Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published October 2011 | public
Journal Article

Compliant Metamaterials for Resonantly Enhanced Infrared Absorption Spectroscopy and Refractive Index Sensing


Metamaterials can be designed to operate at frequencies from the visible to the mid-IR, making these structures useful for both refractive index sensing and surface-enhanced infrared absorption spectroscopy. Here we investigate how the mechanical deformation of compliant metamaterials can be used to create new types of tunable sensing surfaces. For split ring resonator based metamaterials on polydimethylsiloxane we demonstrate refractive index sensing with figures of merit of up to 10.1. Given the tunability of the resonance of these structures through the infrared after fabrication, they are well suited for detection of the absorption signal of many typical vibrational modes. The results highlight the promise of postfabrication tunable sensors and the potential for integration.

Additional Information

© 2011 American Chemical Society. Received for review July 25, 2011 and accepted September 19, 2011. Publication Date (Web): September 19, 2011. We acknowledge financial support from the Air Force Office of Scientific Research under grant FA9550-09-1-0673 and the Air Force Research Laboratory under grant FA8650-09-D-5037. I.M.P. acknowledges the support of a National Science Foundation Graduate Fellowship. We acknowledge critical support and infrastructure provided for this work by the Kavli Nanoscience Institute at Caltech. The authors thank Professor George Rossman for access to his IR facilities and useful discussion, Joseph Beardslee for performing XPS studies of control Au films, Ryan Briggs, Derrick Chi, Melissa Melendes, and Christos Santis for help with reactive ion etching of the sample, and Vivian Ferry and Emily Warmann for useful discussions.

Additional details

August 19, 2023
October 24, 2023