Results 21 to 30 of about 5,194,279 (273)

Temperature dependence of LiTaO3 refractive index: Correction of Sellmeier equation [PDF]

EPJ Web of Conferences, 2023
We report a new and more precise Sellmeier equation derived using the quasi-phase-matching curves obtained from the study of the optical parametric generation (OPG) in 1D periodically poled LiTaO3 (1D-PPLT) of different periods at low and high pump power.
Mohand ousaid Safia, Chang Kai-H., Peng Lung-H., Boudrioua Azzedine   +3 more
doaj   +1 more source

Asymmetric Quantum Steering Generated by Triple-Photon Down-Conversion Process With Injected Signals

Frontiers in Physics, 2022
Asymmetric quantum steering generated by the triple-photon down-conversion process in an injected signal optical cavity is investigated. The triple-photon down-conversion process can be realized in an optical superlattice by quasi-phase-matching ...
T. H. Chen, K. Y. Pan, C. Xiao, Y. B. Yu, A. X. Chen   +4 more
doaj   +1 more source

Difference frequency generation by quasi-phase matching in periodically intermixed semiconductor superlattice waveguides [PDF]

, 2011
Wavelength conversion by difference frequency generation is demonstrated in domain-disordered quasi-phase-matched waveguides. The waveguide structure consisted of a GaAs/AlGaAs superlattice core that was periodically intermixed by ion implantation.
David C. Hutchings, Helmy, A.S., Sean J. Wagner, Iliya Sigal, Wagner, S.J., Younis, U., Sigal, I., Holmes, B.M., Amr S. Helmy, Hutchings, D.C., Barry M. Holmes, Usman Younis, Aitchison, S.J., J. Stewart Aitchison   +13 more
core   +1 more source

Observation of Neutron-Induced Absorption and Phase-Mismatch for Quasi-Phase-Matched Second Harmonic Generation in Congruent Lithium Niobate

Photonics, 2022
We report an experimental observation of radiation-induced optical absorption in undoped congruent lithium niobate (LiNbO3) crystals between the 190 nm and 3200 nm wavelength range.
An-Chung Chiang, Jiunn-Hsing Chao, Shou-Tai Lin, Yuan-Yao Lin   +3 more
doaj   +1 more source

Efficient Third-Harmonic Generation by Inhomogeneous Quasi-Phase-Matching in Quadratic Crystals

Photonics, 2023
We investigate the generation of optical third-harmonic frequency in quadratic crystals with a nonlinear domain lattice optimized with the aid of a random number generator.
Obid I. Sabirov, Gaetano Assanto, Usman K. Sapaev   +2 more
doaj   +1 more source

Broadband Mie-driven random quasi-phase-matching

, 2020
High-quality crystals without inversion symmetry are the conventional platform to achieve optical frequency conversion via three wave-mixing. In bulk crystals, efficient wave-mixing relies on phase-matching configurations, while at the micro- and nano ...
Rachel Grange (1670818), Fabian Kaufmann (12985160), Lucio Isa (1439527), Andrea Morandi (197245), Michele Zanini (1439506), Romolo Savo (12744305), Marc Reig Escalé (14390355), Jolanda S. Müller (17515749), Flavia Timpu (3604799)   +8 more
core   +1 more source

Quasi-phase matching of harmonics generating in laser plasmas: experiment and theory [PDF]

EPJ Web of Conferences, 2019
We compare the results of experimental and theoretical studies of the quasi-phase matching (QPM) of high-order harmonic generation (HHG) during propagation of two-color femtosecond pulses through the indium multi-jet plasmas.
Stremoukhov Sergey, Ganeev Rashid, Andreev Anatoli   +2 more
doaj   +1 more source

A Novel Four-Arm Planar Spiral Antenna for GNSS Application

IEEE Access, 2021
This letter introduces a novel four-arm planar spiral antenna which provides a perfect circular polarization radiation for Global Navigation Satellite System applications. The antenna mainly consists of four parts: an Archimedes spiral radiation area, an
Lili Guo, Peihua Zhang, Fanchao Zeng, Zhiya Zhang, Chengbin Zhang   +4 more
doaj   +1 more source

Spatiotemporal phase-matching in capillary high-harmonic generation [PDF]

, 2012
We present a simple phase-matching model that takes into account the full spatiotemporal nature of capillary high-harmonic generation. Spectra predicted from the model are compared to experimental results for a number of gases and are shown to reproduce ...
Rogers, Edward T.F., Praeger, M., Brocklesby, W. S., Grant-Jacob, James, Stebbings, Sarah L., Frey, Jeremy G., Rogers, E. T. F., de Paula, A., Rogers, E., de Paula, Ana M., Froud, C. A., Froud, Christopher A., Brocklesby, William S., Mills, Benjamin, Grant-Jacob, J., Frey, J. G., Praeger, Matthew, Mills, B., Frey, J., de Paula, A. M., Stebbings, S., Froud, C., Brocklesby, W.   +22 more
core   +1 more source

Quasi-phase-matched up- and down-conversion in periodically poled layered semiconductors

, 2023
Nonlinear optics lies at the heart of classical and quantum light generation. The invention of periodic poling revolutionized nonlinear optics and its commercial applications by enabling robust quasi-phase-matching in crystals such as lithium niobate ...
Lee A. Rozema (3961472), Carino Ferrante (1790193), D. N. Basov (1394467), Jiwoong Park (1661347), Cory Dean (17627715), Philipp K. Jenke (14414724), Philip Walther (13102902), Benjamin Braun (9362041), Andrea Marini (1424374), Xinyi Xu (505530), P. James Schuck (1285905), Milan Delor (1293426), Zhi Hao Peng (17627712), Chiara Trovatello (9930363), Giulio Cerullo (118912), Josip Bajo (14388378), Andrew Ye (8996177), Birui Yang (17627709)   +17 more
core   +1 more source