Accepted manuscript
Stability of optimal-wave-front-sample coupling under sample translation and rotation
Physical review. A, Atomic, molecular, and optical physics, Vol.91(6)
06/03/2015
Abstract
The method of wavefront shaping to control optical properties of opaque media is a promising technique for authentication applications. One of the main challenges of this technique is the sensitivity of the wavefront-sample coupling to translation and/or rotation. To better understand how translation and rotation affect the wavefront sample coupling we perform experiments in which we first optimize reflection from an opaque surface-to obtain an optimal wavefront-and then translate or rotate the surface and measure the new reflected intensity pattern. By using the correlation between the optimized and translated or rotated patterns we determine how sensitive the wavefront-sample coupling is. These experiments are performed for different spatial-light-modulator (SLM) bin sizes, beam-spot sizes, and nanoparticle concentrations. We find that all three parameters affect the different positional changes, implying that an optimization scheme can be used to maximize the stability of the wavefront-sample coupling. We also develop a model to simulate sample translation or rotation and its effect on the coupling stability, with the simulation results being qualitatively consistent with experiment.
Metrics
Details
- Title
- Stability of optimal-wave-front-sample coupling under sample translation and rotation
- Creators
- Benjamin R. Anderson - Washington State UniversityRay Gunawidjaja - Washington State UniversityHergen Eilers - Washington State University Spokane
- Publication Details
- Physical review. A, Atomic, molecular, and optical physics, Vol.91(6)
- Academic Unit
- Institute for Shock Physics
- Publisher
- Amer Physical Soc
- Number of pages
- 13
- Grant note
- HDTRA1-13-1-0050 / Defense Threat Reduction Agency; United States Department of Defense
- Identifiers
- 99900876941401842
- Language
- English
- Resource Type
- Accepted manuscript