Results 21 to 30 of about 2,373,679 (282)

Gravitational red-shift and deflection of slow light [PDF]

, 2008
We explore the nature of the classical propagation of light through media with strong frequency-dependent dispersion in the presence of a gravitational field.
A. N. Jordan, J. B. Hartle, J. C. Howell, J. Dressel, L. D. Landau, L. M. Barkov, M. Born, M. Göckeler, P. W. Milonni, S. G. Rajeev   +9 more
core   +3 more sources

More complete discussion of the time-dependence of the non-static line element for the universe [PDF]

, 1930
In a previous article,(1) I have shown that a continuous transformation of matter into radiation, occurring throughout the universe, as postulated by the astrophysicists, would necessitate a nonstatic line element for the universe, and have shown that ...
Tolman, Richard C.
core   +1 more source

Spectral Shifts of Nonadiabatic High-Order Harmonic Generation

Applied Sciences, 2013
High-order harmonic generation (HHG) is a nonlinear nonperturbative process in ultrashort intense laser-matter interaction. It is the main source of coherent attosecond (1 as = 10−18 s) laser pulses to investigate ultrafast electron dynamics.
André D. Bandrauk, Xue-Bin Bian
doaj   +1 more source

Color Changes in Ag Nanoparticle Aggregates Placed in Various Environments: Their Application to Air Monitoring

Nanomaterials, 2021
Fresh Ag nanoparticles (NPs) dispersed on a transparent SiO2 exhibit an intense optical extinction band originating in localized surface plasmon resonance (LSPR) in the visible range.
Koichi Ozaki, Fumitaka Nishiyama, Katsumi Takahiro   +2 more
doaj   +1 more source

Spectral Red-Shift Versus Broadening from Photon and Dilepton Spectra [PDF]

, 2001
We estimate the photon and dilepton emission rates from hot hadronic matter with in-medium spectral shift and broadening of vector mesons. It is observed that both the WA98 photon data and CERES/NA45 dilepton data can be well reproduced with similar ...
Alam, Jan-e, Roy, Pradip, Sarkar, Sourav, Sinha, Bikash   +3 more
core   +2 more sources

Cosmological Red-shift [PDF]

Nature, 1964
Hoyle1 has shown that for a steady-state universe consisting of uniformly distributed matter of density ρ a metric of the form: applies if it is assumed that a uniform creation of matter occurs.
openaire   +2 more sources

Color Point Tuning for (Sr,Ca,Ba) Si2O2N2:Eu2+ for White Light LEDs [PDF]

, 2009
Color point tuning is an important challenge for improving white light LEDs. In this paper, the possibilities of color tuning with the efficient LED phosphor Sr1−x−y−zCaxBaySi2O2N2:Euz2+ (0 ≤ x, y ≤ 1; 0.005 ≤ z ≤ 0.16) are investigated.
Bachmann, Volker, Meijerink, Andries, Oeckler, Oliver, Ronda, Cees, Schnick, Wolfgang   +4 more
core   +1 more source

Neutrinos produced by ultrahigh-energy photons at high red shift [PDF]

, 2000
Some of the proposed explanations for the origin of ultrahigh-energy cosmic rays invoke new sources of energetic photons (e.g., topological defects, relic particles, etc.).
A. Borsellino, A. I. Nikishov, A. I. Nikishov, A. Mastichiadis, A. Vilenkin, A. Vilenkin, Alexander Kusenko, C. C. Steidel, C. T. Hill, C. T. Hill, C. T. Hill, D. Fargion, D. J. Bird, D. J. Bird, D. J. Chung, D. J. Chung, E. Waxman, E. Waxman, F. W. Stecker, F. W. Stecker, G. Gelmini, G. Gelmini, G. Pugliese, G. R. Farrar, G. R. Farrar, G. Sigl, G. T. Zatsepin, G. T. Zatsepin, J. J. Condon, J. P. Rachen, J. V. Jelley, K. Benakli, K. Benakli, K. Greisen, K. J. Mork, K. Mannheim, M. A. Lawrence, M. B. Hindmarsh, M. Birkel, M. Takeda, Marieke Postma, P. Bhattacharjee, P. Bhattacharjee, P. Gondolo, P. L. Biermann, P. Madau, R. J. Gould, R. J. Protheroe, R. J. Protheroe, R. J. Protheroe, R. W. Brown, S. Yoshida, T. Stanev, T. Weiler, V. A. Kuzmin, V. A. Kuzmin, V. A. Kuzmin, V. Anguelov, V. Berezinski, V. Berezinsky, V. Berezinsky, V. Berezinsky, V. Kuzmin, V. S. Berezinsky   +63 more
core   +2 more sources

Screening High-z GRBs with BAT Prompt Emission Properties [PDF]

, 2008
Detecting high-z GRBs is important for constraining the GRB formation rate, and tracing the history of re-ionization and metallicity of the universe.
David Palmer, Ed Fenimore, K. S. Dhuga, M. Galassi, M. Stamatikos, N. Gehrels, T. N. Ukwatta, T. Sakamoto   +7 more
core   +2 more sources

Extreme red shifted SERS nanotags [PDF]

Chemical Science, 2015
Extreme red-shifted nanotags have been developed and they provide effective SERS with picomolar detection limits when excited at 1280 nm.
Bedics, Matthew A., Kearns, Hayleigh, Cox, Jordan M., Mabbott, Sam, Ali, Fatima, Shand, Neil C., Faulds, Karen, Benedict, Jason B., Graham, Duncan, Detty, Michael R.   +9 more
openaire   +4 more sources