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| Author | Smirnov, K. V.; Ptitsina, N. G.; Vakhtomin, Y. B.; Verevkin, A. A.; Gol’tsman, G. N.; Gershenzon, E. M. | ||||
| Title | Energy relaxation of two-dimensional electrons in the quantum Hall effect regime | Type | Journal Article | ||
| Year | 2000 | Publication | JETP Lett. | Abbreviated Journal | JETP Lett. |
| Volume | 71 | Issue | 1 | Pages | 31-34 |
| Keywords | 2DEG, GaAs/AlGaAs heterostructures | ||||
Abstract  |
The mm-wave spectroscopy with high temporal resolution is used to measure the energy relaxation times τe of 2D electrons in GaAs/AlGaAs heterostructures in magnetic fields B=0–4 T under quasi-equilibrium conditions at T=4.2 K. With increasing B, a considerable increase in τe from 0.9 to 25 ns is observed. For high B and low values of the filling factor ν, the energy relaxation rate τ −1e oscillates. The depth of these oscillations and the positions of maxima depend on the filling factor ν. For ν>5, the relaxation rate τ −1e is maximum when the Fermi level lies in the region of the localized states between the Landau levels. For lower values of ν, the relaxation rate is maximum at half-integer values of τ −1e when the Fermi level is coincident with the Landau level. The characteristic features of the dependence τ −1e (B) are explained by different contributions of the intralevel and interlevel electron-phonon transitions to the process of the energy relaxation of 2D electrons. | ||||
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| ISSN | 0021-3640 | ISBN | Medium | ||
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| Notes | http://jetpletters.ru/ps/899/article_13838.shtml (“Энергетическая релаксация двумерных электронов в области квантового эффекта Холла”) | Approved | no | ||
| Call Number | Serial | 1559 | |||
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| Author | Gol’tsman, G. N. | ||||
| Title | The “Millimetron” project, a future space telescope mission | Type | Abstract | ||
| Year | 2007 | Publication | Proc. 18th Int. Symp. Space Terahertz Technol. | Abbreviated Journal | Proc. 18th Int. Symp. Space Terahertz Technol. |
| Volume | Issue | Pages | 255 | ||
| Keywords | Millimetron space observatory, VLBI | ||||
| Abstract |
The goal of the Millimetron project is to develop a space observatory operating in the millimeter, sub-millimeter and infrared wavelength ranges using a 12-m actively cooled telescope in a single-dish mode and as an interferometer with the space-ground and space-space baselines (the later after the launch of the second identical space telescope). The Millimetron’s main reflector and other optics will be cooled down to 4K thus enabling astronomical observations with super high sensitivity in MM and subMM (down to nanoJansky level). Heterodyne observations in an interferometer mode at frequencies 0.1-1 THz will provide super high angular resolution. The main instruments, planned to be installed are wide-range imaging arrays, radiometers with spectrometers and polarimeters, VLBI heterodyne receivers, and Mikelson type interferometer devices. Wide-range MM and subMM imaging arrays and spectrometers will be based on a superconducting hot electron direct detectors with Andreev mirrors operating at 0.1 K. Such detectors are the best candidates to reach the noise equivalent power level of 10 -19 -10 -20 W/√Hz. Heterodyne receivers will be both SIS based superconducting integrated receiver with flux-flow oscillator as LO (0.1-0.9 THz range) and HEB based receivers using multiplied Gunn oscillator as LO for 1-2 THz range and quantum cascade lasers as LO for 2-5 THz range. For observations in middle IR region there will be installed large arrays of superconducting single photon detectors, providing imaging with very high dynamic range and ultimate sensitivity. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1422 | |||
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| Author | Ozhegov, R. V.; Gorshkov, K. N.; Smirnov, K. V.; Gol’tsman, G. N.; Filippenko, L. V.; Koshelets, V. P. | ||||
| Title | Terahertz imaging system based on superconducting integrated receiver | Type | Conference Article | ||
| Year | 2010 | Publication | Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications | Abbreviated Journal | Proc. 2-nd Int. Conf. Terahertz and Microwave radiation: Generation, Detection and Applications |
| Volume | Issue | Pages | 20-22 | ||
