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Author |
Gershenson, M. E.; Gong, D.; Sato, T.; Karasik, B. S.; Sergeev, A. V. |
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Title |
Millisecond electron-phonon relaxation in ultrathin disordered metal films at millikelvin temperatures |
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Journal Article |
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Year |
2001 |
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Appl. Phys. Lett. |
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Volume |
79 |
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2049-2051 |
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HEB detector, FIR, far infrared |
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RPLAB @ s @ heb_eph_interaction_Gershenzon |
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315 |
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Ferrari, S.; Kovalyuk, V.; Hartmann, W.; Vetter, A.; Kahl, O.; Lee, C.; Korneev, A.; Rockstuhl, C.; Gol'tsman, G.; Pernice, W. |
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Title |
Hot-spot relaxation time current dependence in niobium nitride waveguide-integrated superconducting nanowire single-photon detectors |
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Journal Article |
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Year |
2017 |
Publication |
Opt. Express |
Abbreviated Journal |
Opt. Express |
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Volume |
25 |
Issue |
8 |
Pages |
8739-8750 |
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Keywords |
SSPD, SNSPD, photon counting; Infrared; Quantum detectors; Integrated optics; Multiphoton processes; Photon statistics |
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Abstract |
We investigate how the bias current affects the hot-spot relaxation dynamics in niobium nitride. We use for this purpose a near-infrared pump-probe technique on a waveguide-integrated superconducting nanowire single-photon detector driven in the two-photon regime. We observe a strong increase in the picosecond relaxation time for higher bias currents. A minimum relaxation time of (22 +/- 1)ps is obtained when applying a bias current of 50% of the switching current at 1.7 K bath temperature. We also propose a practical approach to accurately estimate the photon detection regimes based on the reconstruction of the measured detector tomography at different bias currents and for different illumination conditions. |
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RPLAB @ kovalyuk @ |
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1118 |
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Käufl, H. U.; Rothermal, H.; Drapatz, S. |
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Title |
Investigation of the Martian atmosphere by 10 micron heterodyne spectroscopy |
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Journal Article |
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Year |
1984 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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136 |
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Pages |
319-325 |
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Keywords |
astronomical spectroscopy, atmospheric composition, infrared astronomy, mars atmosphere, spectral line width, carbon dioxide concentration, nonequilibrium thermodynamics, optical heterodyning, planetary radiation, mars, atmosphere, spectroscopy, atmosphere, carbon dioxide, altitude, kinetics, rotation, thermal properties, temperature, emissions, intensity, models, data, spectra |
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449 |
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Rothermel, H.; Käufl, H. U.; Schrey, U.; Drapatz, S. |
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Title |
Thermal structure of the Martian mesosphere |
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Journal Article |
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Year |
1988 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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Volume |
196 |
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296-300 |
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atmospheric temperature, carbon dioxide, infrared spectroscopy, mars atmosphere, mesosphere, emission spectra, line spectra, spatial resolution, mars, atmosphere, mesosphere, structure, thermal properties, spectra, spectroscopy, earth-based observations, temperature, patterns, infrared, polar regions, wavelengths, equipment, procedure, carbon dioxide, emissions |
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Rothermel1988 |
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450 |
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Johnson, M. A.; Betz, A. L.; McLaren, R. A.; Townes, C. H.; Sutton, E. C. |
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Title |
Nonthermal 10 micron CO2 emission lines in the atmospheres of Mars and Venus |
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Journal Article |
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Year |
1976 |
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Astron. Astrophys. |
Abbreviated Journal |
A&A |
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208 |
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145 |
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Keywords |
carbon dioxide, emission spectra, infrared spectra, mars atmosphere, nonthermal radiation, optical heterodyning, planetary radiation, venus atmosphere, absorption spectra, energy transfer, line spectra, molecular absorption, molecular collisions, near infrared radiation, solar flux |
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ref1976ApJ...208L.145J |
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451 |
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Author |
Rothermel, H.; Käufl, H. U.; Yu, Y. |
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Title |
A heterodyne spectrometer for astronomical measurements at 10 micrometers |
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Journal Article |
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Year |
1983 |
Publication |
Astron. Astrophys. |
Abbreviated Journal |
A&A |
