|
Records |
Links |
|
Author |
Bespalov, A.V.; Gol'tsman, G.N.; Semenov, A.D.; Renk, K.F. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Determination of the far-infrared emission characteristic of a cyclotron p-germanium laser by use of a superconducting Nb detector |
Type |
Journal Article |
|
Year |
1991 |
Publication |
Solid State Communications |
Abbreviated Journal |
Solid State Communications |
|
|
Volume |
80 |
Issue |
7 |
Pages |
503-506 |
|
|
Keywords |
Nb detector, applications |
|
|
Abstract |
We studied the far-infrared emission characteristics of a cyclotron p-germanium laser using a broad-band superconducting Nb film detector. For magnetic fields between ∼25 kOe and ∼50 kOe, emission in a frequency range from ∼50 cm-1 to ∼100 cm-1 with maximum intensity around 90 cm-1 was obtained. We determined, for fixed magnetic fields, electric field dependences of the emission intensity taking into account that the total electric field is a sum of the applied and the Hall electric field. An analysis of the emission intensity characteristic gives evidence that transitions between the two lowest Landau levels of light holes are responsible for the laser action. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0038-1098 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved ![sorted by Approved field, ascending order (up)](img/sort_asc.gif) |
no |
|
|
Call Number |
|
Serial |
1677 |
|
Permanent link to this record |
|
|
|
|
Author |
Lang, P. T.; Leipold, I.; Knott, W. J.; Semenov, A. D.; Gol'tsman, G. N.; Renk, K. F. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
New far-infrared laser lines from CH3Cl and CH3Br optically pumped with a continuously tunable high pressure CO2 laser |
Type |
Journal Article |
|
Year |
1991 |
Publication |
Appl. Phys. B |
Abbreviated Journal |
Appl. Phys. B |
|
|
Volume |
53 |
Issue |
4 |
Pages |
207-212 |
|
|
Keywords |
CO2 IR lasers, applications, CH3Cl, CH3Br |
|
|
Abstract |
In this paper we report on the detection of new far-infrared laser lines from CH3Cl and CH3Br optically pumped with a continuously tunable high pressure CO2 laser. We found 80 new lines for CH3Cl and 9 new lines for CH3Br in the frequency region between 16 cm−1 and 41 cm−1, all due to stimulated Raman scattering. For the Raman gain regions bandwidths up to about 700 MHz were found. We also observed high intensity short far-infrared laser pulses of durations in the nanosecond regime. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0721-7269 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved ![sorted by Approved field, ascending order (up)](img/sort_asc.gif) |
no |
|
|
Call Number |
|
Serial |
1678 |
|
Permanent link to this record |
|
|
|
|
Author |
Gershenzon, E. M.; Gol’tsman, G. N.; Semenov, A. D.; Sergeev, A. V. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Mechanism of picosecond response of granular YBaCuO films to electromagnetic radiation |
Type |
Journal Article |
|
Year |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
|
|
Volume |
27 |
Issue |
2 |
Pages |
1321-1324 |
|
|
Keywords |
YBCO HTS detectors |
|
|
Abstract |
Ultrafast mechanisms of radiation detection in granular YBaCuO films are studied in the wide wavelength range from millimeter waves to near infrared. With an increase in radiation frequency, the Josephson detection at the grain-boundary weak links is replaced by electron heating into the grains. This change occurs in the submillimeter wavelength range. The electron-phonon relaxation time tau /sub eph/ is determined from direct measurements, quasi-stationary electron heating measurements, and the frequency dependence of the current at which maximum voltage shift is observed. The temperature dependence of tau /sub eph/ at T<or=40 K was found to be tau /sub eph/ approximately T/sup -1/. The results show that detectors with a response time of a few picoseconds at nitrogen temperature are attainable. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
1941-0069 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved ![sorted by Approved field, ascending order (up)](img/sort_asc.gif) |
no |
|
|
Call Number |
|
Serial |
1679 |
|
Permanent link to this record |
|
|
|
|
Author |
Gershenzon, E. M.; Gol’tsman, G. N.; Dzardanov, A. L.; Zorin, M. A. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Ultrafast superconductive switch |
Type |
Journal Article |
|
Year |
1991 |
Publication |
IEEE Trans. Magn. |
Abbreviated Journal |
IEEE Trans. Magn. |
|
|
Volume |
27 |
Issue |
2 |
Pages |
2844-2846 |
|
|
Keywords |
Nb superconducting switch |
|
|
Abstract |
The transition from superconductive to resistive state caused by infrared radiation and bias current pulses was investigated in order to minimize switching time tau and driving power W. Experimental results for Nb microstrips confirm the correctness of calculations based on the model of electron heating. For Nb switches, tau measured directly is 0.3-0.8 ns for radiation pulses and 1-3 ns for bias current pulses at T=4.2 K, while for YBaCuO switches at T=77 K it is expected to be several picoseconds. For an YBaCuO sample with the dimensions of 5*2*0.15 mu m/sup 2/, W was 10 mW, and it can be further reduced to the order of several microwatts by decreasing the volume of the sample. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
1941-0069 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved ![sorted by Approved field, ascending order (up)](img/sort_asc.gif) |
no |
|
|
Call Number |
|
Serial |
1680 |
|
Permanent link to this record |
|
|
|
|
Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Potapov, V. D.; Sergeev, A. V. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Restriction of microwave enhancement of superconductivity in impure superconductors due to electron-electron interaction |
Type |
Journal Article |
|
Year |
1991 |
Publication |
Phys. B Condens. Mat. |
Abbreviated Journal |
Phys. B Condens. Mat. |
|
|
Volume |
169 |
Issue |
1-4 |
Pages |
629-630 |
|
|
Keywords |
impure superconductors |
|
|
Abstract |
Transition from microwave enhancement of supercurrent to superconductivity suppression is investigated in impure superconductors. It is demonstrated that frequency range of enhancement effect narrows with the decrease of electron mean free path, ℓ, and at ℓ⩽1nm electron heating is observed in the whole frequency range. Dependences of frequency boundaries on ℓ are explained by taking into account strong electron-electron interaction in impure metals. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
|
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0921-4526 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved ![sorted by Approved field, ascending order (up)](img/sort_asc.gif) |
no |
|
|
Call Number |
|
Serial |
1682 |
|
Permanent link to this record |