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Author Santavicca,D.F.; Reulet,B.; Karasik,B.S.; Pereverzev,S.V.; Olaya, D.; Gershenson, M.E.; Frunzio, L.; Prober, D.E.
Title Energy resolution of terahertz single-photon-sensitive bolometric detectors Type Journal Article
Year 2010 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 96 Issue 8 Pages 083505 - 083505-3
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Abstract We report measurements of the energy resolution of ultrasensitive superconducting bolometric detectors. The device is a superconducting titanium nanobridge with niobium contacts. A fast microwave pulse is used to simulate a single higher-frequency photon, where the absorbed energy of the pulse is equal to the photon energy. This technique allows precise calibration of the input coupling and avoids problems with unwanted background photons. Present devices have an intrinsic full-width at half-maximum energy resolution of approximately 23 THz, near the predicted value due to intrinsic thermal fluctuation noise.
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Call Number RPLAB @ akorneev @ Serial (up) 601
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Author Seki, T.; Shibata, H.; Takesue, H.; Tokura, Y.; Imoto, N.
Title Comparison of timing jitter between NbN superconducting single-photon detector and avalanche photodiode Type Journal Article
Year 2010 Publication Phys. C Abbreviated Journal Phys. C
Volume 470 Issue 20 Pages 1534-1537
Keywords SSPD; APD; jitter
Abstract We report the pulse-to-pulse timing jitter measurement of a niobium nitride (NbN) superconducting single-photon detector (SSPD) and an InGaAs avalanche photodiode (APD) at 1550-nm wavelength. A direct comparison of their timing jitter was performed by using the same experimental configuration to measure both detectors. The measured jitter of the SSPD and the APD are 75 and 84 ps at full-width at half-maximum (FWHM), and 138 and 384 ps at full-width at tenth-maximum (FWTM), respectively. The jitter of the SSPD remains small at FWTM while that of APD is wide. We also estimated the transmission distances and secure key generation rates for fiber-based quantum key distribution (QKD) which uses these detectors. The estimated transmission distances of the APD are 86 km and 107 km with respect to 1 ns and 100 ps time windows, respectively, and those of the SSPD are 125 km and 172 km with respect to 1 ns and 100 ps time windows, respectively. This estimation indicates the SSPDЃfs advantages for QKD compared to the APD.
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Call Number RPLAB @ akorneev @ Serial (up) 613
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Author Heeres, R.W.; Dorenbos, S.N.; Koene, B.; Solomon, G.S.; Kouwenhoven, L.P.; Zwiller, V.
Title On-Chip Single Plasmon Detection Type Journal Article
Year 2010 Publication Nano Letters Abbreviated Journal Nano Lett.
Volume 10 Issue Pages 661-664
Keywords optical antennas; SSPD; Single surface plasmons; superconducting detectors; semiconductor quantum dots; nanophotonics
Abstract Surface plasmon polaritons (plasmons) have the potential to interface electronic and optical devices. They could prove extremely useful for integrated quantum information processing. Here we demonstrate on-chip electrical detection of single plasmons propagating along gold waveguides. The plasmons are excited using the single-photon emission of an optically emitting quantum dot. After propagating for several micrometers, the plasmons are coupled to a superconducting detector in the near-field. Correlation measurements prove that single plasmons are being detected.
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Call Number RPLAB @ akorneev @ Serial (up) 620
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Author Жорес Алферов
Title Лекции на телеканале Культура. Полупроводниковая революция. Наука и общество. Type Miscellaneous
Year 2010 Publication Телеканал Культура Abbreviated Journal
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Call Number Serial (up) 622
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Author Karasik, Boris S.; Cantor, Robin
Title Optical NEP in hot-electron nanobolometers Type Journal Article
Year 2010 Publication Abbreviated Journal
Volume Issue Pages 1-7
Keywords HEB, Ti, NEP, femtowatt, SAFARI, SPICA, 650 GHz, 0.65 THz, 460 um, twin slot antenna, SQUID readout
Abstract For the first time, we have measured the optical noise equivalent power (NEP) in titanium (Ti) superconducting hot-electron nanobolometers (nano-HEBs). The bolometers were 2{\mu}mx1{\mu}mx20nm and 1{\mu}mx1{\mu}mx20nm planar antenna-coupled devices. The measurements were done at {\lambda} = 460 {\mu}m using a cryogenic black body radiation source delivering optical power from a fraction of a femtowatt to a few 100s of femtowatts. A record low NEP = 3x10^{-19} W/Hz^{1/2} at 50 mK has been achieved. This sensitivity meets the requirements for SAFARI instrument on the SPICA telescope. The ways for further improvement of the nano-HEB detector sensitivity are discussed.
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Notes To appear in Proc. 21st Int. Symp. on Spc. THz Technol., Oxford, UK, 23-25 March, 2010 Approved no
Call Number Serial (up) 623
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