Influence of the Quadratic Magnetooptical Effect on Light Propagation in Garnet Films

1974 ◽  
Vol 13 (9) ◽  
pp. 2007 ◽  
Author(s):  
G. Hepner ◽  
B. Désormière
Keyword(s):  
Light Propagation ◽  
Garnet Films ◽  
Magnetooptical Effect

Growth and Characterization of Magnetooptic Garnet Films with Planar Uniaxial Anisotropy

2004 ◽  
Vol 834 ◽  
Author(s):  
Vincent J. Fratello ◽  
Irina Mnushkina ◽  
Steven J. Licht ◽  
Robert R. Abbott
Keyword(s):  
Thick Film ◽  
Light Propagation ◽  
Film Growth ◽  
Uniaxial Anisotropy ◽  
Magnetic Field Sensors ◽  
Planar Domains ◽  
Garnet Films ◽  
Optical Attenuators ◽  
Variable Optical Attenuators ◽  
Insertion Losses

ABSTRACTThick film garnet Faraday rotators with perpendicular anisotropy have limited utility for variable polarization rotation applications because multi-domain effects result in large effective insertion losses in device applications. Thick film growth of (BiGdLu)3(FeGaAl)5O12 on (100) substrates yields growth-induced anisotropies ranging from positive anisotropy perpendicular domains to negative anisotropy in-plane domains. Planar domains show variable magnetization by domain rotation with a uniform projection of magnetization along the axis of light propagation. This can produce low-loss devices when operated in sub-saturation applications such as magnetic field sensors, variable optical attenuators and polarization controllers.

Novel magneto-optical recording materials: Bi-substituted garnet films

1991 ◽  
Vol 49 ◽  
pp. 776-777
Author(s):  
Takao Suzuki ◽  
Hossein Nuri
Keyword(s):  
Grain Size ◽  
Amorphous Film ◽  
Nitrogen Atmosphere ◽  
Optical Recording ◽  
Garnet Film ◽  
Media Noise ◽  
Garnet Films ◽  
Order Of Magnitude ◽  
A New Technique ◽  
A Current

For future high density magneto-optical recording materials, a Bi-substituted garnet film ((BiDy)3(FeGa)5O12) is an attractive candidate since it has strong magneto-optic effect at short wavelengths less than 600 nm. The signal in read back performance at 500 nm using a garnet film can be an order of magnitude higher than a current rare earth-transition metal amorphous film. However, the granularity and surface roughness of such crystalline garnet films are the key to control for minimizing media noise.We have demonstrated a new technique to fabricate a garnet film which has much smaller grain size and smoother surfaces than those annealed in a conventional oven. This method employs a high ramp-up rate annealing (Γ = 50 ~ 100 C/s) in nitrogen atmosphere. Fig.1 shows a typical microstruture of a Bi-susbtituted garnet film deposited by r.f. sputtering and then subsequently crystallized by a rapid thermal annealing technique at Γ = 50 C/s at 650 °C for 2 min. The structure is a single phase of garnet, and a grain size is about 300A.

Holographic moving picture recording and observation of ultrashort pulsed laser light propagation

2008 ◽  
Vol 36 (Supplement) ◽  
pp. 201-202
Author(s):  
Yasuhiro Awatsuji ◽  
Kenzo Nishio ◽  
Shogo Ura ◽  
Toshihiro Kubota
Keyword(s):  
Light Propagation ◽  
Laser Light ◽  
Pulsed Laser ◽  
Ultrashort Pulsed Laser

Observation of parametric amplification of propagating dipole-exchange spin waves in yttrium iron garnet films

JETP Letters ◽  
1996 ◽  
Vol 64 (3) ◽  
pp. 171-176 ◽  
Author(s):  
B. A. Kalinikos ◽  
N. G. Kovshikov ◽  
M. P. Kostylev ◽  
H. Benner
Keyword(s):  
Yttrium Iron Garnet ◽  
Spin Waves ◽  
Parametric Amplification ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Iron Garnet ◽  
Dipole Exchange

scholarly journals OAM light propagation through tissue

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Netanel Biton ◽  
Judy Kupferman ◽  
Shlomi Arnon
Keyword(s):  
Light Propagation ◽  
Biological Imaging ◽  
Gaussian Beams ◽  
Medical Implants ◽  
Optical Wireless ◽  
Scattering Media ◽  
Valuable Contribution ◽  
Light Beams ◽  
First Time ◽  
Diffuse Media

AbstractA major challenge in use of the optical spectrum for communication and imaging applications is the scattering of light as it passes through diffuse media. Recent studies indicate that light beams with orbital angular momentum (OAM) can penetrate deeper through diffuse media than simple Gaussian beams. To the best knowledge of the authors, in this paper we describe for the first time an experiment examining transmission of OAM beams through biological tissue with thickness of up to a few centimeters, and for OAM modes reaching up to 20. Our results indicate that OAM beams do indeed show a higher transmittance relative to Gaussian beams, and that the greater the OAM, the higher the transmittance also up to 20, Our results extend measured results to highly multi scattering media and indicate that at 2.6 cm tissue thickness for OAM of order 20, we measure nearly 30% more power in comparison to a Gaussian beam. In addition, we develop a mathematical model describing the improved permeability. This work shows that OAM beams can be a valuable contribution to optical wireless communication (OWC) for medical implants, optical biological imaging, as well as recent innovative applications of medical diagnosis.

scholarly journals Double accumulation and anisotropic transport of magnetoelastic bosons in yttrium iron garnet films

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Pascal Frey ◽  
Dmytro A. Bozhko ◽  
Victor S. L'vov ◽  
Burkard Hillebrands ◽  
Alexander A. Serga
Keyword(s):  
Yttrium Iron Garnet ◽  
Yttrium Iron ◽  
Garnet Films ◽  
Anisotropic Transport ◽  
Iron Garnet
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