Modulating Surface Plasmon Resonance of Periodic Gold Structure to Enhance Optical Properties of P3HT:PMMA Thin Film
Date Issued
2010
Date
2010
Author(s)
Chou, Yi
Abstract
Traditional semiconductor fabrication processes have faced enormous challenging when the electronic devices become nanoscaled. Because of the high resolution and mask-free fabrication, E-beam lithography has become one of the most
popular in next generation fabrications. Therefore, the research of high resolution, thermal stable, low cost and muti-function e-beam resist are necessary. This research have fabricated poly-(3- hexylthiophene), polymethylmethacrylate (P3HT:PMMA) hybrid film with periodic structure which is a photoluminence e-beam resist with good thermal stability and high resolution. After thermal evaporate a gold film to cover the surface, we can modulating the surface plasmon resonance of periodic structure to enhance the optical properties of P3HT:PMMA/Au hybrid materials.
We compared the difference between extinction measurement and confocal mapping to discuss the properties of surface plasmon resonance. The resonance effect is increased with increasing hole diameter. The difference between patterned and non-patterned area could identified easily by Raman mapping images, moreover, the intensity of Raman spectra of patterned P3HT:PMMA/Au film has been increased about 500 times compared with P3HT:PMMA film.
In addition, we alter the spin speed of spin coater to modulate the thickness of P3HT:PMMA and discuss the influence on optical properties. The peak of extinction
spectra is red shifted with increasing the thickness of P3HT:PMMA. Our experimental data are consistent with theoretical FDTD calculation.
Subjects
Surface plasmon resonance
Raman scattering spectrum
E-beam lithography
poly-(3- hexylthiophene)
polymethylmethacrylate
Type
thesis
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