Metal–insulator–semiconductor optoelectronic fibres

Mehmet Bayindir (), Fabien Sorin, Ayman F. Abouraddy, Jeff Viens, Shandon D. Hart, John D. Joannopoulos and Yoel Fink ()
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Mehmet Bayindir: Massachusetts Institute of Technology
Fabien Sorin: Massachusetts Institute of Technology
Ayman F. Abouraddy: Massachusetts Institute of Technology
Jeff Viens: Massachusetts Institute of Technology
Shandon D. Hart: Massachusetts Institute of Technology
John D. Joannopoulos: Massachusetts Institute of Technology
Yoel Fink: Massachusetts Institute of Technology

Nature, 2004, vol. 431, issue 7010, 826-829

Abstract: Abstract The combination of conductors, semiconductors and insulators with well-defined geometries and at prescribed length scales, while forming intimate interfaces, is essential in most functional electronic and optoelectronic devices. These are typically produced using a variety of elaborate wafer-based processes, which allow for small features, but are restricted to planar geometries and limited coverage area1,2,3. In contrast, the technique of fibre drawing from a preformed reel or tube is simpler and yields extended lengths of highly uniform fibres with well-controlled geometries and good optical transport characteristics4. So far, this technique has been restricted to particular materials5,6,7 and larger features8,9,10,11,12. Here we report on the design, fabrication and characterization of fibres made of conducting, semiconducting and insulating materials in intimate contact and in a variety of geometries. We demonstrate that this approach can be used to construct a tunable fibre photodetector comprising an amorphous semiconductor core contacted by metallic microwires, and surrounded by a cylindrical-shell resonant optical cavity. Such a fibre is sensitive to illumination along its entire length (tens of meters), thus forming a photodetecting element of dimensionality one. We also construct a grid of such fibres that can identify the location of an illumination point. The advantage of this type of photodetector array is that it needs a number of elements of only order N, in contrast to the conventional order N2 for detector arrays made of photodetecting elements of dimensionality zero.

Date: 2004
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DOI: 10.1038/nature02937

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