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Author Shelkovnikov, A.; Grain, C.; Nguyen, C. T.; Butcher, R. J.; Amy-Klein, A.; Chardonnet, C.
Title 500-Hz two-photon Ramsey fringes with a SF6 beam: towards a new frequency standard in the 30-THz spectral region Type Journal Article
Year 2001 Publication Applied Physics B: Lasers and Optics Abbreviated Journal Appl. Phys. B: Lasers and Optics
Volume (up) 73 Issue Pages 93-98
Keywords THz applications
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Notes Approved no
Call Number Serial 485
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Author Tol, J. van; Brunel, L.-C.; Wylde, R. J.
Title A quasioptical transient electron spin resonance spectrometer operating at 120 and 240 GHz Type Journal Article
Year 2005 Publication Rev. Sci. Instrum. Abbreviated Journal Rev. Sci. Instrum.
Volume (up) 76 Issue 7 Pages 074101 (1 to 8)
Keywords Schottky, noise temperature
Abstract A new multifrequency quasioptical electron paramagnetic resonance (EPR) spectrometer is described. The superheterodyne design with Schottky diode mixer/detectors enables fast detection with subnanosecond time resolution. Optical access makes it suitable for transient EPR (TR-EPR) at 120 and 240 GHz. These high frequencies allow for an accurate determination of small g-tensor anisotropies as are encountered in excited triplet states of organic molecules like porphyrins and fullerenes. The measured concentration sensitivity for continuous-wave (cw) EPR at 240 GHz and at room temperature without cavity is 1013 spins/cm3 (15 nM) for a 1 mT linewidth and a 1 Hz bandwidth. With a Fabry-Perot cavity and a sample volume of 30 nl, the sensitivity at 240 GHz corresponds to [approximate]3×109 spins for a 1 mT linewidth. The spectrometer's performance is illustrated with applications of transient EPR of excited triplet states of organic molecules, as well as cw EPR of nitroxide reference systems and a thin film of a colossal magnetoresistance material.
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Notes Actually, noise spectral density is given (3e-19 W/Hz) Approved no
Call Number Serial 588
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Author Zwiller, Vale<cc><81>ry; Blom, Hans; Jonsson, Per; Panev, Nikolay; Jeppesen, Sören; Tsegaye, Tedros; Goobar, Edgard; Pistol, Mats-Erik; Samuelson, Lars; Björk, Gunnar
Title Single quantum dots emit single photons at a time: Antibunching experiments Type Journal Article
Year 2001 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume (up) 78 Issue 17 Pages 2476
Keywords antibunching, quantum dot
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ISSN 0003-6951 ISBN Medium
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Call Number Serial 502
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Author Julia Toussaint, Roman Grüner, Marco Schubert, Torsten May, Hans-Georg Meyer, Benjamin Dietzek, Jürgen Popp, Matthias Hofherr, Matthias Arndt, Dagmar Henrich, Konstantin Il'in, and Michael Siegel
Title Superconducting single-photon counting system for optical experiments requiring time-resolution in the picosecond range Type Journal Article
Year 2012 Publication Abbreviated Journal AIP REVIEW OF SCIENTIFIC INSTRUMENTS
Volume (up) 83 Issue Pages
Keywords SSPD, picosecond, time-resolution
Abstract We have developed a cryogenic measurement system for single-photon counting, which can be used

in optical experiments requiring high time resolution in the picosecond range. The system utilizes

niobium nitride superconducting nanowire single-photon detectors which are integrated in a timecorrelated

single-photon counting (TCSPC) setup. In this work, we describe details of the mechanical

design, the electrical setup, and the cryogenic optical components. The performance of the complete

system in TCSPC mode is tentatively benchmarked using 140 fs long laser pulses at a repetition

frequency of 75MHz. Due to the high temporal stability of these pulses, the measured time resolution

of 35 ps (FWHM) is limited by the timing jitter of the measurement system. The result was crosschecked

in a Coherent Anti-stokes Raman Scattering (CARS) setup, where scattered pulses from a

β-barium borate crystal have been detected with the same time resolution.
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Notes Approved no
Call Number RPLAB @ seleznev @ Serial 885
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Author An, Zhenghua; Chen, Jeng-Chung; Ueda, T.; Komiyama, S.; Hirakawa, K.
Title Infrared phototransistor using capacitively coupled two-dimensional electron gas layers Type Journal Article
Year 2005 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume (up) 86 Issue Pages 172106 - 172106-3
Keywords 2DEG
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Notes Approved no
Call Number RPLAB @ akorneev @ Serial 603
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