Search Results - "Ritchie, D.A."

Coherent dynamics of a telecom-wavelength entangled photon source by Ward, M.B., Dean, M.C., Stevenson, R.M., Bennett, A.J., Ellis, D.J.P., Cooper, K., Farrer, I., Nicoll, C.A., Ritchie, D.A., Shields, A.J.

“…Quantum networks can interconnect remote quantum information processors, allowing interaction between different architectures and increasing net computational…”
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Comparative study of low magnetic field effects in finger-finger and finger-split gate single electron pumps by Hanief, N., Blumenthal, M.D., Howe, H., Beere, H.E., Mitchell, T., Ritchie, D.A., Pepper, M.

“…Single Electron Pump (SEP) devices that can deliver single electrons at high frequencies are fabricated using two different gate geometries. The pump quantum…”
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Imaging in osteofibrous dysplasia, osteofibrous dysplasia-like adamantinoma, and classic adamantinoma by Bethapudi, S, Ritchie, D.A, MacDuff, E, Straiton, J

“…Fibro-osseous lesions of the bone are well-recognized primary bone tumours. However, given the degree of overlap of imaging findings and variation in…”
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Mode-locking of a terahertz laser by direct phase synchronization by Maysonnave, J, Maussang, K, Freeman, J R, Jukam, N, Madéo, J, Cavalié, P, Rungsawang, R, Khanna, S P, Linfield, E H, Davies, A G, Beere, H E, Ritchie, D A, Dhillon, S S, Tignon, J

“…A novel scheme to achieve mode-locking of a multimode laser is demonstrated. Traditional methods to produce ultrashort laser pulses are based on modulating the…”
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Commentary on ultrasound for initial evaluation and triage of clinically suspicious soft-tissue masses by Ritchie, D.A

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Fludrocortisone for the Prevention of Vasovagal Syncope by Sheldon, Robert, MD, PhD, Raj, Satish R., MD, MSci, Rose, M. Sarah, PhD, Morillo, Carlos A., MD, Krahn, Andrew D., MD, Medina, Eduardo, MD, Talajic, Mario, MD, Kus, Teresa, MD, PhD, Seifer, Colette M., MD, Lelonek, Malgorzata, MD, PhD, Klingenheben, Thomas, MD, Parkash, Ratika, MD, Ritchie, Debbie, MN, McRae, Maureen, RN

“…Abstract Background There is limited evidence whether being on fludrocortisone prevents vasovagal syncope. Objectives The authors sought to determine whether…”
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Quantum Cascade Detectors by Giorgetta, F.R., Baumann, E., Graf, M., Quankui Yang, Manz, C., Kohler, K., Beere, H.E., Ritchie, D.A., Linfield, E., Davies, A.G., Fedoryshyn, Y., Jackel, H., Fischer, M., Faist, J., Hofstetter, D.

“…This paper gives an overview on the design, fabrication, and characterization of quantum cascade detectors. They are tailorable infrared photodetectors based…”
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Commentary on the MRI appearances of early osteomyelitis and discitis by Ritchie, D.A

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Frequency Manipulation of THz Bound-to-Continuum Quantum-Cascade Lasers by Freeman, J.R., Worrall, C., Apostolopoulos, V., Alton, J., Beere, H., Ritchie, D.A.

“…The laser emission frequencies of existing designs are controlled by uniform thickness transformations. Experimental results from a total of ten wafers are…”
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Substrate temperature measurement using a commercial band-edge detection system by Farrer, I., Harris, J.J., Thomson, R., Barlett, D., Taylor, C.A., Ritchie, D.A.

“…We report on the use of a commercially available band-edge detection system for substrate temperature monitoring of gallium arsenide substrates. The extension…”
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Distributed Feedback THz Quantum-Cascade Lasers Using Thin Double-Metallic Gratings by Marshall, O., Alton, J., Worrall, C., Beere, H., Ritchie, D.A., Barbieri, S.

“…Distributed feedback quantum-cascade lasers based on loss-coupled two-metal gratings are presented. Devices lasing on single longitudinal modes between 2.62…”
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Quantum-Dot Sources for Single Photons and Entangled Photon Pairs by Young, Robert J., Ellis, David J. P., Stevenson, R. Mark, Bennett, Anthony J., Atkinson, Paola, Cooper, Ken, Ritchie, David A., Shields, Andrew J.

“…Quantum dots show excellent promise as triggered sources of both single and polarization entangled photons for quantum information applications. Our recent…”
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GaAs facet formation and progression during MBE overgrowth of patterned mesas by Atkinson, P., Ritchie, D.A.

“…The overgrowth of pre-patterned (1 0 0) GaAs substrates by molecular beam epitaxy (MBE) under different substrate temperature and arsenic overpressure…”
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Observation of Phonon Replica Emission in an In-Situ Fe/GaAs Spin LED by Mansell, R., Laloe, J.-B., Holmes, S.N., Khan, I., Yasar, M., Petrou, A., Farrer, I., Jones, G., Ritchie, D.A., Bland, J.

“…GaAs-based spin LEDs were used to study spin injection through a Schottky barrier from a ferromagnetic contact formed by an in-situ technique. Optical…”
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Frequency Characterization of a Terahertz Quantum-Cascade Laser by Beverini, N., Carelli, G., De Michele, A., Moretti, A., Mahler, L., Tredicucci, A., Beere, H.E., Ritchie, D.A.

“…In this paper, the frequency characteristics of a terahertz quantum-cascade laser (QCL) operating around 2.5-THz in the pulsed regime have been studied by…”
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Continuous-wave operation of terahertz quantum-cascade lasers by Barbieri, S., Alton, J., Dhillon, S.S., Beere, H.E., Evans, M., Linfield, E.H., Davies, A.G., Ritchie, D.A., Kohler, R., Tredicucci, A., Beltram, F.

“…We report continuous-wave (CW) operation of a 4.4-THz quantum-cascade laser grown in the GaAs-AlGaAs materials system by molecular beam epitaxy. The device…”
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Terahertz Quantum Cascade Devices: From Intersubband Transition to Microcavity Laser by Unterrainer, K., Benz, A., Darmo, J., Deutsch, C., Fasching, G., Kroll, J., Kelly, D.P., Martl, M., Muller, T., Parz, W., Dhillon, S.S., Sirtori, C., Andrews, A.M., Schrenk, W., Strasser, G., Marcadet, X., Calligaro, M., Beere, H.E., Ritchie, D.A.

“…In this review, we report on the study of terahertz (THz) intersubband (ISB) transitions and on the optical devices based on them. We use time-resolved THz…”
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Harvesting dissipated energy with a mesoscopic ratchet by Roche, B., Roulleau, P., Jullien, T., Jompol, Y., Farrer, I., Ritchie, D.A., Glattli, D.C.

“…The search for new efficient thermoelectric devices converting waste heat into electrical energy is of major importance. The physics of mesoscopic electronic…”
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The excitation spectrum of quantum antidots by Michael, C.P., Kataoka, M., Ford, C.J.B., Faini, G., Mailly, D., Simmons, M.Y., Ritchie, D.A.

“…Source-drain bias measurements of transport across quantum antidots reveal a ladder of excited states analogous to the excitation spectrum of quantum dots. The…”
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The ‘penumbra sign’ on T1-weighted MR imaging in subacute osteomyelitis: Frequency, cause and significance by Grey, A.C., Davies, A.M., Mangham, D.C., Grimer, R.J., Ritchie, D.A.

“…Objective: We studied the frequency and cause of a feature exhibited on T1-weighted (T1-W) magnetic resonance (MR) imaging termed the ‘penumbra sign’ in a…”
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