Results 31 to 40 of about 63,654 (313)

Experimental and theoretical study of second and third harmonic generation in amorphous silicon

, 2022
We report contrasted experimental and theoretical results on second and third harmonic generation from an amorphous silicon nanolayer. We perform this study by analysing the harmonic optical signals generated when fs and ps pulses tuned at 800nm and ...
Scalora, Michael, Trull Silvestre, José Francisco, Vilaseca Alavedra, Ramon, Rodríguez Suñé, Laura, Cojocaru, Crina, Akozbek, Neset   +5 more
core   +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

Optical second harmonic generation at heterojunction interfaces of a molybdenum trioxide layer and an organic layer [PDF]

, 2010
We have observed optical second harmonic generation (SHG) from a space charge layer (SCL) in a stacked indium tin oxide (ITO)/molybdenum trioxide (MoO_3)/N−N′-diphenyl-N−N′-bis(1-naphthly)-1,1′-biphenyl-4,4′-diamine (α-NPD) system.
Mizutani, G., A. B. El Basaty, Murata, H., G. Mizutani, Basaty, A. B. EL, H. Murata, T. Matsushima, Miyauchi, Y., Matsushima, T., Y. Miyauchi   +9 more
core   +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 confocal microscopy of collagen type I from rat tendon cryosections

, 2006
We performed second harmonic generation (SHG) imaging of collagen in rat-tendon cryosections, using femtosecond laser scanning confocal microscopy, both in backscattering and transmission geometries.
Theodossiou, Theodossis A., Thrasivoulou, C, Chidi Ekwobi, Ekwobi, Chidi, Theodossiou, TA, Becker, DL, Becker, David L., David L. Becker, Christopher Thrasivoulou, Thrasivoulou, Christopher, Theodossis A. Theodossiou, Ekwobi, C   +11 more
core   +1 more source

Second-harmonic generation from singular metasurfaces

, 2022
We present a theoretical study of second-harmonic generation from a singular metasurface. The singular metasurfaces strongly interact with the incident light, where the large field enhancement forms an intense surface polarization that generates the ...
Fan Yang (1413), Cristian Ciracì (14358156)   +1 more
core   +1 more source

Optical Second Harmonic Generation Analysis of Unrubbed Polyimide Surfaces as a Function of the Content of Steroidal Structure Side Chains [PDF]

, 2020
Contribution of main chains and side chains of unrubbed polyimide films with steroidal structure side chains to second harmonic generation (SHG) response was studied by varying their molar fraction of side-chain diamine.
Okada, Takashi, Asakura, Shinya, Murakami, Yoshitaka, Nguyen, Trinh Thi, Mizutani, Goro, Yu, Sheng, Khuat, Thi Thu Hien   +6 more
core   +1 more source

Second Harmonic Generation in a Photonic Crystal [PDF]

Optics and Photonics News, 1997
Phase matched second harmonic generation is observed experimentally in a centrosymmetric crystalline lattice of dielectric spheres of optical dimensions. The inversion symmetry is broken locally at the surface of each sphere in such a way that the scattered second harmonic light interferes constructively leading to a nonvanishing macroscopic field ...
Martorell, Jordi, Vilaseca, Ramon, Corbalán, Ramón, American Physical Society   +3 more
openaire   +4 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Strong-field-assisted x-ray second harmonic generation

Physical Review Research
We theoretically demonstrate x-ray second harmonic generation (SHG) with strong-field-driven high harmonic generation (HHG) from core electrons in gas-phase atoms, highlighting its potential as a powerful spectroscopic tool for studying atomic and ...
Xinhua Xie (谢新华)
doaj   +1 more source