Results 21 to 30 of about 32,634 (235)

Strong-field induced optical anisotropy in semiconductors with cubic structure: theory

open access: yesMaterials Research Express, 2020
A mechanism pertaining to an anomalous optical anisotropy under a strong field in semiconductors having cubic structure is proposed. The valence-conduction band transitions of valence electrons located around atomic bonds re-distribute electrons between ...
Adil-Gerai Kussow
doaj   +1 more source

Optical dipole anisotropy [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1987
La distribution de la lumiere a grande echelle est illustree a l'aide de cartes de 15000 galaxies optiques environ, basees sur les catalogues UGC, ESO et MCG. L'anisotropie dipolaire de la distribution des galaxies pointe vers l=227°±23°, b=42°±8°
openaire   +1 more source

Measuring mechanical anisotropy of the cornea with Brillouin microscopy

open access: yesNature Communications, 2022
Here, Brillouin optical microscopy noninvasively visualizes microscale anisotropy of the porcine cornea owing to its lamellar fiber structure and quantifies the longitudinal moduli of the bulk tissue.
Amira M. Eltony   +2 more
doaj   +1 more source

Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy

open access: yesnpj 2D Materials and Applications, 2021
Lengenbachite is a naturally occurring layered mineral formed with alternating stacks of two constituent PbS-like and M2S3-like two-dimensional (2D) material layers due to the phase segregation process during the formation.
Arindam Dasgupta, Xiaodong Yang, Jie Gao
doaj   +1 more source

Visualization of structural and textural changes in the newly formed snow layer during prolonged snowfall

open access: yesЛëд и снег, 2021
Observations were made on the dynamics of structural and textural transformations in the newly fallen snow layer during its transition to a stratigraphically significant snow accumulation layer.
M. P. Tentyukov
doaj   +1 more source

Optical diagnosis of gastric tissue biopsies with Mueller microscopy and statistical analysis

open access: yesJournal of the European Optical Society-Rapid Publications, 2022
We investigate a possibility of producing the quantitative optical metrics to characterize the evolution of gastric tissue from healthy conditions via inflammation to cancer by using Mueller microscopy of gastric biopsies, regression model and ...
Kim Myeongseop   +5 more
doaj   +1 more source

Magnetic tuning of liquid crystal dielectric metasurfaces

open access: yesNanophotonics, 2022
Dielectric metasurfaces hold an exceptional potential for the next generation of tunable optical systems that find applications in sensing, ranging, and imaging.
Izdebskaya Yana V.   +6 more
doaj   +1 more source

Optical anisotropy in GaSe

open access: yesCrystal Research and Technology, 2005
AbstractOptical anisotropy of the layer semiconductor GaSe has been studied by photoluminescence (PL) and Fourier Transform Infrared Spectroscopy (FTIR). The PL spectra are dominated by two closely positioned emission bands resulting from the free exciton and the bound exciton connected direct band edge of GaSe.
Seyhan, A.   +4 more
openaire   +4 more sources

In Vitro Assessment of Optical Properties of Blood by Applying the Extended Huygens-Fresnel Principle to Time-Domain Optical Coherence Tomography Signal at 1300 nm

open access: yesInternational Journal of Biomedical Imaging, 2008
A direct method for the measurement of the optical attenuation coefficient and the scattering anisotropy parameter based on applying the extended Huygens-Fresnel principle to optical coherence tomography images of blood is demonstrated.
Dan P. Popescu, Michael G. Sowa
doaj   +1 more source

Ultrafast Modulation of Magnetization Dynamics in Ferromagnetic (Ga, Mn)As Thin Films

open access: yesApplied Sciences, 2018
Magnetization precession induced by linearly polarized optical excitation in ferromagnetic (Ga,Mn)As was studied by time-resolved magneto-optical Kerr effect measurements. The superposition of thermal and non-thermal effects arising from the laser pulses
Hang Li   +4 more
doaj   +1 more source

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