|
Records |
Links |
|
Author |
Lindgren, M.; Currie, M.; Zeng, W.-S.; Sobolewski, R.; Cherednichenko, S.; Voronov, B.; Gol'tsman, G. N. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Picosecond response of a superconducting hot-electron NbN photodetector |
Type |
Journal Article |
|
Year |
1998 |
Publication |
Appl. Supercond. |
Abbreviated Journal |
Appl. Supercond. |
|
|
Volume |
6 |
Issue |
7-9 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
423-428 |
|
|
Keywords |
NbN SSPD, SNSPD |
|
|
Abstract |
The ps optical response of ultrathin NbN photodetectors has been studied by electro-optic sampling. The detectors were fabricated by patterning ultrathin (3.5 nm thick) NbN films deposited on sapphire by reactive magnetron sputtering into either a 5×10 μm2 microbridge or 25 1 μm wide, 5 μm long strips connected in parallel. Both structures were placed at the center of a 4 mm long coplanar waveguide covered with Ti/Au. The photoresponse was studied at temperatures ranging from 2.15 K to 10 K, with the samples biased in the resistive (switched) state and illuminated with 100 fs wide laser pulses at 395 nm wavelength. At T=2.15 K, we obtained an approximately 100 ps wide transient, which corresponds to a NbN detector response time of 45 ps. The photoresponse can be attributed to the nonequilibrium electron heating effect, where the incident radiation increases the temperature of the electron subsystem, while the phonons act as the heat sink. The high-speed response of NbN devices makes them an excellent choice for an optoelectronic interface for superconducting digital circuits, as well as mixers for the terahertz regime. The multiple-strip detector showed a linear dependence on input optical power and a responsivity =3.9 V/W. |
|
|
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 |
0964-1807 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1584 |
|
Permanent link to this record |
|
|
|
|
Author |
Lobanov, Y. V.; Tong, Cheuk-Yu E.; Hedden, A. S.; Blundell, R.; Gol'tsman, G. N. |
|
|
Title |
Microwave-assisted슠measurement슠of the슠frequency슠response슠of슠terahertz슠HEB슠mixers슠with a슠fourier슠transform슠spectrometer |
Type |
Conference Article |
|
Year |
2010 |
Publication |
21st International Symposium on Space Terahertz Technology |
Abbreviated Journal |
21st ISSTT |
|
|
Volume |
|
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
420-423 |
|
|
Keywords |
HEB mixer |
|
|
Abstract |
We describe a novel method of operation of the HEB direct detector for use with a Fourier Transform Spectrometer. Instead of elevating the bath temperature, we have measured the RF response of waveguide HEB mixers by applying microwave radiation to select appropriate bias conditions. In our experiment, a microwave signal is injected into the HEB mixer via its IF port. By choosing an appropriate injection level, the device can be operated close to the desired operating point. Furthermore, we have shown that both thermal biasing and microwave injection can reproduce the same spectral response of the HEB mixer. However, with the use of microwave injection, there is no need to wait for the mixer to reach thermal equilibrium, so characterisation can be done in less time. Also, the liquid helium consumption for our wet cryostat is also reduced. We have demonstrated that the signalto-noise ratio of the FTS measurements can be improved with microwave injection. |
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
RPLAB @ gujma @ |
Serial |
725 |
|
Permanent link to this record |
|
|
|
|
Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Elantiev, A. I.; Karasik, B. S.; Potoskuev, S. E. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Intense electromagnetic radiation heating of electrons of a superconductor in the resistive state |
Type |
Journal Article |
|
Year |
1988 |
Publication |
Sov. J. Low Temp. Phys. |
Abbreviated Journal |
Sov. J. Low Temp. Phys. |
|
|
Volume |
14 |
Issue |
7 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
414-420 |
|
|
Keywords |
HEB |
|
|
Abstract |
|
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
Duplicated as 1697 |
Approved |
no |
|
|
Call Number |
|
Serial |
236 |
|
Permanent link to this record |
|
|
|
|
Author |
Boyarskii, D. A.; Gershenzon, V. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Tikhonov, V. V.; Chulkova, G. M. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
On the possibility of determining the microstructural parameters of an oil-bearing layer from radiophysical measurement data |
Type |
Journal Article |
|
Year |
1996 |
Publication |
J. of Communications Technology and Electronics |
Abbreviated Journal |
J. of Communications Technology and Electronics |
|
|
Volume |
41 |
Issue |
5 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
408-414 |
|
|
Keywords |
submillimeter waves, transmission |
|
|
Abstract |
A method for the reconstruction of microstructural properties of an oil-bearing rock from the spectral dependence of the transmission factor of submillimeter waves is proposed. |
|
|
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 |
1064-2269 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
