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Going the distance
Long-reach 100 Gbit/s Ethernet could be on the horizon with a new avalanche photodiode receiver.
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Interview with Michael Kelly
Professor Michael Kelly from Cambridge University in the UK talks about the research behind his Letter Highly reproducible tunnel currents in MBE-grown semiconductor multilayer.
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Alternative reading
Researchers in the US can read memristor array memory using AC techniques to reduce power leakage and power consumption.
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Vol 48, No 13, 21 June 2012
What's new?
Follow us on Twitter
Electronics Letters is now on Twitter! Follow @ElecLett for the latest news and highlights from each issue!
Open Access
Electronics Letters, along with all IET journals, now offers authors the option to publish their paper open access.
Past Issues
Past issues
See feature articles and interviews from recent issues of Electronics Letters.
To access the full content of all past issues please visit the IET Digital Library.
Special issue
Semiconductors in Personalised Medicine
A special supplement to Electronics Letters that reflects on the growth of semiconductors as the enabling technology to help with some of the global healthcare challenges that we face today.
Also in this issue
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Double accuracy
Researchers in France have presented the first cross-correlation measurements using a two-photon absorption process in a semiconductor for two optical pulses of different wavelengths and durations. The method may provide a simple, clean, reliable and highly integrable multipurpose tool to synchronise beams, measure jitters or perform accurate picosecond pulse measurements.
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Body tuning
A tunable resonator based on change of substrate permittivity has been fabricated using a new high-performance liquid crystal suitable for body-centric communications by researchers from Australia and Germany. Their results show a frequency tuning range of 8.2% around a centre frequency of 2.8 GHz, with a lower insertion loss compared to standard liquid crystals.
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Titanic power
A MEMS-based lead magnesium niobate-lead titanate (PMN-PT) energy harvester has been proposed by collaborating researchers in China and Japan. Compared with a conventional piezoelectric material, the PMN-PT single crystal has a higher coupling coefficient and electromechanical coefficient, which can improve the conversion efficiency of the implemented power generating device.
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Key cutting
A demonstration that the Goldberg–Vaidman GV95 quantum key distribution (QKD) protocol is feasible over 1 km long optical fibres is reported in work from Brazil and Chile. With inferred quantum BER comparable to many other QKD setups, the work also suggests it should be possible to extend the range to a dozen kilometres by employing a faster piezoelectric actuator.
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Matchmaker
Researchers in Italy report broadband second harmonic generation between 930 and 970 nm using random quasi-phase matching (QPM) in a planar waveguide fabricated by soft proton exchange in congruent lithium tantalate. Compared to bulk samples, the guided-wave frequency doubler in random QPM is highly broadband and more efficient, owing to the confined nature of the interacting waves and to spectral phase matching twice as densely populated.
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