Vol 49, No 5, 07 March 2013

  • Oscar Gustafsson

    Interview with Oscar Gustafsson

    Dr Oscar Gustafsson from Linkoping University in Sweden talks about the research behind his paper ‘Unified Architecture for 2, 3, 4, 5, and 7-point DFTs Based on the Winograd Fourier Transform Algorithm'

  • Two examples of metamaterial-based cavities

    Aiming for the sky

    Aerospace oriented, compact, single-source antenna with 56° range beam steering

  • From left to right:Enrique Villa, Luisa de la Fuente, Eduardo Artal, Jaime Cagigas and Beatriz Aja

    Phase space

    High frequency measurements expose the cosmic microwave background

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A grate tune

Researchers in the UK and Germany have developed a tunable quantum-dot based ultrashort pulse master oscillator power amplifier.  They have achieved a 118-nm tuning range (1165-1283 nm) from 2nd-order grating diffraction, making the laser useful for non-linear imaging techniques, especially in the biomedical field.

Implant shields

MRI is often not possible for patients who have implanted medical devices such as pacemakers, implantable cardioverter and deep brain stimulators. Now, researchers in Korea have designed a medical implant to reduce the scattered electric fields, helping to make MRI safe for patients with metallic implants.

Why so difficult

The difficult nature of stimulated Brillouin scattering (SBS) in polymer optical fibres (POF) has been clarified by researchers in Japan by the observation of SBS in a silica graded-index multimode optical fibre with the same core diameter and length as those of a POF. They conclude that the difficulty lies in the material problems and not in the physical problems (multimode nature, etc).

A weathering look

Researchers in Italy present an optical approach to assessing road conditions such as the presence of ice and rain. Based on measuring the polarisation contrast in reflection and intensity of the diffused light in the near infrared, the method is applicable for a range of applications including road and air traffic safety.

Drops of gold

Improvement of the absorption of PbS colloidal quantum dot films (CQD) using plasmonic scattering has been studied by researchers in Turkey. They have developed an integrated circuit compatible method of introducing colloidal gold nanoparticles to PbS film during spin deposition. The work aims to produce low cost IC compatible IR detectors with improved responsivity

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Cover of Electronics Letters, Volume 49, Issue 25

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