Polarized ultraviolet emitters with Al wire-grid polarizers fabricated by solvent-assisted nanotransfer process

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Polarized ultraviolet (UV) emitters are essential for various applications, such as photoalignment devices for liquid crystals, high-resolution imaging devices, highly sensitive sensors, and steppers. To increase the high polarization ratio (PR) of a UV emitter, the grating period should be decreased than that of the visible emitter. However, the fabrication of the short period grating directly on UV emitters is still limited. In this study, we demonstrate that 200, 100, and 50 nm period aluminum (Al)-based wire-grid polarizers (WGPs) can be fabricated directly on UV emitters by a solvent-assisted nanotransfer process. The UV emitter with a grating period of 100 nm shows a PR of 84%, and an electroluminescence efficiency that is 22.5% and 48% higher than those of UV emitters with 50 nm and 200 nm period WGPs, respectively, due to the increased photon extraction efficiency (PEE). The higher PEE is attributed to the optical cavity property of the Al metal reflector with low light loss and the surface plasmon effect of the Al grating layer.
Publisher
IOP PUBLISHING LTD
Issue Date
2020-01
Language
English
Article Type
Article
Citation

NANOTECHNOLOGY, v.31, no.4

ISSN
0957-4484
DOI
10.1088/1361-6528/ab4c16
URI
http://hdl.handle.net/10203/268443
Appears in Collection
MS-Journal Papers(저널논문)
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