Ultrafast Nonlinear Optical Spectroscopy of a Dual-Band Negative Index Metamaterial All-Optical Switching Device
Abstract
We study the nonlinear optical response of a fishnet structuremetamaterial all-optical switching device that exhibits two near-infrared negative-index resonances. We study and compare the nonlinear optical response at both resonances and identify transient spectral features associated with the negative index resonance. We see a significantly stronger response at the longer wavelength resonance, but identical temporal dynamics at both resonances, providing insight into separately engineering the switching time and switching ratio of such a fishnet structure metamaterial all-optical switch. We also numerically reproduce the nonlinear behavior of our device using the Drude conductivity model and a finite integration technique over wide spectral and pump fluence ranges. Thereby, we show that beyond the linear properties of the device, the magnitude of the pump-probe response is completely described by only two material parameters. These results provide insight into engineering various aspects of the nonlinear response of fishnet structure metamaterials.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 2011
- Accession Number
- ADA560571
Entities
People
- Antoinette J. Taylor
- Keshav M Dani
- Prashanth C. Upadhya
- Rohit P Prasankumar
- Steven Brueck
- Zahyun Ku
Organizations
- University of New Mexico