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Polarized and diameter-dependent Raman scattering from individual aluminum nitride nanowires: The antenna and cavity effects
National Cheng Kung University, Taiwan National Cheng Kung University, Taiwan .
National Taiwan University, Taiwan .
National Taiwan University, Taiwan .
National Taiwan University, Taiwan .
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2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 101, no 12, 121902- p.Article in journal (Refereed) Published
Abstract [en]

Raman scattering of individual aluminum nitride (AlN) nanowires is investigated systematically. The axial direction of single nanowire can be rapidly verified by polarized Raman scattering. The angular dependencies of E-2(high) mode show strongly anisotropic behavior in smaller nanowires, which results from optical antenna effect. Raman enhancement (RE) per unit volume of E-2(high) increases with decreasing diameter of nanowires. Compared to the thin film, similar to 200-fold increase of RE is observed in AlN nanowires having diameter less than 50 nm, which is far beyond the quantum confinement regime. Such a large RE can be attributed to the effects of resonant cavity and stimulated Raman scattering.

Place, publisher, year, edition, pages
American Institute of Physics (AIP) , 2012. Vol. 101, no 12, 121902- p.
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-85091DOI: 10.1063/1.4753798ISI: 000309425700020OAI: diva2:564618

Funding Agencies|Ministry of Education||National Science Council||Academia Sinica in Taiwan||US AFOSR-AOARD||

Available from: 2012-11-02 Created: 2012-11-02 Last updated: 2012-11-07

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Lundskog, AndersForsberg, UrbanJanzén, Erik
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