Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/120575
Title: PLASMONIC ENHANCED DEVICES
Authors: YANG CHENGYUAN
Keywords: surface plasmon, confinement, waveguide, surface roughness, GaN LED, coupling
Issue Date: 23-Jan-2015
Citation: YANG CHENGYUAN (2015-01-23). PLASMONIC ENHANCED DEVICES. ScholarBank@NUS Repository.
Abstract: This thesis addresses some of the issues in the field of plasmonics such as the high optical loss associated with waveguiding and difficulty in integrating plasmonic coupling in a III-V LED. Through our research, we show ways of mitigating loss using metal assisted photonic mode guiding. This mode offers both long propagation and high confinement factor near its cut-off limit. We also introduce a surface smoothing technology using gas cluster ion beam irradiation to obtain high quality ultrathin, smooth silver structures for further reducing the optical loss of plasmonic devices. In addition, we demonstrate a way of introducing SPP coupling into an LED without having to modify the LED layer structure. This is a textured type of plasmonic LED structure that can provide a strong coupling even at relatively large distances. This design offers a simple approach to fabricate high speed LEDs for applications in visible light communications.
URI: http://scholarbank.nus.edu.sg/handle/10635/120575
Appears in Collections:Ph.D Theses (Open)

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