Polarized and diameter-dependent Raman scattering from individual aluminum nitride nanowires: The antenna and cavity effects
2012 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 101, no 12, 121902- p.Article in journal (Refereed) Published
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.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-85091DOI: 10.1063/1.4753798ISI: 000309425700020OAI: oai:DiVA.org:liu-85091DiVA: diva2:564618
Funding Agencies|Ministry of Education||National Science Council||Academia Sinica in Taiwan||US AFOSR-AOARD||2012-11-022012-11-022012-11-07