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Science 24 August 2001:
Vol. 293. no. 5534, pp. 1455 - 1457
DOI: 10.1126/science.1062340
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Reports

Highly Polarized Photoluminescence and Photodetection from Single Indium Phosphide Nanowires

Jianfang Wang,1* Mark S. Gudiksen,1* Xiangfeng Duan,1 Yi Cui,1 Charles M. Lieber12dagger

We have characterized the fundamental photoluminescence (PL) properties of individual, isolated indium phosphide (InP) nanowires to define their potential for optoelectronics. Polarization-sensitive measurements reveal a striking anisotropy in the PL intensity recorded parallel and perpendicular to the long axis of a nanowire. The order-of-magnitude polarization anisotropy was quantitatively explained in terms of the large dielectric contrast between these free-standing nanowires and surrounding environment, as opposed to quantum confinement effects. This intrinsic anisotropy was used to create polarization-sensitive nanoscale photodetectors that may prove useful in integrated photonic circuits, optical switches and interconnects, near-field imaging, and high-resolution detectors.

1 Department of Chemistry and Chemical Biology,
2 Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
*   These authors contributed equally to this work.

dagger    To whom correspondence should be addressed. E-mail: cml{at}cmliris.harvard.edu

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