Радиотехника и электроника 41, no. 4 (1996): 441-447 |
Approved |
no |
|
|
Call Number |
|
Serial |
1611 |
|
Permanent link to this record |
|
|
|
|
Author |
Kroug, M.; Yagoubov, P.; Gol'tsman, G.; Kollberg, E. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
NbN quasioptical phonon cooled hot electron bolometric mixers at THz frequencies |
Type |
Conference Article |
|
Year |
1997 |
Publication |
Inst. Phys. Conf. Ser. |
Abbreviated Journal |
Inst. Phys. Conf. Ser. |
|
|
Volume |
1 |
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
405-408 |
|
|
Keywords |
NbN HEB mixers |
|
|
Abstract |
|
|
|
Address |
Veldhoven |
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
Bristol |
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
0951-3248 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
3rd Eur. Conf. on Applied Superconductivity |
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1600 |
|
Permanent link to this record |
|
|
|
|
Author |
Smirnov, K. V.; Vachtomin, Yu. B.; Antipov, S. V.; Maslennikov, S. N.; Kaurova, N. S.; Drakinsky, V. N.; Voronov, B. M.; Gol'tsman, G. N.; Semenov, A. D.; Richter, H.; Hubers, H.-W. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Noise and gain performance of spiral antenna coupled HEB mixers at 0.7 THz and 2.5 THz |
Type |
Conference Article |
|
Year |
2003 |
Publication |
Proc. 14th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 14th Int. Symp. Space Terahertz Technol. |
|
|
Volume |
|
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
405-412 |
|
|
Keywords |
NbN HEB mixers |
|
|
Abstract |
Noise and gain performance of hot electron bolometer (HEB) mixers based on ultrathin superconducting NbN films integrated with a spiral antenna was studied. The noise temperature measurements for two samples with different active area of 3 p.m x 0.24 .tni and 1.3 1..tm x 0.12 1.tm were performed at frequencies 0.7 THz and 2.5 THz. The best receiver noise temperatures 370 K and 1600 K, respectively, have been found at these frequencies. The influence of contact resistance between the superconductor and the antenna terminals on the noise temperature of HEB is discussed. The noise and gain bandwidth of 5GHz and 4.2 GHz, respectively, are demonstrated for similar HEB mixer at 0.75 THz. |
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1502 |
|
Permanent link to this record |
|
|
|
|
Author |
Hajenius, M.; Yang, Z. Q.; Gao, J. R.; Baselmans, J. J. A.; Klapwijk, T. M.; Voronov, B.; Gol'tsman, G. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Optimized sensitivity of NbN hot electron bolometer mixers by annealing |
Type |
Journal Article |
|
Year |
2007 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
|
|
Volume |
17 |
Issue |
2 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
399-402 |
|
|
Keywords |
NbN HEB mixers |
|
|
Abstract |
We report that the heterodyne sensitivity of superconducting hot-electron bolometers (HEBs) increases by 25-30% after annealing at 85degC in high vacuum. The devices studied are twin-slot antenna coupled mixers with a small area NbN bridge of 1 mum times 0.15 mum, above which there is a SiO 2 passivation layer. The mixer noise temperature, gain, and resistance versus temperature curve of a HEB before and after annealing are compared and analysed. We show that the annealing reduces the intrinsic noise of the mixer by 37% and makes the superconducting transition of the bridge and the contacts sharper. We argue that the reduction ofthe noise is mainly due to the improvement of the transparency of the contact/film interface. The lowest receiver noise temperature of 700 K is measured at a local oscillator frequency of 1.63 THz and at a bath temperature of 4.2 K. |
|
|
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 |
1051-8223 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1426 |
|
Permanent link to this record |
|
|
|
|
Author |
Jiang, L.; Antipov, S. V.; Voronov, B. M.; Gol'tsman, G. N.; Zhang, W.; Li, N.; Lin, Z. H.; Yao, Q. J.; Miao, W.; Shi, S. C.; Svechnikov, S. I.; Vakhtomin, Y. B. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Characterization of the performance of a quasi-optical NbN superconducting HEB mixer |
Type |
Journal Article |
|
Year |
2007 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
|
|
Volume |
17 |
Issue |
2 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
395-398 |
|
|
Keywords |
NbN HEB mixers, noise temperature |
|
|
Abstract |
In this paper we focus mainly on the investigation of the performance of a quasi-optical (planar log-spiral antenna) phonon-cooled NbN superconducting hot electron bolometer (HEB) mixer, which is cryogenically cooled by a close-cycled 4-K cryocooler, at 500 and 850 GHz frequency bands. The mixer's noise performance, stability of IF output power, and local oscillator (LO) power requirement are characterized for three NbN superconducting HEB devices of different sizes. The transmission characteristics of Mylar and Zitex films with incidence waves of an elliptical polarization are also examined by measuring the mixer's noise temperature. The lowest receiver noise temperatures (with no corrections) of 750 and 1100 K are measured at 500 and 850 GHz, respectively. Experimental results also demonstrate that the bigger the HEB device is, the higher the stability of IF output power becomes. |
