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Author Brown, E. R.; Lee, A. W. M.; Navi, B. S.; Bjarnason, J. E.
Title Characterization of a planar self-complementary square-spiral antenna in the THz region Type Journal Article
Year 2006 Publication Microwave and Optical Technology Letters Abbreviated Journal Microwave Opt Technol Lett
Volume 48 Issue 3 Pages 524-529
Keywords 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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Call Number RPLAB @ gujma @ Serial 736
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Author 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 Type Journal Article
Year 2006 Publication Nature Physics Abbreviated Journal Nat. Phys.
Volume 2 Issue 10 Pages 678-682
Keywords 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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Call Number RPLAB @ gujma @ Serial 795
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Title ГОСТ 2.120-73. ЕСКД. Технический проект Type Book Whole
Year 2006 Publication Abbreviated Journal
Volume Issue Pages
Keywords gost, detproj
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Call Number Serial 860
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Author
Title ГОСТ 2.501-88. ЕСКД. Правила учета и хранения Type Book Whole
Year 2006 Publication Abbreviated Journal
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Keywords gost, detproj
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Call Number Serial 862
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Author
Title ГОСТ 3.1102-81. ЕСТД. Стадии разработки и виды документов Type Book Whole
Year 2006 Publication Abbreviated Journal
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Keywords gost, detproj
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Call Number Serial 868
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Author
Title ГОСТ 3.1121-84. ЕСТД. Общие требования к комплектности и оформлению документов на типовые и групповые технологические процессы (операции) Type Book Whole
Year 2006 Publication Abbreviated Journal
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Keywords gost, detproj
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Call Number Serial 870
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Author Irwin, K.D.
Title Thermodynamics of nonlinear bolometers near equilibrium Type Conference Article
Year 2006 Publication Proc. 11th International Workshop on Low Temp. Detectors Abbreviated Journal Proc. 11th International Workshop on Low Temp. Detectors
Volume 559 Issue 2 Pages 718-720
Keywords bolometers, microcalorimeters, nonlinear thermodynamics, nonequilibrium
Abstract We present the first thermodynamically correct calculation of the noise in a simple nonlinear resistive bolometer or calorimeter operated out of equilibrium. The solution is rigorous only for first- and second-order deviations from equilibrium, and for the linear and quadratic terms of dissipative elements. In contrast, existing models of noise in resistive bolometers are based on the application of equilibrium theories to a system that is often nonlinear and out of equilibrium. We derive solutions applicable both in and out of steady state. The noise has power spectral density different from the equilibrium theory, and it has higher-order correlations and non-Gaussian characteristics. The results do not apply to non-Markovian hidden variables in the bolometer.
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Call Number Serial 915
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Author Baryshev A.; Hovenier J.N.; Adam A.J.L.; Kašalynas I.; Gao J.R.; Klaassen T.O.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L.
Title Phase locking and spectral linewidth of a two-mode terahertz quantum cascade laser Type Journal Article
Year 2006 Publication Physics Letters Abbreviated Journal
Volume 89 Issue Pages
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Abstract We have studied the phase locking and spectral linewidth of an ~ 2.7 THz quantum cascade laser by mixing its two lateral lasing modes. The beat signal at about 8 GHz is compared with a microwave eference by applying conventional phase lock loop circuitry with feedback to the laser bias current. Phase locking has been demonstrated, resulting in a narrow beat linewidth of less than 10 Hz. Under requency stabilization we find that the terahertz line profile is essentially Lorentzian with a minimum linewidth of ~ 6.3 kHz. Power dependent measurements suggest that this linewidth does not approach the Schawlow-Townes limit.
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Call Number RPLAB @ atomics90 @ Serial 967
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Author Hovenier J.N.; Adam A.J.L.; Kašalynas I.; Gao J.R.; Klaassen T.O.; Baryshev A.; Williams B.S.; Kumar S.; Hu Q.; Reno J.L.
Title Phase-locking on the beat signal of a two-mode 2.7 terahertz metal-metal quantum cascade laser Type Conference Article
Year 2006 Publication Proc. Symp. IEEE/LEOS Benelux Chapter Abbreviated Journal
Volume Issue Pages 125-128
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Abstract We have studied the linewidth and phase-locking of a 2.7 THz quantum cascade laser by using a superconducting bolometer mixer. The 8 GHz beat signal is compared with a microwave reference with a feedback to the laser bias current. Phase locking has been demonstrated, resulting in an extremely narrow beat linewidth of less than 10 Hz. Under frequency-stabilization conditions we find that the line profile is virtually Lorentzian with a long-term minimum linewidth of the THz modes of about 6.3 kHz. Temperature dependent measurements suggestthat this linewidthdoes not approach the Schawlow-Townes limit.
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Call Number RPLAB @ atomics90 @ Serial 968
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Author Chulkova, G.; Milostnaya, I.; Tarkhov, M.; Korneev, A.; Minaeva, O.; Voronov, B.; Divochiy, A.; Gol'tsman, G.; Kitaygorsky, J.; Pan, D.; Sobolewski, R.
Title Superconducting single-photon nanostructured detectors for advanced optical applications Type Conference Article
Year 2006 Publication Proc. Symposium on Photonics Technologies for 7th Framework Program Abbreviated Journal
Volume 400 Issue Pages
Keywords SSPD, SNSPD
Abstract We present superconducting single-photon detectors (SSPDs) based on NbN thin-film nanostructures and operated at liquid helium temperatures. The SSPDs are made of ultrathin NbN films (2.5-4 nm thick, Tc= 9-11K) as meander-shaped nanowires covering the area of 10× 10 µm2. Our detectors are operated at the temperature well below the critical temperature Tc and are DC biased by a current Ib close to the meander critical current Ic. The operation principle of the detector is based on the use of the resistive region in a narrow ultra-thin superconducting stripe upon the absorption of an incident photon. The developed devices demonstrate high sensitivity and response speed in a broadband range from UV to mid-IR (up to 6 µm), making them very attractive for advanced optical technologies, which require efficient detectors of single quanta and low-density optical radiation.
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Call Number RPLAB @ sasha @ chulkova2006superconducting Serial 1021
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