Plasmonic color filters to decrease ambient light errors on active type dual band infrared image sensors

Hong-Kun Lyu; Young-Jin Park; Hui-Sup Cho; Sung-Hyun Jo; Hee-Ho Lee; Jang-Kyoo Shin

doi:10.1117/12.2063077

12 September 2014 Plasmonic color filters to decrease ambient light errors on active type dual band infrared image sensors

Hong-Kun Lyu, Young-Jin Park, Hui-Sup Cho, Sung-Hyun Jo, Hee-Ho Lee, Jang-Kyoo Shin

Author Affiliations +

Proceedings Volume 9160, Metamaterials: Fundamentals and Applications 2014; 91602Q (2014) https://doi.org/10.1117/12.2063077
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

In this paper, we proposed the plasmonic color filters to decrease ambient light errors on active type dual band infrared image sensors for a large-area multi-touch display system. Although the strong point of the touch display system in the area of education and exhibition there are some limits of the ambient light. When an unexpected ambient light incidents into the display the touch recognition system can make errors classifying the touch point in the unexpected ambient light area. We proposed a new touch recognition image sensor system to decrease the ambient light error and investigated the optical transmission properties of plasmonic color filters for IR image sensor. To find a proper structure of the plasmonic color filters we used a commercial computer simulation tool utilizing finite-difference time-domain (FDTD) method as several thicknesses and whit the cover passivation layer or not. Gold (Au) applied for the metal film and the dispersion information associated with was derived from the Lorentz-Drude model. We also described the mechanism applied the double band filter on the IR image sensors.

Citation Download Citation

Hong-Kun Lyu, Young-Jin Park, Hui-Sup Cho, Sung-Hyun Jo, Hee-Ho Lee, and Jang-Kyoo Shin "Plasmonic color filters to decrease ambient light errors on active type dual band infrared image sensors", Proc. SPIE 9160, Metamaterials: Fundamentals and Applications 2014, 91602Q (12 September 2014); https://doi.org/10.1117/12.2063077

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KEYWORDS

Image sensors

Metals

Infrared imaging

Optical filters

Plasmonics

Infrared sensors

Optical filtering

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