|
|
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 |
1051-8223 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1429 |
|
Permanent link to this record |
|
|
|
|
Author |
Finkel, M. I.; Maslennikov, S. N.; Vachtomin, Yu. B.; Svechnikov, S. I.; Smirnov, K. V.; Seleznev, V. A.; Korotetskaya, Yu. P.; Kaurova, N. S.; Voronov, B. M.; Gol'tsman, G. N. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Hot electron bolometer mixer for 20 – 40 THz frequency range |
Type |
Conference Article |
|
Year |
2005 |
Publication |
Proc. 16th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 16th Int. Symp. Space Terahertz Technol. |
|
|
Volume |
|
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
393-397 |
|
|
Keywords |
IR NbN HEB mixers |
|
|
Abstract |
The developed HEB mixer was based on a 5 nm thick NbN film deposited on a GaAs substrate. The active area of the film was patterned as a 30×20 μm 2 strip and coupled with a 50 Ohm coplanar line deposited in situ. An extended hemispherical germanium lens was used to focus the LO radiation on the mixer. The responsivity of the mixer was measured in a direct detection mode in the 25÷64 THz frequency range. The noise performance of the mixer and the directivity of the receiver were investigated in a heterodyne mode. A 10.6 μm wavelength CW CO 2 laser was utilized as a local oscillator. |
|
|
Address |
|
|
|
Corporate Author |
|
Thesis |
|
|
|
Publisher |
|
Place of Publication |
Göteborg, Sweden |
Editor |
|
|
|
Language |
|
Summary Language |
|
Original Title |
|
|
|
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
|
|
Series Volume |
|
Series Issue |
|
Edition |
|
|
|
ISSN |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
369 |
|
Permanent link to this record |
|
|
|
|
Author |
Ryabchun, S.; Tong, C.-Y. E.; Blundell, R.; Kimberk, R.; Gol'tsman, G. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Study of the effect of microwave radiation on the operation of HEB mixers in the terahertz frequency range |
Type |
Journal Article |
|
Year |
2007 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
|
|
Volume |
17 |
Issue |
2 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
391-394 |
|
|
Keywords |
NbN HEB mixers |
|
|
Abstract |
We have investigated the effect of injecting microwave radiation, with a frequency much lower than that corresponding to the energy gap of the superconductor, on the performance of the hot-electron bolometer mixer incorporated into a THz heterodyne receiver. More specifically, we show that exposing the mixer to microwave radiation does not cause a significant rise of the receiver noise temperature and fall of the mixer conversion gain so long as the microwave power is a small fraction of local oscillator power. The injection of a small, but controlled amount of microwave power therefore enables active compensation of local oscillator power and coupling fluctuations which can significantly degrade the gain stability of hot electron bolometer mixer receivers. |
|
|
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 |
1051-8223 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1427 |
|
Permanent link to this record |
|
|
|
|
Author |
Il'in, K. S.; Gol'tsman, G. N.; Voronov, B. M.; Sobolewski, Roman |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Characterization of the electron energy relaxation process in NbN hot-electron devices |
Type |
Conference Article |
|
Year |
1999 |
Publication |
Proc. 10th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 10th Int. Symp. Space Terahertz Technol. |
|
|
Volume |
|
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
390-397 |
|
|
Keywords |
HEB mixers, SSPD, SNSPD, NbN films, Nb films |
|
|
Abstract |
We report on transient measurements of electron energy relaxation in NbN films with 300-fs time resolution. Using an electro-optic sampling technique, we have studied the photoresponse of 3.5-nm-thick NbN films deposited on sapphire substrates and exposed to 100-fs-wide optical pulses. Our experimental data analysis was based on the two-temperature model and has shown that in our films at the superconducting transition 10.5 K the inelastic electron-phonon scattering time was about (111}+-__.2) ps. This response time indicated that the maximum intermediate-frequency band of a NbN hot-electron phonon-cooled mixer should reach (16+41-3) GHz if one eliminates the bolometric phonon-heating effect. We have suggested several ways to increase the effectiveness of phonon cooling to achieve the above intrinsic value of the NbN mixer bandwidth. |
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1576 |
|
Permanent link to this record |
|
|
|
|
Author |
Loudkov, D.; Khosropanah, P.; Cherednichenko, S.; Adam, A.; MerkeI, H.; Kollberg, E.; Gol'tsman, G. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Broadband fourier transform spectrometer (FTS) measurements of spiral and double-slot planar antennas at THz frequencies |
Type |
Conference Article |
|
Year |
2002 |
Publication |
