Abstract:
:We report localised-surface-plasmon (LSP) enhanced deep-ultraviolet light-emitting diodes (deep-UV LEDs) using Al nanoparticles for LSP coupling. Polygonal Al nanoparticles were fabricated on the top surfaces of the deep-UV LEDs using the oblique-angle deposition method. Both the top- and bottom-emission electroluminescence of deep-UV LEDs with 279 nm multiple-quantum-well emissions can be effectively enhanced by the coupling with the LSP generated in the Al nanoparticles. The primary bottom-emission wavelength is longer than the primary top-emission wavelength. This difference in wavelength can be attributed to the substrate-induced Fano resonance effect. For resonance modes with shorter wavelengths, the radiation fraction directed back into the LEDs is largest in the direction that is nearly parallel to the surface of the device and results in total reflection and re-absorption in the LEDs.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Huang K,Gao N,Wang C,Chen X,Li J,Li S,Yang X,Kang Jdoi
10.1038/srep04380subject
Has Abstractpub_date
2014-03-14 00:00:00pages
4380issn
2045-2322pii
srep04380journal_volume
4pub_type
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