Results 1 to 10 of about 275,683 (312)

Frequency comb generation threshold via second-harmonic excitation in χ(2) optical microresonators

APL Photonics, 2020
We investigate the threshold of χ(2) frequency comb generation in lithium niobate whispering gallery microresonators theoretically and experimentally. When generating a frequency comb via second-harmonic excitation, also commonly known as second-harmonic
Jan Szabados, Boris Sturman, Ingo Breunig   +2 more
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Interlayer exciton mediated second harmonic generation in bilayer MoS2

Nature Communications, 2021
Efficient second-harmonic generation (SHG) occurs for crystals with broken inversion symmetry, such as transition metal dichalcogenide monolayers. Here the authors show SHG tuning in bilayer MoS2 - an inversion-symmetric crystal - mediated by interlayer ...
Shivangi Shree, Delphine Lagarde, Laurent Lombez, Cedric Robert, Andrea Balocchi, Kenji Watanabe, Takashi Taniguchi, Xavier Marie, Iann C. Gerber, Mikhail M. Glazov, Leonid E. Golub, Bernhard Urbaszek, Ioannis Paradisanos   +12 more
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Second-harmonic generation of temporally low-coherence light

APL Photonics, 2020
In this Letter, we study the second-harmonic (SH) generation of temporally low-coherence light using the statistical optics method. By introducing the statistical characteristics of low-coherence light into the nonlinear coupled wave equation, we predict
Xiaohui Zhao, Lailin Ji, Dong Liu, Yanqi Gao, Daxing Rao, Yong Cui, Wei Feng, Fujian Li, Haitao Shi, Chong Shan, WeiXin Ma, Zhan Sui   +11 more
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H-ABC tubulinopathy revealed by label-free second harmonic generation microscopy

Scientific Reports, 2022
Hypomyelination with atrophy of the basal ganglia and cerebellum is a recently described tubulinopathy caused by a mutation in the tubulin beta 4a isoform, expressed in oligodendrocytes.
Milvia Alata, Valeria Piazza, Carla Jaramillo-Restrepo, Jose R. Eguibar, Carmen Cortes, Victor H. Hernandez   +5 more
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Optical Second Harmonic Generation of Low-Dimensional Semiconductor Materials

Nanomaterials
In recent years, the phenomenon of optical second harmonic generation (SHG) has attracted significant attention as a pivotal nonlinear optical effect in research. Notably, in low-dimensional materials (LDMs), SHG detection has become an instrumental tool
Yue Fu, Zhengyan Liu, Song Yue, Kunpeng Zhang, Ran Wang, Zichen Zhang   +5 more
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Conservation laws of generalized angular momentum by second-harmonic generation in underdense plasmas harmonic generation [PDF]

EPJ Web of Conferences
Light beams exhibit two intrinsic quantized degrees of freedom: spin angular momentum (SAM) and orbital angular momentum (OAM) whose manipulation enables precise control over the topological characteristics of electromagnetic fields. Recently, structured
Voisine Alexis, Béjot Pierre, Billard Franck, Marroux Hugo, Faucher Olivier, Hertz Edouard   +5 more
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Ultrabroadband Optical Phenomena in Quadratic Nonlinear Media

IEEE Photonics Journal, 2010
We present a comprehensive framework to study the nonlinear evolution of ultrabroadband optical pulses in quadratic nonlinear media. We employ a nonlinear envelope equation that goes beyond the traditional slowly varying approximation and allows ...
M. Conforti, F. Baronio, C. De Angelis
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Boosting and Taming Wave Breakup in Second Harmonic Generation

Frontiers in Physics, 2021
Modulation instability is a universal phenomenon that can be found in a wide variety of nonlinear systems where, in the presence of a noise seed, peaks of random intensities can be generated. Several dynamical systems admit exact solutions in the form of
Raphaël Jauberteau, Raphaël Jauberteau, Sahar Wehbi, Sahar Wehbi, Tigran Mansuryan, Katarzyna Krupa, Fabio Baronio, Benjamin Wetzel, Alessandro Tonello, Stefan Wabnitz, Vincent Couderc   +10 more
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Quadrupole second harmonic generation and sum-frequency generation in ZnO quantum dots

AIP Advances, 2015
The second harmonic generation (SHG) and the sum frequency generation (SFG) processes are investigated in the conduction band states of the singly charged ZnO quantum dot (QD) embedded in the HfO2, and the AlN matrices.
Deepti Maikhuri, S. P. Purohit, K. C. Mathur   +2 more
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X waves generated at the second harmonic [PDF]

Optics Letters, 2003
The process of optical frequency doubling in the undepleted regime can lead to the generation of an X-wave envelope with group velocity locked to the pump beam. Its parameters and its angular spectrum are directly related to the zeroth- and first-order dispersive features of the nonlinear process.
CONTI, CLAUDIO, Stefano Trillo
openaire   +2 more sources