Proc. 13th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 13th Int. Symp. Space Terahertz Technol. |
|
|
Volume |
|
Issue |
|
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
373-369 |
|
|
Keywords |
NbN HEB mixers |
|
|
Abstract |
The direct responses of NbN phonon-cooled hot electron bolometer (HEB) mixers, integrated with different planar antennas, are measured, using Fourier Transform Spectrometer (F1S). One spiral antenna and several double slot antennas, designed for 0.6, 1.4, 1.6, 1.8 and 2.5 THz central frequencies, are investigated. The Optimization of the measurement set-up is discussed in terms of the beam splitter and the F11S-to-HEB coupling. The result shows that the spiral antenna is circular polarized and has a bandwidth of about 2 THz. The frequency bands of double slot antennas show some shift from the design values and their relative bandwidth increases by increasing the design frequency. The antenna responses do not depend on the HEB bias point and temperature, as long as the device is in the resistive state. |
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1530 |
|
Permanent link to this record |
|
|
|
|
Author |
Lang, P. T.; Knott, W. J.; Leipold, I.; Renk, K. F.; Semenov, A. D.; Gol'tsman, G. N. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
Generation and detection of tunable ultrashort infrared and far-infrared radiation pulses of high intensity |
Type |
Journal Article |
|
Year |
1992 |
Publication |
Int. J. of Infrared and Millimeter Waves |
Abbreviated Journal |
Int. J. of Infrared and Millimeter Waves |
|
|
Volume |
13 |
Issue |
3 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
373-380 |
|
|
Keywords |
CO2 IR lasers, FIR |
|
|
Abstract |
We report on generation and detection of intense pulsed radiation with frequency tunability in the infrared and far-infrared spectral regions. Infrared radiation is generated with a transversally electrically excited high pressure CO2 laser. A laser pulse of a total duration of about 300 ns consisted, due to self mode locking, of a series of single pulses, some with pulse durations of less than 450 ps and peak powers larger than 20 MW. Using these pulses for optical with durations less than 400 ps were obtained. For detection a new ultrafast superconducting detector was used. |
|
|
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 |
0195-9271 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1671 |
|
Permanent link to this record |
|
|
|
|
Author |
Gershenzon, E. M.; Gol'tsman, G. N.; Multanovskii, V. V.; Ptitsina, N. G. |
![find record details (via OpenURL) openurl](img/xref.gif)
|
|
Title |
Kinetics of electron and hole binding into excitons in germanium |
Type |
Journal Article |
|
Year |
1983 |
Publication |
Sov. Phys. JETP |
Abbreviated Journal |
Sov. Phys. JETP |
|
|
Volume |
57 |
Issue |
2 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
369-376 |
|
|
Keywords |
Ge, electron and hole binding |
|
|
Abstract |
The kinetics of binding of free carriers'into excitons under stationary and nonstationary conditions is studied by investigating the submillimeter photoconductivity of Ge in a wide range of temperatures and of excitation levels. It is shown that the absolute values and the temperature dependence of the binding cross section (o- T-'.' ) can be satisfactorily described by the cascade recombination theory. The value of o and its temperature dependence differ significantly from the cross sections, measured in the same manner, for capture by attracting small impurities. Under nonstationary conditions, just as in the case of recombination with shallow impurities, a signifi- cant role is played by the sticking of the carriers in highly excited states. |
|
|
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 |
|
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1711 |
|
Permanent link to this record |
|
|
|
|
Author |
Tong, C. E.; Blundell, R.; Papa, D. C.; Smith, M.; Kawamura, J.; Gol'tsman, G.; Gershenzon, E.; Voronov, B. |
![goto web page (via DOI) doi](img/doi.gif)
|
|
Title |
An all solid-state superconducting heterodyne receiver at terahertz frequencies |
Type |
Journal Article |
|
Year |
1999 |
Publication |
IEEE Microw. Guid. Wave Lett. |
Abbreviated Journal |
IEEE Microw. Guid. Wave Lett. |
|
|
Volume |
9 |
Issue |
9 |
Pages ![sorted by First Page field, descending order (down)](img/sort_desc.gif) |
366-368 |
|
|
Keywords |
waveguide NbN HEB mixers |
|
|
Abstract |
A superconducting hot-electron bolometer mixer-receiver operating from 1 to 1.26 THz has been developed. This heterodyne receiver employs two solid-state local oscillators each consisting of a Gunn oscillator followed by two stages of varactor frequency multiplication. The measured receiver noise temperature is 1350 K at 1.035 THz and 2700 K at 1.26 THz. This receiver demonstrates that tunable solid-state local oscillators, supplying only a few micro-watts of output power, can be used in terahertz receiver applications. |
|
|
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 |
1051-8207 |
ISBN |
|
Medium |
|
|
|
Area |
|
Expedition |
|
Conference |
|
|
|
Notes |
|
Approved |
no |
|
|
Call Number |
|
Serial |
1565 |
|
Permanent link to this record |