| Keywords | SIS mixer, SIR | ||||
| Abstract |
The development of terahertz imaging instruments for security systems is on the cutting edge of terahertz technology. We are developing a THz imaging system based on a superconducting integrated receiver (SIR). An SIR is a new type of heterodyne receiver based on an SIS mixer integrated with a flux-flow oscillator (FFO) and a harmonic mixer which is used for phase-locking the FFO. Developing an array of SIRs would allow obtaining amplitude and phase characteristics of incident radiation in the plane of the receiver. Employing an SIR in an imaging system means building an entirely new instrument with many advantages compare to traditional systems: i) high temperature resolution, comparable to the best results for incoherent receivers; ii) high spectral resolution allowing spectral analysis of various substances; iii) the local oscillator frequency can be varied to obtain images at different frequencies, effectively providing “color” images; iv) since a heterodyne receiver preserves the phase of the radiation, it is possible to construct 3D images. The paper presents a prototype THz imaging system using an 1 pixel SIR. We have studied the dependence of the noise equivalent temperature difference (NETD) on the integration time and also possible ways of achieving best possible sensitivity. An NETD of 13 mK was obtained with an integration time of 1 sec a detection bandwidth of 4 GHz at a local oscillator frequency of 520 GHz. An important advantage of an FFO is its wide operation range: 300-700 GHz. | ||||
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| Notes | Approved | no | |||
| Call Number | ozhegov2010terahertz | Serial | 1397 | ||
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| Author | Svechnikov, S. I.; Finkel, M. I.; Maslennikov, S. N.; Vachtomin, Y. B.; Smirnov, K. V.; Seleznev, V. A.; Korotetskaya, Y. P.; Kaurova, N. S.; Voronov, B. M.; Gol’tsman, G. N. | ||||
| Title | Superconducting hot electron bolometer mixer for middle IR range | Type | Conference Article | ||
| Year | 2006 | Publication | Proc. 16th Int. Crimean Microwave and Telecommunication Technology | Abbreviated Journal | Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
| Volume | 2 | Issue | Pages | 686-687 | |
| Keywords | IR NbN HEB mixer, detector, GaAs substrate | ||||
| Abstract |
The developed directly lens coupled hot electron bolometer (HEB) mixer was based on 5 nm superconducting NbN deposited on GaAs substrate. The layout of the structure, including 30x20 mcm^2 active area coupled with a 50 Ohm coplanar line, was patterned by photolithography. 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 mum wavelength CW CO2 laser was utilized as a local oscillator. | ||||
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| Notes | Approved | no | |||
| Call Number | 4023440 | Serial | 1297 | ||
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| Author | Ozhegov, R. V.; Okunev, O. V.; Gol’tsman, G. N.; Filippenko, L. V.; Koshelets, V. P. | ||||
| Title | Noise equivalent temperature difference of a superconducting integrated terahertz receiver | Type | Journal Article | ||
| Year | 2009 | Publication | J. Commun. Technol. Electron. | Abbreviated Journal | J. Commun. Technol. Electron. |
| Volume | 54 | Issue | 6 | Pages | 716-720 |
| Keywords | SIS mixer SIR NETD, FFO, harmonic mixer | ||||
| Abstract |
The dependence of the noise equivalent temperature difference (NETD) of a superconducting integrated receiver (SIR) on the receiver noise temperature and the inputsignal level has been investigated. An unprecedented NETD of 13±2 mK has been measured at a SIR noise temperature of 200 K, intermediate-frequency bandwidth of 4 GHz, and time constant of 1 s. With a decrease in the input signal, an improvement in the NETD is observed. This effect is explained by a reduction in the influence of the instabilities of the receiver power supply and the amplification circuit that occur when the input signal is decreased. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1064-2269 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1400 | |||
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| Author | Verevkin, A. A.; Ptitsina, N. G.; Smirnov, K. V.; Voronov, B. M.; Gol’tsman, G. N.; Gershenson, E. M.; Yngvesson, K. S. | ||||
| Title | Multiple Andreev reflection in hybrid AlGaAs/GaAs structures with superconducting NbN contacts | Type | Journal Article | ||
