Local surface plasmon enhanced polarization and internal quantum efficiency of deep ultraviolet emissions from AlGaN-based quantum wells

We report the enhancement of the polarization and internal quantum efficiency (IQE) of deep-UV LEDs by evaporating Al nanoparticles on the device surface to induce localized surface plasmons (LSPs). The deep-UV LEDs polarization is improved due to part of TM emission turns into TE emission through L...

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Bibliographic Details
Published in:Scientific reports 2017-05, Vol.7 (1), p.2358-5, Article 2358
Main Authors: Zhang, Cai, Tang, Ning, Shang, Liangliang, Fu, Lei, Wang, Weiying, Xu, Fujun, Wang, Xinqiang, Ge, Weikun, Shen, Bo
Format: Article
Language:English
Subjects:
639/624
639/624/1020/1085
Annealing
Efficiency
Emissions
Humanities and Social Sciences
Lasers
Light emitting diodes
Microscopy
multidisciplinary
Nanoparticles
Polarization
Radiation
Recombination
Science
Science (multidisciplinary)
Simulation
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Summary:We report the enhancement of the polarization and internal quantum efficiency (IQE) of deep-UV LEDs by evaporating Al nanoparticles on the device surface to induce localized surface plasmons (LSPs). The deep-UV LEDs polarization is improved due to part of TM emission turns into TE emission through LSPs coupling. The significantly enhanced IQE is attributed to LSPs coupling, which suppress the participation of delocalized and dissociated excitons to non-radiative recombination process.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-017-02590-7