scholarly journals An Extended k-Surface Framework for Electromagnetic Fields in Artificial Media

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7842
Author(s):  
Octavian Dănilă ◽  
Ana Bărar ◽  
Marian Vlădescu ◽  
Doina Mănăilă-Maximean
Keyword(s):  
Electromagnetic Fields ◽  
Second Harmonic ◽  
Nonlinear Effects ◽  
Complete Information ◽  
Negative Permittivity ◽  
Phase Matching ◽  
Complete Understanding ◽  
Tuning Curves ◽  
Permittivity And Permeability ◽  
Linear And Nonlinear

The complete understanding of the electromagnetic field characteristics in artificially created bulk or thin media is essential to the efficient harnessing of the multitude of linear and nonlinear effects resulting from it. Due to the fact that recently developed artificial metastructures exhibit controllable electric and magnetic properties that are completely different from natural ones, the spectrum of behavior resulting from subjecting such media to electromagnetic fields has to be revisited. In this paper, we introduce a k-surface framework that offers complete information on the dispersion properties of media with designer electric and magnetic responses with positive and negative values, as well as for the coupling between the two. The extension from the classic k-surface case resides in the consideration of magnetic and bianisotropic materials with positive and negative permittivity and permeability values, as well as the introduction of the chirality coefficient.To illustrate the applicability of our framework, we have investigated the conditions to obtain collinear second harmonic generation in the case of artificial media with positively and negatively valued electric and magnetic responses. As expected, the phase matching tuning curves, defined as the intersections between the k-surfaces at both frequencies, are significantly modified with respect to the classic ones.

Electronic Structure and Derived Linear and Nonlinear Optical Properties of Chalcopyrites

1999 ◽  
Vol 607 ◽  
Author(s):  
Walter R. L. Lambrecht ◽  
Sergey N. Rashkeev ◽  
Sukit Limpijumnong ◽  
Benjamin Segall
Keyword(s):  
Second Harmonic ◽  
Phase Matching ◽  
Orbital Method ◽  
Band Structures ◽  
Electronic Band ◽  
Critical Phase ◽  
Linear And Nonlinear ◽  
Interesting Compound ◽  
Indirect Band Gap ◽  
Electronic Band Structures

AbstractThe electronic band structures were calculated for a number of chalcopyrites in both the II-IV-V2 and I-III-VI2 families using the linear muffin-tin orbital method. From these band structures, the second harmonic generation coefficients were calculated using a recently developed methodology in which a separation is made of inter- and intraband contributions. We found that the high value of d36 in CdGeAs2 is in large part due to the fact, that in this material, unlike in the other chalcopyrites, almost no compensation occurs between inter- and intraband contributions, the former one being unusually small. For the case of ZnGeP2, a detailed investigation of the band structure, reveals that it has an indirect band gap rather than a pseudodirect one. The implications of this for the interpretation of the optical spectra are discussed. Finally, for the I-III-VI2 materials, we find that the Te based materials have far higher d36 than the selenides. Combined with their potential for non-critical phase matching, this makes AgGaTe2 an interesting compound.

Multilayer AlxGa1−xAs Heterostructures for Second-Harmonic Generation

1992 ◽  
Vol 281 ◽  
Author(s):  
S. Janz ◽  
F. Chatenoud ◽  
H. Dai ◽  
E. Vilks ◽  
M. Buchanan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Waveguides ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Phase Matching ◽  
Generation Efficiency ◽  
Material Parameters ◽  
Quasi Phase Matching ◽  
Order Of Magnitude ◽  
Linear And Nonlinear

ABSTRACTQuasi-phase matching in AlxGa1−xAs heterostructure optical waveguides can be used for efficient second-harmonic (SH) generation. The efficiency of these devices depends on the linear and nonlinear optical properties of the component materials. We present measurements of the SH susceptibility variation in AlxGa1−xAs with Al concentration, for fundamental light at λ = 1.06 μ. The measured SH susceptibility decreases by an order of magnitude as the Al concentration is varied from x = 0 to x = 0.97. These measurements are used to evaluate the SH generation efficiency of AlxGa1−xAs heterostructures as the structural and material parameters are varied.