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126 |
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387-392 |
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astronomical spectroscopy, infrared astronomy, infrared spectrometers, optical heterodyning, infrared telescopes, laser spectrometers, mars (planet), venus (planet) |
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453 |
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Author |
Betz, A. L.; Johnson, M. A.; McLaren, R. A.; Sutton, E. C. |
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Title |
Heterodyne detection of CO2 emission lines and wind velocities in the atmosphere of Venus |
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Journal Article |
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Year |
1976 |
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Astrophys. J. |
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208 |
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L141-L144 |
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carbon dioxide, emission spectra, optical heterodyning, planetary radiation, venus atmosphere, wind velocity, doppler effect, infrared radiation, ultraviolet radiation, venus clouds |
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455 |
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Author |
Масленников, Сергей Николаевич |
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Title |
Смесители на эффекте электронного разогрева для терагерцового и инфракрасного диапазонов |
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Manuscript |
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2007 |
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М. МПГУ |
Abbreviated Journal |
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HEB, detector, mixer, terahertz, THz, infrared, IR, direct detection effect, conversion loss |
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Ph.D. thesis |
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Russian |
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481 |
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Author |
Soifer, B. T.; Pipher, J. L. |
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Title |
Instrumentation for infrared astronomy |
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Journal Article |
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1978 |
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Annual Rev. Astron. Astrophys. |
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16 |
Issue |
1 |
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335-369 |
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Keywords |
infrared applications |
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0066-4146 |
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492 |
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Thiébeau, C.; Courtois, D.; Delahaigue, A.; Corre, H.; Mouanda, J. C.; Fayt, A. |
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Dual-beam laser heterodyne spectrometer: Ethylene absorption spectrum in the 10 μm range |
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Journal Article |
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1988 |
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Applied Physics B: Photophysics and Laser Chemistry |
Abbreviated Journal |
Appl. Phys. B |
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Volume |
47 |
Issue |
4 |
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313-318 |
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infrared applications |
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0721-7269 |
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493 |
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Parrott, Edward P. J.; Zeitler, J. Axel; Fris<cc><152>c<cc><152>ic<cc><81>, Tomislav; Pepper, Michael; Jones, William; Day, Graeme M.; Gladden, Lynn F. |
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Testing the sensitivity of terahertz spectroscopy to changes in molecular and supramolecular structure: a study of structurally similar cocrystals |
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Journal Article |
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2009 |
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Crystal Growth & Design |
Abbreviated Journal |
Crystal Growth & Design |
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9 |
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3 |
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1452-1460 |
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supramolecular recognition, infrared, terahertz, IR, THz, TDS |
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Terahertz time-domain-spectroscopy (THz-TDS) has emerged as a versatile spectroscopic technique, and an alternative to powder X-ray diffraction in the characterization of molecular crystals. We tested the ability of terahertz spectroscopy to distinguish between chiral and racemic hydrogen-bonded cocrystals that are similar in molecular and supramolecular structure. Terahertz spectroscopy readily distinguished between the isostructural cocrystals of theophylline with chiral and racemic forms of malic acid which are almost identical in molecular structure and supramolecular architecture. Similarly, the cocrystals of theophylline with chiral and racemic forms of tartaric acid, which are similar at the molecular level but dissimilar in crystal packing, were distinguished unequivocally. The investigation of the same cocrystals using X-ray powder diffraction and Raman spectroscopy suggested that THz-TDS is comparable in sensitivity to diffraction methods and more sensitive than Raman spectroscopy to changes in cocrystal architecture. The differences in spectra acquired by THz-TDS could be further enhanced by cooling the samples to 109 K. |
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1528-7483 |
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567 |
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Финкель, М. И. |
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Терагерцовые смесители на эффекте электронного разогрева в ультратонких плёнках NbN и NbTiN |
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Manuscript |
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2006 |
