Surface-plasmon-enhanced visible light emission of ZnO/Ag grating structures

Minji Gwon; Eunsongyi Lee; Dong-Wook Kim; Ki-Ju Yee

doi:10.1117/12.892860

21 September 2011 Surface-plasmon-enhanced visible light emission of ZnO/Ag grating structures

Minji Gwon, Eunsongyi Lee, Dong-Wook Kim, Ki-Ju Yee

Proceedings Volume 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX; 80962C (2011) https://doi.org/10.1117/12.892860
Event: SPIE NanoScience + Engineering, 2011, San Diego, California, United States

Abstract

We investigated the optical properties of ZnO/Ag grating structures, with the periods of 1000 and 1400 nm, fabricated by sputtering and nanoimprint lithography. The grating structures exhibited multiple peak features in visible-range photoluminescence (PL) spectra. Whereas a ZnO/Ag planar thin film showed two broad PL peaks in UV and visible region. Moreover, the PL intensity of the periodic structures was ~100 times larger than that of the planar counterpart. Several reflectance dips in the visible range were seen only in the grating structures, which could be caused by photoninduced surface plasmon polariton (SPP) excitation via the grating coupling. The PL peaks well matched with the reflectance dips. This represented that the PL enhancement should be originated from the SPP excitation. The finitedifference time-domain simulations also supported the plasmonic effects in the periodic structures.

Citation Download Citation

Minji Gwon, Eunsongyi Lee, Dong-Wook Kim, and Ki-Ju Yee "Surface-plasmon-enhanced visible light emission of ZnO/Ag grating structures", Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80962C (21 September 2011); https://doi.org/10.1117/12.892860

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