Research Updates
Electron transport lifetimes in InSb/Al1-xInxSb quantum well 2DEGs
We report magnetotransport measurements of InSb/Al1-xInxSb modulation doped quantum well (QW) structures and the extracted transport (tau(t)) and quantum (tau(q)) lifetime of carriers at low temperature (<2 K). D G Hayes, C P Allford, G V Smith, C McIndo, L A Hanks, A M Gilbertson, L F Cohen, S Zhang, E M Clarke, P D Buckle. Semicond.Sci.Technol. 32, 085002 (8pp) (2017).
Read MoreUniversal Growth Scheme for Quantum Dots with Low Fine-Structure Splitting at Various Emission Wavelengths
Efficient sources of individual pairs of entangled photons are required for quantum networks to operate using fiber-optic infrastructure. Joanna Skiba-Szymanska, R. Mark Stevenson, Christiana Varnava, Martin Felle, Jan Huwer, Tina Müller, Anthony J. Bennett, James P. Lee, Ian Farrer, Andrey B. Krysa, Peter Spencer, Lucy E. Goff, David A. Ritchie, Jon Heffernan, and Andrew J. Shields. PhysRevApplied, 8, 014013 (2017).
Read MorePhase-Tuned Entangled State Generation between Distant Spin Qubits
Quantum entanglement between distant qubits is an important feature of quantum networks. Distribution of entanglement over long distances can be enabled through coherently interfacing qubit pairs via photonic channels .....
Read MoreTemperature effects on an InGaP (GaInP) 55Fe X-ray photovoltaic cell
This paper investigates the effects of temperature on an InGaP (GaInP) 55Fe X-ray photovoltaic cell prototype for a radioisotope microbattery (also called a nuclear microbattery). An In0.5Ga0.5P p-i-n (5 ?m i-layer) mesa photodiode was illuminated by a standard 206 MBq 55Fe radioisotope X-ray source and characterised over the temperature range ?20?°C to 100?°C .....
Read MoreGenerating indistinguishable photons from a quantum dot in a noisy environment
Single photons from semiconductor quantum dots are promising resources for linear optical quantum computing, or, when coupled to spin states, quantum repeaters. To realize such schemes, the photons must exhibit a high degree of indistinguishability .....
Read MoreThin Al1xGaxAs0.56Sb0.44 diodes with extremely weak temperature dependence of avalanche breakdown
When using avalanche photodiodes (APDs) in applications, temperature dependence of avalanche breakdown voltage is one of the performance parameters to be considered. Hence, novel materials developed for APDs require dedicated experimental studies .....
Read MoreDetermination of the transport lifetime limiting scattering rate in InSb/Al1lnSb quantum wells using optical surface microscopy
We report magnetotransport measurements of InSb/Al1?xInxSb quantum well structures at low temperature (3 K), with evidence for 3 characteristic regimes of electron carrier density and mobility .....
Read MoreSpin-orbit interaction in InAs/GaSb heterostructures quantified by weak antilocalization
We study the spin-orbit interaction (SOI) in InAs/GaSb and InAs quantum wells .....
Read MorePath-dependent initialization of a single quantum dot exciton spin in a nanophotonic waveguide
We demonstrate a scheme for in-plane initialization of a single exciton spin in an InGaAs quantum dot (QD) coupled to a GaAs nanobeam waveguide .....
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