| Year | 1999 | Publication | Semicond. | Abbreviated Journal | Semicond. |
| Volume | 33 | Issue | 5 | Pages | 551-554 |
| Keywords | 2DEG, AlGaAs/GaAs heterostructures | ||||
| Abstract |
The conductivity of hybrid microstructures with superconducting contacts made of niobium nitride to a semiconductor with a two-dimensional electron gas in a AlGaAs/GaAs heterostructure has been investigated. Distinctive features of the behavior of the conductivity indicate the presence of multiple Andreev reflection at scattering centers in the normal region near the superconductor-semiconductor boundary. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1063-7826 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1571 | |||
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| Author | Shangina, E. L.; Smirnov, K. V.; Morozov, D. V.; Kovalyuk, V. V.; Gol’tsman, G. N.; Verevkin, A. A.; Toropov, A. I. | ||||
| Title | Concentration dependence of the intermediate frequency bandwidth of submillimeter heterodyne AlGaAs/GaAs nanostructures | Type | Journal Article | ||
| Year | 2010 | Publication | Bull. Russ. Acad. Sci. Phys. | Abbreviated Journal | Bull. Russ. Acad. Sci. Phys. |
| Volume | 74 | Issue | 1 | Pages | 100-102 |
| Keywords | 2DEG AlGaAs/GaAs heterostructures, THz heterodyne detectors, IF bandwidth | ||||
| Abstract |
The concentration dependence of the intermediate frequency bandwidth of heterodyne AlGaAs/GaAs detectors with 2D electron gas is measured using submillimeter spectroscopy with high time resolution at T= 4.2 K. The intermediate frequency bandwidth f3dBfalls from 245 to 145 MHz with increasing concentration of 2D electrons n s = (1.6-6.6) × 10[su11] cm-2. The dependence f3dB ≈ n s – 0.04±is observed in the studied concentration range; this dependence is determined by electron scattering by the deformation potential of acoustic phonons and piezoelectric scattering. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1062-8738 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1217 | |||
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| Author | Rasulova, G. K.; Brunkov, P. N.; Pentin, I. V.; Egorov, A. Y.; Knyazev, D. A.; Andrianov, A. V.; Zakhar’in, A. O.; Konnikov, S. G.; Gol’tsman, G. N. | ||||
| Title | A weakly coupled semiconductor superlattice as a potential for a radio frequency modulated terahertz light emitter | Type | Journal Article | ||
| Year | 2012 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume | 100 | Issue | 13 | Pages | 131104 (1 to 4) |
| Keywords | semiconductor superlattice | ||||
| Abstract |
The bolometer response to THz radiation from a weakly coupled GaAs/AlGaAs superlattice biased in the self-oscillations regime has been observed. The bolometer signal is modulated with the frequency equal to the fundamental frequency of superlattice self-oscillations. The frequency spectrum of the bolometer signal contains higher harmonics whose frequency is a multiple of fundamental frequency of self-oscillations. This work was supported by State Contracts Nos. 16.740.11.0044 and 16.552.11.7002 of Ministry of Education and Science of the Russian Federation. Structural characterization was made on the equipment of the Joint Research Centre «Material science and characterization in advanced technology» (Ioffe Institute, St. Petersburg, Russia). |
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| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Approved | no | |||
| Call Number | Serial | 1379 | |||
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| Author | Zinoni, C.; Alloing, B.; Li, L. H.; Marsili, F.; Fiore, A.; Lunghi, L.; Gerardino, A.; Vakhtomin, Y. B.; Smirnov, K. V.; Gol’tsman, G. N. | ||||
| Title | Single-photon experiments at telecommunication wavelengths using nanowire superconducting detectors | Type | Journal Article | ||
| Year | 2007 | Publication | Appl. Phys. Lett. | Abbreviated Journal | Appl. Phys. Lett. |
| Volume | 91 | Issue | 3 | Pages | 031106 (1 to 3) |
| Keywords | SSPD, SNSPD, APD | ||||
| Abstract |
The authors report fiber-coupled superconducting single-photon detectors with specifications that exceed those of avalanche photodiodes, operating at telecommunication wavelength, in sensitivity, temporal resolution, and repetition frequency. The improved performance is demonstrated by measuring the intensity correlation function g(2)(τ) of single-photon states at 1300nm produced by single semiconductor quantum dots. This work was supported by Swiss National Foundation through the “Professeur borsier” and NCCR Quantum Photonics program, FP6 STREP “SINPHONIA” (Contract No. NMP4-CT-2005-16433), IP “QAP” (Contract No. 15848), NOE “ePIXnet,” and the Italian MIUR-FIRB program. |
