Nano-plasmon enhancement effect on MWIR light emitting diode performance |
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Authors: | Naresh C Das |
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Institution: | Microphotonics Branch, Army Research Laboratory, 2800 Powder Mill Rd., Adelphi, MD 20783, United States |
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Abstract: | We observed a significant increase in electro luminescence from GaSb based mid-wave infrared (MWIR) LED device through coupling with localized surface plasmon of a single layer Au nano-particles. We fabricated an interband cascade (IC) LED device with nine cascade active/injection layers with InAs/Ga1−x InxSb/InAs quantum well (QW) active region. Thin Au plasmon layer of 20 nm thickness is deposited on top anode electrode by e-beam technique, which resulted in 100% increase in light output for 50 μm square mesa device. We also observed a reduction in the device turn on voltage and increase in the apparent black body emission temperature due to nano-structure surface plasmon layer. |
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Keywords: | Infrared LED Surface plasmon LED efficiency Quantum cascade device |
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