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| Title |
Heterodyne detection: II. Astronomy 525. Lecture 30 |
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Miscellaneous |
| Year |
2006 |
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| Keywords |
detector, mixer, heterodyne detection, mixing |
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no |
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542 |
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Cherednichenko, S.; Drakinskiy, V.; Baubert, J.; Lecomte, B.; Dauplay, F.; Krieg, J. M.; Delorme, Y.; Feret, A.; Hübers, H. W.; Semenov, A. D.; Gol'tsman, G. N. |
| Title |
2.5 THz multipixel heterodyne receiver based on NbN HEB mixers |
Type |
Conference Article |
| Year |
2006 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
| Volume |
6275 |
Issue |
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Pages |
62750I (1 to 11) |
| Keywords |
HEB, mixer, membrane |
| Abstract |
A 16 pixel heterodyne receiver for 2.5 THz has been developed based on NbN superconducting hot-electron bolometer (HEB) mixers. The receiver uses a quasioptical RF coupling approach where HEB mixers are integrated into double dipole antennas on 1.5 µm thick Si3N4/SiO2 membranes. Spherical mirrors (one per pixel) and backshort distance from the antenna have been used to design the output mixer beam profile. The camera design allows all 16 pixel IF readout in parallel. The gain bandwidth of the HEB mixers on Si3N4/SiO2 membranes was found to be 0.7÷0.9 GHz, which is much smaller than for similar devices on silicon. Application of buffer layers and use of alternative types of membranes (e.g. silicon-on-insulator) is under investigation. |
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561 |
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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 |
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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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Stevens, M.; Hadfield, R.; Schwall, R.; Nam, S.W.; Mirin, R.; Gupta, J. |
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Fast lifetime measurements of infrared emitters using a low-jitter superconduct- ing single-photon detector |
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Journal Article |
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2006 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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89 |
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031109 |
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SSPD, jitter, QD, QW |
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no |
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RPLAB @ akorneev @ |
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611 |
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Stevens, M.; Hadfeld, R.; Schwall, R.; Nam, S.W.; and Mirin, R. |
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Quantum dot single photon sources studied with superconducting single photon detectors |
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Journal Article |
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2006 |
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IEEE J. Sel. Topics Quantum Electron. |
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12 |
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6 |
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1255-1267 |
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SSPD, jitter, QD, QW |
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RPLAB @ akorneev @ |
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612 |
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Walther, Christoph; Scalari, Giacomo; Faist, Jerome; Beere, Harvey; Ritchie, David |
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Low frequency terahertz quantum cascade laser operating from 1.6 to 1.8 THz |
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Journal Article |
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2006 |
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Applied Physics Letters |
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Appl. Phys. Lett. |
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89 |
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231121(1-3) |
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QCL, 360 uW at 1.6 THz |
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The authors report a GaAs/Al0.1Ga0.9As quantum cascade laser based on a bound-to-continuum transition optimized for low frequency operation. High tunability of the gain curve is achieved by the Stark effect and laser emission is measured between 1.6 and 1.8 THz. Pulsed mode operation up to 95 K and continuous wave operation up to 80 K are reported. The dynamical range in current is as high as 43%. |
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629 |
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Brown, E. R.; Lee, A. W. M.; Navi, B. S.; Bjarnason, J. E. |
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Characterization of a planar self-complementary square-spiral antenna in the THz region |
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Journal Article |
| Year |
2006 |
Publication |
Microwave and Optical Technology Letters |
Abbreviated Journal |
Microwave Opt Technol Lett |
| Volume |
48 |
Issue |
3 |
Pages |
524-529 |
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optical antennas; square spiral antenna; self complementary THz; photomixing; lens; method of moments; geometric optics; physical optics |
| Abstract |
This paper describes a compact, self-complementary square-spiral antenna on a GaAs substrate with a broadside high-directivity (~9 dB) frequency-independent pattern when coupled through a silicon hyperhemisphere. The driving-point resistance undulates between ~00 and 300Ω from 200 GHz to 1 THz—much higher than the 72Ω value from Booker's modified formula, but quite beneficial for coupling to high-impedance broadband devices |
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RPLAB @ gujma @ |
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736 |
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Zhang, Qiang; Goebel, Alexander; Wagenknecht, Claudia; Chen, Yu-Ao; Zhao, Bo; Yang, Tao; Mair, Alois; Schmiedmayer, Jörg; Pan, Jian-Wei |
| Title |
Experimental quantum teleportation of a two-qubit composite system |
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Journal Article |
| Year |
2006 |
Publication |
Nature Physics |
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Nat. Phys. |
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2 |
Issue |
10 |
Pages |
678-682 |
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fromIPMRAS; quantum teleportation |
| Abstract |
Quantum teleportation, a way to transfer the state of a quantum system from one location to another, is central to quantum communication and plays an important role in a number of quantum computation protocols. Previous experimental demonstrations have been implemented with single photonic or ionic qubits. However, teleportation of single qubits is insufficient for a large-scale realization of quantum communication and computation. Here, we present the experimental realization of quantum teleportation of a two-qubit composite system. In the experiment, we develop and exploit a six-photon interferometer to teleport an arbitrary polarization state of two photons. The observed teleportation fidelities for different initial states are all well beyond the state estimation limit of 0.40 for a two-qubit system. Not only does our six-photon interferometer provide an important step towards teleportation of a complex system, it will also enable future experimental investigations on a number of fundamental quantum communication and computation protocols |
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RPLAB @ gujma @ |
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ГОСТ 2.120-73. ЕСКД. Технический проект |
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2006 |
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gost, detproj |
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860 |
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ГОСТ 2.501-88. ЕСКД. Правила учета и хранения |
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2006 |
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gost, detproj |
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