Investigation of the Mechanism of Terahertz Radiation from InAs under Magnetic Fields

2006 ◽  
Author(s):  
Hisashi Sumikura ◽  
Tokujiro Enatsu ◽  
Akira Kiyoi ◽  
Takeshi Nagashima ◽  
Masahiko Tani ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Terahertz Radiation

Anomalous power and spectrum dependence of terahertz radiation from femtosecond-laser-irradiated indium arsenide in high magnetic fields up to 14 T

2003 ◽  
Vol 82 (8) ◽  
pp. 1164-1166 ◽  
Author(s):  
Hideyuki Ohtake ◽  
Hidetoshi Murakami ◽  
Takayuki Yano ◽  
Shingo Ono ◽  
Nobuhiko Sarukura ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Femtosecond Laser ◽  
Indium Arsenide ◽  
Terahertz Radiation ◽  
High Magnetic Fields

Terahertz radiation spectrum emitted from InAs under the existence of magnetic fields up to 27 T

2004 ◽  
Author(s):  
Hiroshi Takahashi ◽  
Alex Quema ◽  
Masahiro Goto ◽  
Shingo Ono ◽  
Nobuhiko Sarukura ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Terahertz Radiation ◽  
Radiation Spectrum

Calculated Coronal Magnetic Fields and Their Comparison with the Coronal Structures as Observed during Five Solar Eclipses

1994 ◽  
Vol 144 ◽  
pp. 559-564
Author(s):  
P. Ambrož ◽  
J. Sýkora
Keyword(s):  
Magnetic Field ◽  
Solar Cycle ◽  
Magnetic Fields ◽  
Solar Corona ◽  
Coronal Magnetic Field ◽  
Coronal Magnetic Fields ◽  
Solar Eclipses ◽  
Coronal Structures

AbstractWe were successful in observing the solar corona during five solar eclipses (1973-1991). For the eclipse days the coronal magnetic field was calculated by extrapolation from the photosphere. Comparison of the observed and calculated coronal structures is carried out and some peculiarities of this comparison, related to the different phases of the solar cycle, are presented.

Radio Measurements of Coronal Magnetic Fields

1994 ◽  
Vol 144 ◽  
pp. 21-28 ◽  
Author(s):  
G. B. Gelfreikh
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Solar Corona ◽  
Active Regions ◽  
High Sensitivity ◽  
Coronal Magnetic Field ◽  
Transverse Magnetic ◽  
Radio Sources ◽  
Radio Waves ◽  
Solar Active Regions

AbstractA review of methods of measuring magnetic fields in the solar corona using spectral-polarization observations at microwaves with high spatial resolution is presented. The methods are based on the theory of thermal bremsstrahlung, thermal cyclotron emission, propagation of radio waves in quasi-transverse magnetic field and Faraday rotation of the plane of polarization. The most explicit program of measurements of magnetic fields in the atmosphere of solar active regions has been carried out using radio observations performed on the large reflector radio telescope of the Russian Academy of Sciences — RATAN-600. This proved possible due to good wavelength coverage, multichannel spectrographs observations and high sensitivity to polarization of the instrument. Besides direct measurements of the strength of the magnetic fields in some cases the peculiar parameters of radio sources, such as very steep spectra and high brightness temperatures provide some information on a very complicated local structure of the coronal magnetic field. Of special interest are the results found from combined RATAN-600 and large antennas of aperture synthesis (VLA and WSRT), the latter giving more detailed information on twodimensional structure of radio sources. The bulk of the data obtained allows us to investigate themagnetospheresof the solar active regions as the space in the solar corona where the structures and physical processes are controlled both by the photospheric/underphotospheric currents and surrounding “quiet” corona.

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