dc.contributor.advisor | Cheng, Xing | |
dc.creator | Jiang, Youwei | |
dc.date.accessioned | 2015-01-09T20:49:55Z | |
dc.date.available | 2016-05-01T05:30:59Z | |
dc.date.created | 2014-05 | |
dc.date.issued | 2014-04-28 | |
dc.date.submitted | May 2014 | |
dc.identifier.uri | https://hdl.handle.net/1969.1/152784 | |
dc.description.abstract | Nanophotonics have drawn huge attention in recent years in various applications. Surface sensing technique, including surface-enhanced Raman spectroscopy (SERS), is an important topic of nanophotonics and has been widely investigated. The capability of SERS-active device depends on two main factors: good reproducibility and high enhancement factor. Ordered metallic nanostructures with high resolution are usually preferred for SERS application. Nanoimprint lithography can provide a low-cost and high resolution fabrication technique for SERS-active devices.
The objective of this research is to explore the application of nanoimprint lithography in SERS-active devices. This work begins with two issues of nanoimprint lithography: mold fabrication and throughput improvement. The potential of nanoimprint lithography depends on reliable mold fabrication. Two techniques are investigated, which are polyelectrolyte electrostatic self-assembly and controlled polymer reflow. Based on the observation of exceptional thermal stability of entangled polymer, step-and-repeat thermal nanoimprint lithography is developed. This technique significantly improves the throughput and enables the large scale application of thermal nanoimprint.
Ordered metallic nanostructures have been widely used as SERS-active substrates. In order to achieve high enhancement, extremely high resolution is needed, which can be limited by lithography technique. In this work, SERS-active devices based on gap surface plasmon polaritons are fabricated by nanoimprint lithography. 17 times more enhancement is achieved compared with conventional SERS-active devices on the same structure dimensions. This technique opens up possibilities of single molecule detection in the future. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.subject | nanoimprint | en |
dc.subject | nanophotonics | en |
dc.subject | SERS | en |
dc.subject | step-and-repeat | en |
dc.title | High Resolution Nanoimprint for Nanophotonics | en |
dc.type | Thesis | en |
thesis.degree.department | Electrical and Computer Engineering | en |
thesis.degree.discipline | Electrical Engineering | en |
thesis.degree.grantor | Texas A & M University | en |
thesis.degree.name | Doctor of Philosophy | en |
thesis.degree.level | Doctoral | en |
dc.contributor.committeeMember | Shao, Lin | |
dc.contributor.committeeMember | Zou, Jun | |
dc.contributor.committeeMember | Entesari, Kamran | |
dc.type.material | text | en |
dc.date.updated | 2015-01-09T20:49:55Z | |
local.embargo.terms | 2016-05-01 | |
local.etdauthor.orcid | 0000-0001-8358-6171 | |