Research Updates

August 2017

Phase-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 .....

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July 2017

Temperature 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 .....

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June 2017

Generating 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 .....

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May 2017

Thin 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 .....

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May 2017

Determination 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 .....

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May 2017

Spin-orbit interaction in InAs/GaSb heterostructures quantified by weak antilocalization

We study the spin-orbit interaction (SOI) in InAs/GaSb and InAs quantum wells .....

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April 2017

Path-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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