Results 31 to 40 of about 2,353,407 (330)

A chemical sensor based on a photonic-crystal L3 nanocavity defined in a silicon-nitride membrane [PDF]

, 2014
The application of a silicon-nitride based L3 optical nanocavity as a chemical sensor is explored. It is shown that by adjusting the thickness of an ultra-thin Lumogen Red film deposited onto the nanocavity surface, the fundamental optical mode undergoes
Brittle, Stuart, Davis, Frank, Deasy, Kieran, Lidzey, David G., Richardson, Tim H., Sediq, Khalid N., Wang, Tao   +6 more
core   +1 more source

Electronic excited state of protonated aromatic molecules: protonated Fluorene [PDF]

, 2011
The photo-fragmentation spectrum of protonated fluorene has been recorded in the visible spectral region, largely red shifted as compared to the first excited state absorption of neutral fluorene. The spectrum shows two different vibrational progressions,
Ahlrichs, Alata, Antol, Chakraborty, Christophe Jouvet, Claude Dedonder, Dallinga, Dopfer, Dopfer, Du, Dunning, Ernesto Marceca, Freiser, Freiser, Freiser, Garkusha, Gold, Hammonds, Hobbs, Hunter, Im, Ivan Alata, Kappaun, Knorke, Le Page, Leutwyler, Lorenz, Maksic, Michel Broquier, Olah, Olah, Pathak, Perkampus, Reid, Ricks, Rode, Schreiber, Snow, Solcà, Solcà, Weigend, Zhang, Zhao   +42 more
core   +5 more sources

Exploration of natural red-shifted rhodopsins using a machine learning-based Bayesian experimental design

Communications Biology, 2021
Inoue, Takeuchi and colleagues propose a machine learning-based protocol to screen rhodopsins for their likelihood to be red-shifted. After experimental verification, their tool shows remarkable success at identifying rhodopsins that showed red-shift ...
Keiichi Inoue, Masayuki Karasuyama, Ryoko Nakamura, Masae Konno, Daichi Yamada, Kentaro Mannen, Takashi Nagata, Yu Inatsu, Hiromu Yawo, Kei Yura, Oded Béjà, Hideki Kandori, Ichiro Takeuchi   +12 more
doaj   +1 more source

Anomalous blue-shift of terahertz whispering-gallery modes via dielectric and metallic tuning

, 2019
The vast majority of resonant systems show a red-shift for the resonance frequency when a perturbation, e.g. losses, are introduced to the system. In contrast, here we report for the first time the experimental demonstration of both red- and anomalous ...
Jones, Angus Harvey, Leonhardt, Rainer, Schwefel, Harald G. L., Vogt, Dominik Walter   +3 more
core   +1 more source

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

Effects of urea on activity and conformation of acid phosphatase from wheat germ

浙江大学学报. 农业与生命科学版, 2004
Changes in conformation and activity of acid phosphatase from wheat germ following denaturation of the enzyme by urea solutions of different concentrations were measured by the shift in fluorescence and differential UV-absorption spectrum.
WANG Li-ming, XU Dong-mei, LIU Guang-shen, WANG Shen-fa   +3 more
doaj   +1 more source

Reconstructing the metric of the local Universe from number counts observations

, 2017
Number counts observations available with new surveys such as the Euclid mission will be an important source of information about the metric of the Universe.
Romano, Antonio Enea, Vallejo, Sergio Andres   +1 more
core   +1 more source

Modeling of the second harmonic generation in a lens-shaped InAs/GaAs quantum core/shell dot under temperature, pressure and applied electric field effects

Results in Physics, 2020
In this paper, we explore the second harmonic generation (SHG) in a lens-shaped InAs/GaAs quantum core/shell (LSQCS). The three-dimensional Schrödinger equation is given under the framework of the effective mass approximation and it is solved by using ...
D. Makhlouf, M. Choubani, F. Saidi, H. Maaref   +3 more
doaj   +1 more source

Photon Redshift in a Magnetic field

, 2010
Previous results from the authors concerning the arising a tiny photon anomalous paramagnetic moment are also interpreted as a red-shift in analogy to the gravitational known effect.
ELIZABETH RODRÍGUEZ QUERTS, HUGO PÉREZ ROJAS, JOSÉ A. HELAYËL-NETO   +2 more
core   +1 more source

Ferromagnetic resonance of a two-dimensional array of nanomagnets: Effects of surface anisotropy and dipolar interactions

, 2018
We develop an analytical approach for studying the FMR frequency shift due to dipolar interactions and surface effects in two-dimensional arrays of nanomagnets with (effective) uniaxial anisotropy along the magnetic field.
Déjardin, J. -L., Franco, A. F., Kachkachi, H., Vernay, F.   +3 more
core   +2 more sources