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М. МПГУ |
Abbreviated Journal |
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Keywords |
HEB, detector, mixer, terahertz, THz, infrared, IR, direct detection effect, conversion bandwidth, conversion loss |
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Ph.D. thesis |
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597 |
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Doi, Y.; Wang, Z.; Ueda, T.; Nickels, P.; Komiyama, S.; Patrashin, M.; Hosako, I.; Matsuura, S.; Shirahata, M.; Sawayama, Y.; Kawada, M. |
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Title |
CSIP – a novel photon-counting detector applicable for the SPICA far-infrared instrument |
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Journal Article |
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2009 |
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SPICA |
Abbreviated Journal |
SPICA |
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SPICA Workshop 2009 |
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Keywords |
detectors; Infrared |
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We describe a novel GaAs/AlGaAs double-quantumwell device for the infrared photon detection, called ChargeSensitive Infrared Phototransistor (CSIP). The principle of CSIP detector is the photo-excitation of an intersubband transition in a QW as an charge integrating gate and the signal ampli<ef><ac><81>cation by another QW as a channel with very high gain, which provides us with extremely high responsivity (104 – 106 A/W). It has been demonstrated that the CSIP designed for the mid-infrared wavelength (14.7 μm) has an excellent sensitivity; the noise equivalent power (NEP) of 7 × 10-19 W/ with the quantum effciency of ~ 2%. Advantages of the CSIP against the other highly sensitive detectors are, huge dynamic range of > 106, low output impedance of 103 – 104 Ohms, and relatively high operation temperature (> 2 K). We discuss possible applications of the CSIP to FIR photon detection covering 35 – 60 μm waveband, which is a gap uncovered with presently available photoconductors. |
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RPLAB @ gujma @ |
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672 |
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Author |
Mitin, Vladimir; Antipov, Andrei; Sergeev, Andrei; Vagidov, Nizami; Eason, David; Strasser, Gottfried |
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Title |
Quantum Dot Infrared Photodetectors: Photoresponse Enhancement Due to Potential Barriers |
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Journal Article |
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2011 |
Publication |
Nanoscale Research Letters |
Abbreviated Journal |
Nanoscale res lett |
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6 |
Issue |
1 |
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6 |
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Quantum dots; Infrared detectors; Photoresponse; Doping; Potential barriers; Capture processes |
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Potential barriers around quantum dots (QDs) play a key role in kinetics of photoelectrons. These barriers are always created, when electrons from dopants outside QDs fill the dots. Potential barriers suppress the capture processes of photoelectrons and increase the photoresponse. To directly investigate the effect of potential barriers on photoelectron kinetics, we fabricated several QD structures with different positions of dopants and various levels of doping. The potential barriers as a function of doping and dopant positions have been determined using nextnano3 software. We experimentally investigated the photoresponse to IR radiation as a function of the radiation frequency and voltage bias. We also measured the dark current in these QD structures. Our investigations show that the photoresponse increases ~30 times as the height of potential barriers changes from 30 to 130 meV. |
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RPLAB @ gujma @ |
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712 |
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Author |
González, F. J.; Boreman, G. D. |
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Comparison of dipole, bowtie, spiral and log-periodic IR antennas |
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2005 |
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Infrared Physics & Technology |
Abbreviated Journal |
Inf Phys & Technol |
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46 |
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5 |
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418-428 |
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optical antennas; Microbolometer; Infrared antennas; Antenna efficiency; Antenna-coupled detectors |
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Antenna-coupled microbolometers use planar lithographic antennas to couple infrared radiation into a bolometer with sub-micron dimensions. In this paper four different types of infrared antennas were fabricated on thin grounded-substrates and coupled to microbolometers. Dipole, bowtie, spiral and log-periodic IR antenna-coupled detectors were measured at 10.6 μm and their performance compared. A new method to calculate the radiation efficiency based on the spatial and angular response of infrared antennas is presented and used to evaluate their performance. The calculated radiation efficiency for the dipole, bowtie, spiral and log-periodic IR antennas was 20%, 37%, 25% and 46% respectively. A dipole-length study was performed and shows that the quasistatic value of the effective permittivity accurately describes the incident wavelength in the substrate at infrared frequencies for antennas on a thin substrate. |
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Series Volume |
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Series Issue |
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Edition |
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Conference |
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Approved |
no |
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Call Number |
RPLAB @ gujma @ |
Serial |
739 |
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