Nano Archive

Optical antenna effect in semiconducting nanowires

Chen, G and Wu, Jian and Lu, Qiujie and Gutierrez, H. R. and Xiong, Qihua and Pellen, M. E. and Petko, J. S. and Werner, D. H. and Eklund, P. C. (2008) Optical antenna effect in semiconducting nanowires. NANO LETTERS, 8 (5). pp. 1341-1346.

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We report on investigations of the interaction of light with nanoscale antennae made from crystalline GaP nanowires (NWs). Using Raman scattering, we have observed strong optical antenna effects which we identify with internal standing wave photon modes of the wire. The antenna effects were probed in individual NWs whose diameters are in the range 40 < d < 300 nm. The data and our calculations show that the nature of the backscattered light is critically dependent on the interplay between a photon confinement effect and bulk Raman scattering. At small diameter, d < 65 nm, the NWs are found to act like a nearly perfect dipole antenna and the bulk Raman selection rules are masked leading to a polarized scattering intensity function I-R similar to cos(4) theta. Underscoring the importance of this work is the realization that a fundamental understanding of the ``optical antenna effect'' in semiconducting NWs is essential to the analysis of all electro-optic effects in small diameter filaments.

Item Type:Article
Subjects:Physical Science > Nanoelectronics
Physical Science > Photonics
ID Code:1467
Deposited By:Farnush Anwar
Deposited On:12 Dec 2008 14:00
Last Modified:26 Mar 2009 12:17

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