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http://dx.doi.org/10.5369/JSST.2019.28.4.262

Interaction Between Surface Plasmon Resonance and Inter-band Transition in Gold Thin Film  

Kang, Daekyung (Department of Electrical Engineering, Kyungpook National University)
Kumar, Marredi Bharath (Department of Electrical Engineering, Kyungpook National University)
Adeshina, Mohammad Awwal (Department of Electrical Engineering, Kyungpook National University)
Choi, Bongjun (Electro-optical Systems Team 2, Hanwha systems)
Park, Jonghoo (Department of Electrical Engineering, Kyungpook National University)
Publication Information
Journal of Sensor Science and Technology / v.28, no.4, 2019 , pp. 262-265 More about this Journal
Abstract
The effect of inter-band transition on surface plasmon resonance in gold thin film was investigated. We induced localized inter-band transition in the film by using incident light on its surface from a green laser (532 nm) source, and the surface plasmon resonance for inter-band transition was investigated at different wavelengths. It was determined that the reflectivity of blue light (450 nm) was significantly reduced in the region where the green laser was incident. We demonstrated that this decrease is mainly due to the coupling between the blue light and the surface plasmon resonance of excited electrons in higher energy states, based on experimental results for the incident and polarization angle-dependent reflectivity of the blue light.
Keywords
Surface plasmon resonance; Gold thin film; Inter-band transition;
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