Results 31 to 40 of about 11,595,150 (357)

Optical Interference Substrates for Nanoparticles and Two-Dimensional Materials

Nanomaterials and Nanotechnology, 2013
Interference substrates are useful in enhancing Raman and luminescence signals and in increasing the optical contrast of nanoparticles and atomically thin layers. Interference substrates played a crucial role in the discovery of the electric field effect
Wolfgang S Bacsa, Ekaterina Pavlenko, Victoria Tishkova   +2 more
doaj   +1 more source

Optical signal processing via two-photon absorption in a semiconductor microcavity for the next generation of high-speed optical communications network [PDF]

, 2006
Due to the introduction of new broadband services, individual line data rates are expected to exceed 100 Gb/s in the near future. To operate at these high speeds, new optical signal processing techniques will have to be developed.
Guo, Wei Hua, O\u27Dowd, John, Krug, T., O'Dowd, John, Bradley, L., Donegan, John Francis, Folliot, Hervé, Maguire, P.J., O'Dowd, J., Guo, W.H., Donegan, J., Folliot, H., Lynch, M., Barry, Liam P., Lynch, Michael, Bradley, Ann Louise, Maguire, Paul J., Barry, Liam, P.   +17 more
core   +1 more source

All-optical sampling utilising two-photon absorption in semiconductor microcavity [PDF]

, 2005
A highly-efficient optical sampling system based on Two-Photon Absorption in a semiconductor micro-cavity is presented.
Krug, T., Maguire, Paul, J., Donegan, John Francis, Folliot, Hervé, Donegan, J.F., Barry, Liam,, Bradley, A.L., Folliot, H., Lynch, M., Barry, Liam P., Lynch, Michael, Bradley, Ann Louise, Maguire, Paul,, Maguire, Paul J., Barry, Liam, P.   +14 more
core   +1 more source

Enhanced Raman scattering in graphene by plasmonic resonant Stokes emission

Nanophotonics, 2014
Exploiting surface plasmon polaritons to enhance interactions between graphene and light has recently attracted much interest. In particular, nonlinear optical processes in graphene can be dramatically enhanced and controlled by plasmonic nanostructures.
Ghamsari Behnood G., Olivieri Anthony, Variola Fabio, Berini Pierre   +3 more
doaj   +1 more source

Optical Enhancement by Gold Nanoring-Nanodisk Plasmonic Structures for Light Sensing Applications

Al-Mustansiriyah Journal of Science, 2022
We design and numerically model a 3D nanoring-nanodisk structure and evaluate the effect of the ring and the disk radii size within the presented structure on optical enhancement.
Ahmad Aziz Darweesh, Dhaidan Khalaf Kafi, Hamid Ahmed Fayyadh   +2 more
doaj   +1 more source

Enhancing Optical Gradient Forces with Metamaterials

Physical Review Letters, 2013
We demonstrate how the optical gradient force between two waveguides can be enhanced using transformation optics. A thin layer of double-negative or single-negative metamaterial can shrink the interwaveguide distance perceived by light, resulting in a more than tenfold enhancement of the optical force.
Ginis, Vincent, Tassin, Philippe, Soukoulis, Costas, Veretennicoff, Irina   +3 more
openaire   +5 more sources

Laser ablation initiated fast discharge for spectrochemical applications [PDF]

Hemijska Industrija, 2014
The results of an experimental study of the optical emission enhancement possibilities during the single pulse laser induced breakdown spectroscopy of the aluminum alloy are presented.
Vinić Milica L., Ivković Milivoje R.
doaj   +1 more source

EXCESS OPTICAL ENHANCEMENT OBSERVED WITH ARCONS FOR EARLY CRAB GIANT PULSES [PDF]

, 2013
We observe an extraordinary link in the Crab pulsar between the enhancement of an optical pulse and the timing of the corresponding giant radio pulse. At optical through infrared wavelengths, our observations use the high time resolution of ARray Camera ...
M. Strader, Michael D. Johnson, Ben Mazin, G. Jaeger, C. Gwinn, S. Meeker, P. Szypryt, J. V. Eyken, Danica Marsden, Kieran O'Brien, A. Walter, G. Ulbricht, Christopher Stoughton, B. Bumble   +13 more
semanticscholar   +1 more source

Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic [PDF]

, 2005
International audienceHigh-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the F-layer neutral oxygen causing artificial optical emissions identical to ...
F. T. Djuth, T. Pedersen, A. Senior, Hughes, J., Gerken, E., E. Gerken, Marshall, R., Pedersen, T., Senior, A., McCarrick, M., R. Marshall, Djuth, F. T., Kosch, M. J., M. J. Kosch, D. Sentman, J. Hughes, M. McCarrick, Sentman, D.   +17 more
core   +1 more source

Coupling configurations between extended surface electromagnetic waves and localized surface plasmons for ultrahigh field enhancement

Nanophotonics, 2018
Local enhancement of electromagnetic (EM) fields near dielectric and metallic surfaces is usually associated with the existence of a confined EM wave at least in one direction. This phenomenon finds applications in enhancing optical spectroscopic signals,
Abdulhalim Ibrahim
doaj   +1 more source