Event Details
Engineering in the Optimization of Resolution of Nanohole Arrays in Metal Films for Refractive Index Sensing
Presenter: Gabriela Andrea Cervantes Tellez
Supervisor: Dr. Reuven Gordon
Date: Tue, July 3, 2012
Time: 14:00:00 - 00:00:00
Place: EOW 430
ABSTRACT
SUMMARY
Surface plasmon resonance is considered one of the most promising label free optical techniques. The use of nanohole arrays in a metal film allow for extraordinary transmission and has been motivated their application as biosensors. We explored the design parameters for the optimization of sensitivity and resolution of nanohole arrays for refractive index with modifications to the hole array parameters and by reducing the noise of the system. A systematic study of the influence of the nanohole array periodicity, diameter, and gold thickness is provided. Focused ion beam was used to fabricate the nanohole arrays. A microfluidic device with a set of embedded nanohole arrays was developed and successfully demonstrated to measure the sensing characteristics. Due to the collinear microscope geometry, the potential for multiplexing of nanohole arrays and improved optofluidic functionality, these results are encouraging for future detection of chemical and biological species.