Results 51 to 60 of about 57,281 (193)

ACOUSTIC BIREFRINGENCE AT ELECTROMAGNETIC EXCITATION OF SOUND IN IRON BORATE CRYSTALS [PDF]

Радиофизика и электроника, 2016
High temperature antiferromagnets such as iron borate, hematite etc., have high magnetoelastic coupling. As a result, in the conditions of birefringence effect, there is a possibility to control parameters of sound waves by a small external magnetic ...
V. I. Khizhnyi, A. P. Korolyuk, T. M. Khizhnaya   +2 more
doaj   +1 more source

Magnetic and electric properties of quantum vacuum

, 2012
In this report we show that vacuum is a nonlinear optical medium and we discuss what are the optical phenomena that should exist in the framework of the standard model of particle physics. We pay special attention to the low energy limit.
Battesti, Rémy, Rizzo, Carlo
core   +4 more sources

Bayesian Analysis of the Polarization of Distant Radio Sources: Limits on Cosmological Birefringence [PDF]

, 1997
A recent study of the rotation of the plane of polarization of light from 160 cosmological sources claims to find significant evidence for cosmological anisotropy.
A. C. Genz, B. Nodland, D. J. Eisenstein, Eanna E. Flanagan, H. Jeffreys, Ira M. Wasserman, J. F. C. Wardle, K. V. Mardia, N. I. Fisher, P. C. Gregory, S. M. Carroll, Thomas J. Loredo   +11 more
core   +2 more sources

Suspension of the fiber mode-cleaner launcher and measurement of the high extinction-ratio (10^{-9}) ellipsometer for the Q & A experiment

, 2006
The Q & A experiment, first proposed and started in 1994, provides a feasible way of exploring the quantum vacuum through the detection of vacuum birefringence effect generated by QED loop diagram and the detection of the polarization rotation effect ...
and Wei-Tou Ni, Anselm A A, Cantatore G, Chen S-J, Chen S-J, Chen S-J, Chen S-J, Euler E, Hsien-Hao Mei, Nezrick F, Ni W-T, Ni W-T, Ni W-T, Ni W-T, Pedrotti F, Pengo R, Rizzo C, Sheng-Jui Chen, Takubo Y, Wu J-S, Zavattini E   +20 more
core   +1 more source

Highly Birefringent, Low-Loss, and Near-Zero Flat Dispersion ENZ Based THz Photonic Crystal Fibers

IEEE Photonics Journal, 2020
In this paper, we present and compare two experimentally feasible photonic crystal fiber (PCF) designs ($\textit{Type-I}$ and $\textit{Type-II}$) which ensure near-zero flattened dispersion with ultra-high phase and group birefringence at THz frequencies.
Md. Shahjalal Hossain, S. M. Abdur Razzak, Christos Markos, Nguyen Hoang Hai, Md. Selim Habib, Md. Samiul Habib   +5 more
doaj   +1 more source

Investigation of highly birefringent and highly nonlinear Hexa Sectored PCF with low confinement loss

Results in Physics, 2018
A novel design of Hexa Sectored Photonic Crystal Fiber (HS-PCF) with high nonlinearity and high birefringence has been revealed in this paper where core is slotted and filled with Gallium Phosphide (GaP). Finite Element Method has been used for numerical
Md Toaha Anas, Sayed Asaduzzaman, Kawsar Ahmed, Touhid Bhuiyan   +3 more
doaj   +1 more source

A polarisation modulation scheme for measuring vacuum magnetic birefringence with static fields [PDF]

, 2016
A novel polarisation modulation scheme for polarimeters based on Fabry-Perot cavities is presented. The application to the proposed HERA-X experiment aiming to measuring the magnetic birefringence of vacuum with the HERA superconducting magnets is ...
Della Valle, F., Ejlli, A., Ruoso, G., Zavattini, G.   +3 more
core   +3 more sources

Cooling-Rate Induced Fiber Birefringence Variation In Regenerated High Birefringent Fiber

, 2015
In this paper, we have reported birefringence manipulation in regenerated high birefringent fiber Bragg grating (RPMG) by using CO2 laser annealing method. The results indicate that the birefringence of RPMG remains unchanged after CO2 laser annealing followed by slow cooling process, but reduced after fast cooling process (~5.6×10-5).
M. H. Lai, D. S. Gunawardena, K. S. Lim, H. Ahmad   +3 more
openaire   +1 more source

Measurement of the Cotton Mouton effect of water vapour

, 2013
In this paper we report on a measurement of the Cotton Mouton effect of water vapour. Measurement performed at room temperature ($T=301$ K) with a wavelength of 1064 nm gave the value $\Delta n_u = (6.67 \pm 0.45) \cdot 10^{-15}$ for the unit magnetic ...
Della Valle, F., Ejlli, A., Gastaldi, U., Messineo, G., Milotti, E., Pengo, R., Piemontese, L., Ruoso, G., Zavattini, G.   +8 more
core   +1 more source

Low Loss and High Polarization-Maintaining Single-Mode Hollow-Core Anti-Resonant Fibers with S+C+L+U Communication Bands

Photonics
In this paper, a low loss and high polarization-maintaining single-mode hollow-core anti-resonant fiber (PM-HC-ARF) is designed. The elliptical core in the PM-HC-ARF is formed by strategically enlarging selected cladding air holes along the y-axis ...
Hongxiang Xu, Yuan Yang, Jinhui Yuan, Dongxin Wu, Yilin Huang, Shengbao Luo, Zhiyong Ren, Changming Xia, Jiantao Liu, Guiyao Zhou, Zhiyun Hou   +10 more
doaj   +1 more source