Search

Your search keyword '"Lita, A. E."' showing total 19 results
Start Over Author "Lita, A. E." Publisher ieee
19 results on '"Lita, A. E."'

2. Superconducting nanowire avalanche photodetectors

Author

Nam, S., primary, Calkins, B., additional, Gerritts, T., additional, Harrington, S., additional, Lita, A. E., additional, Marsili, F., additional, Verma, V. B., additional, Vayshenker, I., additional, Mirin, R. P., additional, Shaw, M., additional, Farr, W., additional, and Stern, J. A., additional

Published
2013
Full Text
View/download PDF

3. High-efficiency Bragg grating enhanced on-chip photon-number-resolving detectors

Author

Mennea, P. L., primary, Calkins, B., additional, Metcalf, B. J., additional, Gerrits, T., additional, Lita, A. E., additional, Gates, J. C., additional, Kolthammer, W. S., additional, Spring, J. B., additional, Humphries, P. C., additional, Tomlin, N. A., additional, Fox, A. E., additional, Linares, A. Lamas, additional, Mirin, R. P., additional, Nam, S. W., additional, Walmsley, I. A., additional, and Smith, P. G. R., additional

Published
2013
Full Text
View/download PDF

4. Superconducting single photon detectors

Author

Nam, S., primary, Calkins, B., additional, Gerritts, T., additional, Harrington, S., additional, Lita, A. E., additional, Marsili, F., additional, Verma, V. B., additional, Vayshenker, I., additional, Mirin, R. P., additional, Shaw, M., additional, Farr, W., additional, and Stern, J. A., additional

Published
2013
Full Text
View/download PDF

5. Experimental decoy state quantum key distribution

Author

Rosenberg, D., primary, Harrington, J. W., additional, Rice, P. R., additional, Hiskett, P. A., additional, Peterson, C. G., additional, Hughes, R. J., additional, Lita, A. E., additional, Name, S., additional, and Nordholt, J. E., additional

Published
2007
Full Text
View/download PDF

6. Tuning of Tungsten Thin Film Superconducting Transition Temperature for Fabrication of Photon Number Resolving Detectors.

Author

Lita, A. E., Rosenberg, D., Nam, S., Miller, A. J., Baizar, D., Kaatz, L. M., and Schwall, R. E.

Subjects
*THIN films, *PHYSICS instruments, *SUPERCONDUCTORS, *DETECTORS, *COATING processes, *OPTICS
Abstract

Tungsten thin films can form in one of two crystal structures: alpha (bcc), with a superconducting transition temperature (Ta) of 15 mK, and beta (A15), with a Tc between 1 and 4 K. Films with intermediate us are composed of both alpha and beta phases. We have investigated how to tune the film Tc in order to obtain certain values (Tc ∼ 100 mK) suitable for the fabrication of photon number resolving transition-edge sensor (TES) and arrays of TES detectors for astronomical and quantum information applications. Variation of deposition conditions, and also the choice of the underlayer/coating for equal deposition conditions, affect the TcS of tungsten films. We have used x-ray diffraction to determine the structure of tungsten thin films and film stress. The results indicates that the film stress state depends on the underlying substrate and coating. To understand the variation of Tc values and to allow precise tuning of these values, we have investigated substrates and coatings for tungsten film multilayer stacks and determined tungsten film stress by x-ray diffraction at both room temperature and 8K. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

7. Performance of Photon-Number Resolving Transition-Edge Sensors With Integrated 1550 nm Resonant Cavities.

Author

Rosenberg, D., Lita, A. E., Miller, A. J., Nam, S., and Schwall, R. E.

