Results 71 to 80 of about 2,118,821 (229)

Plasmon assisted enhanced nonlinear refraction of monodispersed silver nanoparticles and their tunability.

Optics Express, 2014
Nonlinear optical characterizations were performed on monodispersed silver (Ag) nanoparticles (NPs) of various sizes using a picosecond Z-scan technique with excitation wavelengths of 532 nm and 1064 nm.
P. Lama, A. Suslov, A. Walser, R. Dorsinville   +3 more
semanticscholar   +1 more source

Bending of electromagnetic wave in an ultra-strong magnetic field

, 2012
We consider the bending of light by nonlinear electrodynamics when the magnetic field $B$ exceeds the critical value $B_{\rm c}$. Using the index of refraction derived from the analytic series representation in one-loop effective action of QED, we found ...
Kim, Jin Young
core   +1 more source

The convolution theorem for nonlinear optics

, 2007
We have expressed the nonlinear optical absorption of a semiconductor in terms of its linear spectrum. We determined that the two-photon absorption coefficient in a strong DC-electric field of a direct gap semiconductor can be expressed as the product of
Franz W., Hernando Garcia, Keldysh L., Ramki Kalyanaraman   +3 more
core   +1 more source

Collective refraction of a beam of electrons at a plasma-gas interface

Physical Review Special Topics. Accelerators and Beams, 2001
In a recent Brief Comment, the results of an experiment to measure the refraction of a particle beam were reported [P. Muggli et al., Nature 411, 43 (2001)]. The refraction takes place at a passive interface between a plasma and a gas.
P. Muggli, S. Lee, T. Katsouleas, R. Assmann, F. J. Decker, M. J. Hogan, R. Iverson, P. Raimondi, R. H. Siemann, D. Walz, B. Blue, C. E. Clayton, E. Dodd, R. A. Fonseca, R. Hemker, C. Joshi, K. A. Marsh, W. B. Mori, S. Wang   +18 more
doaj   +1 more source

Nonlinear switching of low-index defect modes in photonic lattices

, 2008
We address nonlinear signal switching between two low-index defect channels induced in periodic optical lattices. In contrast to conventional directional couplers, where the guiding mechanism is total internal reflection or refraction, in such Bragg-type
A. Yariv, Fangwei Ye, G. P. Agrawal, J. D. Joannopoulos, Lluis Torner, S. M. Jensen, Victor A. Vysloukh, Yaroslav V. Kartashov   +7 more
core   +1 more source

Anomalous Momentum States, Non-Specular Reflections, and Negative Refraction of Phase-Locked, Second Harmonic Pulses

, 2008
We simulate and discuss novel spatio-temporal propagation effects that relate specifically to pulsed, phase-mismatched second harmonic generation in a negative index material having finite length.
Agranovich, Aközbek, Armstrong, Beckwitt, Bloembergen, Boardman, Boyd, Centini, Conti, de Ceglia, Domenico de Ceglia, D’Aguanno, Fejer, Fejer, Franken, Fujioka, Gallo, Giordmaine, Glenn, Joseph W. Haus, Krylov, Liu, Maismitov, Maker, Maleck Rassoul, Manassah, Marco Centini, Maria Antonietta Vicenti, Mark J. Bloemer, Michael Scalora, Neset Akozbek, Noordam, Orlov, Petrov, Popov, Popov, Popov, Reid, Roppo, Sapaev, Scalora, Scalora, Scalora, Scalora, Shadrivov, Shapiro, Sidick, Steinbach, Su, Torner, Vito Roppo, Wang, Weber, Xu   +53 more
core   +1 more source

Transient thermal effect, nonlinear refraction and nonlinear absorption properties of graphene oxide sheets in dispersion.

Optics Express, 2013
The nonlinear refraction (NLR) properties of graphene oxide (GO) in N, N-Dimethylformamide (DMF) was studied in nanosecond, picosecond and femtosecond time regimes by Z-scan technique.
Xiao-Liang Zhang, Zhi-bo Liu, Xiao-chun Li, Q. Ma, Xu‐Dong Chen, Jianguo Tian, Yanfei Xu, Yongsheng Chen   +7 more
semanticscholar   +1 more source

Plasmon-exciton coupling in nanostructured metal-semiconductor composite films

AIP Advances, 2019
Nonlinear optical response of metal-semiconductor Zn0.8Co0.2O/Au nanocomposite films was studied experimentally and theoretically. Z-scan measurements revealed a positive nonlinear index of refraction of the composite film.
Viktoriia V. Savchuk, Roman V. Gamernyk, Ihor S. Virt, Serhiy Z. Malynych, Anatoliy O. Pinchuk   +4 more
doaj   +1 more source

Characteristics of nonlinear optical absorption and refraction for KDP and DKDP crystals

, 2017
High-quality KDP and DKDP crystals with 12%, 70% and 80%-deuterium content were grown by the conventional temperature cooling method. The nonlinear optical characteristics of K(DxH1-x)2PO4 crystals, including nonlinear absorption and refraction, were ...
Duanliang Wang, Tingbin Li, Shenglai Wang, Ji-yang Wang, Chuanying Shen, Jianxu Ding, Weidong Li, Pingping Huang, Chen Lu   +8 more
semanticscholar   +1 more source

Trirefringence in nonlinear metamaterials

, 2012
We study the propagation of electromagnetic waves in the limit of geometrical optics for a class of nearly transparent nonlinear uniaxial metamaterials for which their permittivity tensors present a negative principal component.
De Lorenci, Vitorio A., Pereira, Jonas P.   +1 more
core   +1 more source