for heavy ion projectiles, the projectile’s transverse coherence length must be considered in theoretical models.
A. L. Harris
doaj +1 more source
Variable numerical-aperture temporal-coherence measurement of resonant-cavity LEDs [PDF]
, 2003 The first interferometric measurements of temporal-coherence length variation with numerical aperture (NA) are described for 650 nm, resonant-cavity light-emitting diodes (LEDs) agreeing with spectrally derived results.
Coutinho, RC +6 more
core +1 more source
Partial coherence and coherence length in StimPDC
, 2023 In parametric down conversion, a nonlinear crystal is pumped by a laser and spontaneous emission takes place in signal and idler modes according to the phase matching conditions. A seed laser can stimulate the emission in the signal beam if there is mode overlap between them.
Santos, Gustavo Henrique dos +4 more
openaire +2 more sources
Coherence length of neutron superfluids [PDF]
Physical Review C, 1997 The coherence length of superfluid neutron matter is calculated from the microscopic BCS wavefunction of a Cooper pair in momentum space making use of the Bonn meson-exchange potential. We find that the coherence length is proportional to the Fermi momentum-to pairing gap ratio, in good agreement with simple estimates used in the literature, and we ...
Lazzari, G. +4 more
openaire +3 more sources
Magnetoresistance of proximity coupled Au wires [PDF]
, 2001 We report measurements of the magnetoresistance (MR) of narrow Au wires coupled to a superconducting Al contact on one end, and a normal Au contact on the other. The MR at low magnetic field $B$ is quadratic in $B$, with a characteristic field scale $B_c$
A. F. Andreev +17 more
core +1 more source