Results 31 to 40 of about 299,866 (288)

Plasma-Grating-Enabled Second Harmonic Generation

Ultrafast Science
We present the experimental features of second harmonic emission from an air plasma coexcited by 2 ultrafast laser pulses and propose a theoretical model that describes the observed properties.
Shing Yiu Fu, Daopeng Yuan, X.-C. Zhang
doaj   +1 more source

Nonlinear plasmonics: second-harmonic generation and multiphoton photoluminescence

PhotoniX, 2023
The study on the nonlinear optical responses arising from plasmonic nanoantennas, known as nonlinear plasmonics, has been massively investigated in recent years.
Jiyong Wang, Lei Zhang, Min Qiu
doaj   +1 more source

Electric-field-induced second-harmonic generation

Opto-Electronic Advances
Second-harmonic generation (SHG) is a fundamental nonlinear optical process widely used in photonics; however, it is strictly forbidden in the bulk of centrosymmetric materials due to their inversion symmetry.
Hangkai Fan, Alexey Proskurin, Mingzhao Song, Andrey Bogdanov   +3 more
doaj   +1 more source

Second Harmonic Generation in Gapped Graphene

, 2013
The second-order nonlinear optical susceptibility $\Pi^{(2)}$ for second harmonic generation is calculated for gapped graphene. The linear and second-order nonlinear plasmon excitations are investigated in context of second harmonic generation (SHG).
Abranyos, Yonatan, Aparajita, Upali, Gumbs, Godfrey, Roslyak, Oleksiy   +3 more
core   +1 more source

Entanglement properties of third harmonic generation via direct and cascaded parametric processes [PDF]

, 2017
We compare the bipartite entanglement and EPR-steering properties of the two different schemes which produce third harmonic optical fields from an input field at the fundamental frequency. The first scheme uses second harmonic cascaded with sum-frequency
Olsen, M. K.
core   +2 more sources

Second-harmonic generation in graded metallic films

, 2005
We study the effective second-harmonic generation (SHG) susceptibility in graded metallic films by invoking the local field effects exactly, and further numerically demonstrate that the graded metallic films can serve as a novel optical material for ...
Chiang, Fischer, Grüll, Hui, Hui, Hui, J. P. Huang, K. W. Yu, Lu, Neeves, Pettinger, Pezzetta, Purvinis   +12 more
core   +1 more source

A New Bound on Excess Frequency Noise in Second Harmonic Generation in PPKTP at the 10^-19 Level [PDF]

, 2012
We report a bound on the relative frequency fluctuations in nonlinear second harmonic generation. A 1064nm Nd:YAG laser is used to read out the phase of a Mach-Zehnder interferometer while PPKTP, a nonlinear crystal, is placed in each arm to generate ...
Armstrong, Coddington, D. Yeaton-Massey, Fortier, Grosche, Heinert, Khalili, Leonhardt, Levin, Ma, Mullavey, R. X. Adhikari, Rosenband, Stalnaker, Stenger, Terra, Willke, Zang   +17 more
core   +2 more sources

Interferometric second harmonic generation microscopy

Optics Express, 2004
We describe a novel second harmonic generation (SHG) microscope that employs heterodyne detection by interfering the epi directed SHG from a sample with SHG from a reference crystal. In addition, the microscope provides complementary reflectance information based on optical coherence microscopy (OCM).
Siavash, Yazdanfar, Lily, Laiho, Peter, So   +2 more
openaire   +2 more sources

Enhanced second harmonic generation from resonant GaAs gratings

, 2011
We study second harmonic generation in nonlinear, GaAs gratings. We find large enhancement of conversion efficiency when the pump field excites the guided mode resonances of the grating.
Armstrong, Centini, Cowan, D. de Ceglia, D’Aguanno, Fano, Fejer, G. D’Aguanno, Hessel, M. A. Vincenti, M. Scalora, Mlejnek, Mondia, N. Mattiucci, Purvinis, Rayleigh, Roppo, Saari, Scalora, Siltanen, Wang, Wood, Wood   +22 more
core   +1 more source

Ultrafast Plasmonic Control of Second Harmonic Generation

, 2016
Efficient frequency conversion techniques are crucial to the development of plasmonic metasurfaces for information processing and signal modulation.
Avanesyan, Sergey M., Davidson II, Roderick B., Haglund Jr, Richard F., Lawrie, Ben J., Yanchenko, Anna, Ziegler, Jed I.   +5 more
core   +2 more sources