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Vol 48, No 22, 25 October 2012

  • Dr Dae-Hyun Kim

    Interview with Dae-Hyun Kim

    Dr Dae-Hyun Kim from Teledyne Technologies in California, talks about the research behind his Letter ‘Lg = 150 nm recessed quantum-well In0.7Ga0.3As MOS-HEMTs with Al2O3/In0.52Al0.48As composite insulator'.

  • A schematic view of how the frequencies are generated and processed through the setup. Inset: The experimental setup with the complete gain switching (GS)-OFCG (bottom-left) and the n-i-pn-i-p photomixer (top-right)

    Inside view

    An international team of researchers has developed a photonic sub-THz source with excellent signal quality, tunability and stability. Members of the Spanish arm of the team talk to us about the potential and challenges of photonic sub-THz generation.

  • Wangqing Yuan, James Irving and Doug Hall of the University of Notre Dame, part of the group who have shown how co-doping can improve optical fibre performance

    Shaking it up

    Ytterbium can improve absorption in erbium-doped wavelength amplifiers.

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Special issue

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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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Guarding gains

Researchers in Korea have designed and built a broadband antenna structure with high gain in the millimetre wave band. By introducing a guard ring resonator to a conventional patch antenna, the propagation of surface wave to the substrate edge was greatly reduced, and so the gain was increased.

Knitwear selection

The first experimental demonstration of a knitted, textile metamaterial has been presented by researchers in the UK. They have reported a low-pass and a high-pass frequency selective surface designed to operate at microwave frequencies for use in on-body communications, body-worn antennas and health sensing systems.

A favourable light

In the future, white LEDs are expected to replace conventional bulbs, and researchers in Italy have developed an efficient means for their manufacture. In particular, the dye for colour conversion is cheap, compared with inorganic phosphors, exhibits a larger Stokes shift (which means less self-absorption), is not hazardous to health and easy is to dispose of.

Remote check-up

Researchers in Japan have created a dual-mode antenna for body-centric wireless communications. The antenna consists of a signal electrode and a ground plane with an embedded L-shaped slit. On- and off- body communications could be achieved making the design ideal for personalised healthcare applications.

Far away power

Researchers in Germany have presented results of broad area lateral photonic band crystal lasers with quantum dot active area for the first time. Their laser demonstrates high output powers and simultaneously low vertical far field divergence, and will be of fundamental importance to semiconductor nanostructure as well as laser-diode device technologies.

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Cover of Electronics Letters, volume 50, issue 19

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