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| ISSN | 0003-6951 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Notes | Erratum: 1395 | Approved | no | ||
| Call Number | Serial | 1396 | |||
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| Author | Nebosis, R. S.; Heusinger, M. A.; Schatz, W.; Renk, K. F.; Gol’tsman, G. N.; Karasik, B. S.; Semenov, A. D.; Gershenzon, E. M. | ||||
| Title | Ultrafast photoresponse of a structured YBa2Cu3O7-δ thin film to ultrashort FIR laser pulses | Type | Journal Article | ||
| Year | 1993 | Publication | IEEE Trans. Appl. Supercond. | Abbreviated Journal | IEEE Trans. Appl. Supercond. |
| Volume | 3 | Issue | 1 | Pages | 2160-2162 |
| Keywords | YBCO HTS detectors | ||||
| Abstract |
The authors have investigated the photoinduced voltage response of a current-carrying structured YBa2Cu3O7-δ thin film to ultrashort far-infrared (FIR) laser pulses in the frequency range from 0.7 THz to 7 THz. The detector has shown an almost constant sensitivity of 1 mV/W and a noise equivalent power of less than 5*10/sup -7/ W/ square root Hz. The temperature dependence of the decay time of the detector signal was studied for temperatures around the transition temperature of the film ( approximately 80 K). For a detector temperature where dR/dT had its maximum, the authors observed bolometric signals with decay times of about 2 ns, and for lower temperatures they observed nonbolometric signals with decay times of approximately 120 ps; the duration of the nonbolometric signals was limited by the time resolution of the electronic registration equipment. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1658 | |||
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| Author | Xu, Y.; Zheng, X.; Williams, C.; Verevkin, A.; Sobolewski, R.; Chulkova, G.; Lipatov, A.; Okunev, O.; Smirnov, K.; Gol’tsman, G. N. | ||||
| Title | Ultrafast superconducting hot-electron single-photon detector | Type | Conference Article | ||
| Year | 2001 | Publication | CLEO | Abbreviated Journal | CLEO |
| Volume | Issue | Pages | 345 | ||
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract |
Summary form only given. The current most-pressing need is to develop a practical, GHz-range counting single-photon detector, operational at either 1.3-/spl mu/m or 1.55-/spl mu/m radiation wavelength, for novel quantum communication and quantum cryptography systems. The presented solution of the problem is to use an ultrafast hot-electron photodetector, based on superconducting thin-film microstructures. This type of device is very promising, due to the macroscopic quantum nature of superconductors. Very fast response time and the small, (meV range) value of the superconducting energy gap characterize the superconductor, leading to the efficient avalanche process even for infrared photons. | ||||
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| Area | Expedition | Conference | Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics. Postconference Technical Digest (IEEE Cat. No.01CH37170) | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1545 | |||
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| Author | Gershenzon, E. M.; Gol’tsman, G. N.; Sergeev, A.; Semenov, A. D. | ||||
| Title | Picosecond response of YBaCuO films to electromagnetic radiation | Type | Conference Article | ||
| Year | 1990 | Publication | Proc. European Conf. High-Tc Thin Films and Single Crystals | Abbreviated Journal | Proc. European Conf. High-Tc Thin Films and Single Crystals |
| Volume | Issue | Pages | 457-462 | ||
| Keywords | YBCO HTS detectors | ||||
| Abstract |
Radiation-induced change of the resistance was studied in the resistive state of YBaCuO films. Electron-phonon relaxation time T h was determmed from direct ep measurements and analysis of quasistationary electron heating. Temperature dependence of That TS 40 K was found to – ep be T h.. T'. The resul ts show that ep detectors with the response time of few picosecond at nitrogen temperature can be realized. | ||||
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| Publisher | Place of Publication | Editor | Gorzkowski, W.; Gutowski, M.; Reich, A.; Szymczak, H. | ||
