Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1784505 | Infrared Physics & Technology | 2012 | 4 Pages |
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.
► We observed 100% increases in MWIR LED power by nano-plasmon layer. ► We use gold metal layer of 20 nm thickness. ► Interband cascade LED device emit light in 3–5 μm range. ► Device voltage drop decreases with nano-plasmon layer.