scholarly journals Angular non-critical phase-matching second-harmonic-generation characteristics of RECOB (RE = Tm, Y, Gd, Sm, Nd and La) crystals

2017 ◽  
Vol 25 (10) ◽  
pp. 11867 ◽  
Author(s):  
Yanqing Liu ◽  
Zhengping Wang ◽  
Fapeng Yu ◽  
Hongwei Qi ◽  
Xiuqin Yang ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching ◽  
Critical Phase

scholarly journals Magnetically driven second-harmonic generation with phase matching in MnWO_4

2015 ◽  
Vol 23 (21) ◽  
pp. 27700 ◽  
Author(s):  
Naëmi Leo ◽  
Dennis Meier ◽  
Petra Becker ◽  
Ladislav Bohatý ◽  
Manfred Fiebig
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Phase Matching

Blue 473-nm solid state diode pumped Nd:YAG/BiBO microchip laser

2010 ◽  
Vol 18 (1) ◽  
Author(s):  
A. Antończak ◽  
J. Sotor ◽  
M. Matysiak ◽  
K. Abramski
Keyword(s):  
Blue Light ◽  
Second Harmonic ◽  
Nonlinear Crystal ◽  
Phase Matching ◽  
Type I ◽  
Pumping Power ◽  
Diode Pumped ◽  
Light Generation ◽  
Power Diode ◽  
Matching Type

AbstractIn this paper we present a design of a compact, low power diode-pumped CW Nd:YAG laser operating at 946 nm with intracavity blue light generation at 473 nm for battery operated applications. The nonlinear crystal used in the experiment is a BiBO crystal cut for phase-matching type I. Using 0.8 W of pumping power, 20-mW stabile output power of blue light was achieved. The second harmonic generation conversion efficiency was 2.5%.

scholarly journals Large acceptance of non-collinear phase-matching second harmonic generation on the surface of an anomalous-like bulk dispersion medium

2014 ◽  
Vol 22 (23) ◽  
pp. 28234 ◽  
Author(s):  
Xiaojing Wang ◽  
Huaijin Ren ◽  
Ning An ◽  
Xiaohui Zhao ◽  
Yuanlin Zheng ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Dispersion Medium ◽  
Second Harmonic ◽  
Phase Matching ◽  
Large Acceptance

Continuous wave second-harmonic generation using domain-disordered quasi-phase matching waveguides

2009 ◽  
Vol 94 (15) ◽  
pp. 151107 ◽  
Author(s):  
Sean J. Wagner ◽  
Barry M. Holmes ◽  
Usman Younis ◽  
Amr S. Helmy ◽  
J. Stewart Aitchison ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Continuous Wave ◽  
Second Harmonic ◽  
Phase Matching ◽  
Quasi Phase Matching

PRELIMINARY OPTICAL STUDY ON ER FLUIDS

1994 ◽  
Vol 08 (20n21) ◽  
pp. 2921-2933 ◽  
Author(s):  
L. W. ZHOU ◽  
J. F. YE ◽  
R. B. TAO ◽  
Y. TANG ◽  
J. F. PENG ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Electric Fields ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Optical Response ◽  
Optical Study ◽  
Solid States ◽  
Linear And Nonlinear ◽  
Er Fluids

Linear and nonlinear optical study on electrorheological (ER) fluids is reported. The ER fluids under the investigation were glass beads, zeolite and ferroelectrics. The linear optical response of some ER fluids showed sharp changes near critical electric fields. An enhancement of electric field induced second harmonic generations (EFISH) was observed as the function of E2, where E is the external electric field. The said enhancement is considered to be corresponding to a modulation of the material's refractive index associated with the electric field induced polarization of the delocalized electrons. The enhanced nonlinear optical response on the transition between liquid and solid states can be related to the phase transition in ER fluids.

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