TY - JOUR
T1 - Nanoimprinted hybrid metal-semiconductor plasmonic multilayers with controlled surface nano architecture for applications in NIR detectors
AU - Khosroabadi, Akram A.
AU - Gangopadhyay, Palash
AU - Hernandez, Steven
AU - Kim, Kyungjo
AU - Peyghambarian, Nasser
AU - Norwood, Robert A.
N1 - Publisher Copyright:
© 2015 by the authors.
PY - 2015
Y1 - 2015
N2 - We present a proof of concept for tunable plasmon resonance frequencies in a core shell nano-architectured hybrid metal-semiconductor multilayer structure, with Ag as the active shell and ITO as the dielectric modulation media. Our method relies on the collective change in the dielectric function within the metal semiconductor interface to control the surface. Here we report fabrication and optical spectroscopy studies of large-area, nanostructured, hybrid silver and indium tin oxide (ITO) structures, with feature sizes below 100 nm and a controlled surface architecture. The optical and electrical properties of these core shell electrodes, including the surface plasmon frequency, can be tuned by suitably changing the order and thickness of the dielectric layers. By varying the dimensions of the nanopillars, the surface plasmon wavelength of the nanopillar Ag can be tuned from 650 to 690 nm. Adding layers of ITO to the structure further shifts the resonance wavelength toward the IR region and, depending on the sequence and thickness of the layers within the structure, we show that such structures can be applied in sensing devices including enhancing silicon as a photodetection material.
AB - We present a proof of concept for tunable plasmon resonance frequencies in a core shell nano-architectured hybrid metal-semiconductor multilayer structure, with Ag as the active shell and ITO as the dielectric modulation media. Our method relies on the collective change in the dielectric function within the metal semiconductor interface to control the surface. Here we report fabrication and optical spectroscopy studies of large-area, nanostructured, hybrid silver and indium tin oxide (ITO) structures, with feature sizes below 100 nm and a controlled surface architecture. The optical and electrical properties of these core shell electrodes, including the surface plasmon frequency, can be tuned by suitably changing the order and thickness of the dielectric layers. By varying the dimensions of the nanopillars, the surface plasmon wavelength of the nanopillar Ag can be tuned from 650 to 690 nm. Adding layers of ITO to the structure further shifts the resonance wavelength toward the IR region and, depending on the sequence and thickness of the layers within the structure, we show that such structures can be applied in sensing devices including enhancing silicon as a photodetection material.
KW - Infrared
KW - Metal semiconductor interface
KW - Photodetectors
KW - Silicon
KW - Surface plasmon
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U2 - 10.3390/ma8085028
DO - 10.3390/ma8085028
M3 - Article
AN - SCOPUS:84940055864
SN - 1996-1944
VL - 8
SP - 5028
EP - 5047
JO - Materials
JF - Materials
IS - 8
ER -