Subjects
*DETECTORS, *ENGINEERING instruments, *AUTOMATIC control systems, *QUANTUM electrodynamics, *QUANTUM field theory, *TECHNICAL specifications
Abstract

Many quantum-information applications require high-efficiency, low-noise, single-photon detectors that op crate at visible and near-infrared wavelengths. The tunable superconducting critical temperature and anomalously low electron-phonon coupling of tungsten make it a suitable material for the fabrication of transition-edge sensors (TESs) that meet these requirements. The quantum efficiency of a typical tungsten TES detector, intrinsically around 15% at 1550 nm, can be increased by placing the tungsten detector in a resonant cavity, but the performance of a device embedded in a cavity has not been tested previously. We demonstrate that the presence of the cavity does not adversely affect the sensitivity or response time, and we report on the device characteristics of a new generation of tungsten TESs with greater than 80% quantum efficiency at 1550 nm. [ABSTRACT FROM AUTHOR]

Published
2005
Full Text
View/download PDF

8. A strong loophole-free test of local realism.

Author

Shalm, Lynden K., Meyer-Scott, Evan, Christensen, Bradley G., Bierhorst, Peter, Wayne, Michael A., Stevens, Martin J., Gerrits, Thomas, Glancy, Scott, Hamel, Deny R., Allman, Michael S., Coakley, Kevin J., Dyer, Shellee D., Hodge, Carson, Lita, Adriana E., Verma, Varun B., Lambrocco, Camilla, Tortorici, Edward, Migdall, Alan L., Zhang, Yanbao, and Kumor, Daniel R.

Published
2016

16. Extending single-photon optimized superconducting transition edge sensors beyond the single-photon counting regime.

Author

Gerrits, T., Calkins, B., Tomlin, N., Lita, A. E., Migdall, A., Mirin, R. P., and Nam, S. W.

Abstract

We illuminate a photon-number-resolving transition edge sensor with strong pulses of light containing up to 6.7 million photons (0.85 pJ per pulse). These bright pulses heat the sensor far beyond its transition edge into the normal resistance regime. We show that the sensor operates from the single-photon-counting regime to picowatt levels of light and that the detection noise is below shot-noise for up to 1000 photons. [ABSTRACT FROM PUBLISHER]

Published
2012

17. Transition edge sensors with low timing jitter at 1550 nm.

Author

Lamas-Linares, Antia, Gerrits, Thomas, Tomlin, Nathan A., Lita, Adriana E., Calkins, Brice, Beyer, Jorn, Mirin, Richard P., and Nam, Sae Woo

Abstract

Transition edge sensors have demonstrated near unity detection efficiency of single photons and photon number resolving ability over a wide wavelength range (≈ 700–1600 nm). They are also known to be slow, with timing jitter values in the ≈ 100 ns range, and the best current values in the ≈ 20ns range. We report measured jitter times below 5ns for a tungsten TES. This is particularly relevant for experiments clocked from an 80MHz Ti:Sa laser. [ABSTRACT FROM PUBLISHER]

Published
2012

18. 55% System detection efficiency with self-aligned WSi superconducting nanowire single-photon detectors.

Author

Verma, V. B., Marsili, F., Baek, B., Lita, A. E., Gerrits, T., Stern, J. A., Mirin, R. P., and Nam, S. W.

Abstract

We report a system detection efficiency of 55 % at 1500 nm with an amorphous tungsten-silicide (WSi) superconducting nanowire single-photon detector (SNSPD) using a self-aligned packaging scheme for alignment of the detector and optical fiber. [ABSTRACT FROM PUBLISHER]

Published
2012

19. On-chip, photon-number-resolving, telecom-band detectors for scalable photonic information processing.

Author

Gerrits, T., Thomas-Peter, N., Gates, J. C., Lita, A. E., Metcalf, B. J., Calkins, B., Tomlin, N. A., Fox, A. E., Linares, A. Lamas, Spring, J. B., Langford, N. K., Mirin, R. P., Smith, P. G. R., Walmsley, I. A., and Nam, S. W.

Abstract

We demonstrate an integrated photon-number resolving detector, operating in the telecom band at 1550 nm, employing an evanescently coupled design that allows the detector to be placed at arbitrary locations within a planar optical circuit. Up to 5 photons are resolved in the guided optical mode via absorption from the evanescent field into a tungsten transition-edge sensor. The detection efficiency of the absorbing tungsten region is 7.2 %. [ABSTRACT FROM PUBLISHER]

Published
2012

Catalog

Books, media, physical & digital resources
See catalog results