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| Area | Expedition | Conference | European Conference , Ustroń, Poland , 30 Sept – 4 Oct 1989 | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1695 | |||
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| Author | Vachtomin, Y. B.; Antipov, S. V.; Maslennikov, S. N.; Smirnov, K. V.; Polyakov, S. L.; Zhang, W.; Svechnikov, S. I.; Kaurova, N. S.; Grishina, E. V.; Voronov, B. M.; Gol’tsman, G. N. | ||||
| Title | Quasioptical hot electron bolometer mixers based on thin NBN films for terahertz region | Type | Conference Article | ||
| Year | 2006 | Publication | Proc. 16th Int. Crimean Microwave and Telecommunication Technology | Abbreviated Journal | Proc. 16th Int. Crimean Microwave and Telecommunication Technology |
| Volume | 2 | Issue | Pages | 688-689 | |
| Keywords | NbN HEB mixers | ||||
| Abstract |
Presented in this paper are the performances of HEB mixers based on 2-3.5 nm thick NbN films integrated with log-periodic spiral antenna. Double side-band receiver noise temperature values are 1300 K and 3100 K at 2.5 THz and at 3.8 THz, respectively. Mixer gain bandwidth is 5.2 GHz. Local oscillator power is 1-3 muW for mixers with different active area | ||||
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| Language | Russian | Summary Language | Original Title | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 1445 | |||
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| Author | Gol’tsman, G. N.; Gershenzon, E. M. | ||||
| Title | High speed hot-electron superconducting bolometer | Type | Conference Article | ||
| Year | 1993 | Publication | Proc. SPIE | Abbreviated Journal | Proc. SPIE |
| Volume | 2104 | Issue | Pages | 181-182 | |
| Keywords | NbN HEb, Nb, Al | ||||
| Abstract |
Physical limitation of response time of a superconducting bolometer as well as the nature of non-equilibrium detection of radiation have been investigated for Al, Nb and NbN thin films in spectral range from submillimeter to near-infraredwavelengths [1,2]. In the case of ideal heat removal from the film with the f_‘. 100A thickness the detection mechanism is an electron heating effect that is not selective to radiation wavelength in a very broad range. The response time ofan electron heating bolometer is determined by an electron-phonon interaction time. This time is of about 10 ns, 0.5 ns and 20 ps for Al, Nb, and NbN correspondingly near the critical temperature of the superconducting film. Thesensitive area of the bolometer consists of a number of narrow strips (with awidth of 1µm) connected in parallel to contact pads; these pads together witha sapphire substrate and a ground plate represent the microstrip transmissionline with an impedance of 50 Q. | ||||
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| Publisher | SPIE | Place of Publication | Editor | Birch, J.R.; Parker, T.J. | |
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| Area | Expedition | Conference | 18th International Conference on Infrared and Millimeter Waves | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1652 | |||
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| Author | Zhang, J.; Pearlman, A.; Slysz, W.; Verevkin, A.; Sobolewski, R.; Okunev, O.; Korneev, A.; Kouminov, P.; Smirnov, K.; Chulkova, G.; Gol’tsman, G. N.; Lo, W.; Wilsher, K. | ||||
| Title | Infrared picosecond superconducting single-photon detectors for CMOS circuit testing | Type | Conference Article | ||
| Year | 2003 | Publication | CLEO/QELS | Abbreviated Journal | CLEO/QELS |
| Volume | Issue | Pages | Cmv4 | ||
| Keywords | NbN SSPD; SNSPD; Infrared; Quantum detectors; Electron beam lithography; Infrared detectors; Infrared radiation; Quantum efficiency; Single photon detectors; Superconductors | ||||
| Abstract |
Novel, NbN superconducting single-photon detectors have been developed for ultrafast, high quantum efficiency detection of single quanta of infrared radiation. Our devices have been successfully implemented in a commercial VLSI CMOS circuit testing system. | ||||
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| Publisher | Optical Society of America | Place of Publication | Editor | ||
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| Area | Expedition | Conference | Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1518 | |||
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