Surface plasmon-assisted terahertz imaging array

Park, Kyoung Youl; Meierbachtol, Collin S.; Wiwatcharagoses, Nophadon; Chahal, Premjeet

doi:10.1109/ectc.2012.6249089

Cited by 5 publications

(1 citation statement)

References 24 publications

(32 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, surface plasmons (SPs), collective oscillations of free electrons coupled with an electromagnetic wave on a metal/dielectric interface, have been widely used for enhanced absorption from ultraviolet (UV) [9] up to mid-infrared (MIR) [10] wavelengths. Localization property of surface plasmons at sub-wavelength dimensions makes them very attractive for absorption enhancement purposes, especially in imaging technologies due to decreasing pixel size [11,12].…”

Section: Introductionmentioning

confidence: 99%

A plasmonically enhanced pixel structure for uncooled microbolometer detectors

et al. 2013

View full text Add to dashboard Cite

This paper introduces a method of broadband absorption enhancement that can be integrated with the conventional suspended microbolometer process with no significant additional cost. The premise of this study is that electric field can be enhanced throughout the structural layer of the microbolometer, resulting in an increase in the absorption of the infrared radiation in the long wave infrared window. A concentric double C-shaped plasmonic geometry is simulated using the FDTD method, and this geometry is fabricated on suspended pixel arrays. Simulation results and FTIR measurements are in good agreement indicating a broadband absorption enhancement in the 8 μm - 12 μm range for LWIR applications. The enhancement is attained using metallic geometries embedded in the structural layer of the suspended microbridge, where the metallic-dielectric interface increases the average absorption of a 35 μm pixel from 67.6% to 80.1%. © 2013 SPIE

show abstract