Elliptical Nanowire Optics
Nanostructured materials modulate the phase of optical waves traveling through them. When the nanostructure geometry is anisotropic, different polarizations of light interact differently, an effect called form birefringence. Recently, we demonstrated that elliptical cross-section nanowires are an extremely high resolution method to locally control form birefringence.
Using form birefringence, two optical functions can be encoded into the same physical aperture. This can be used to tune the properties of imaging systems.
E. Schonbrun, K. Seo, and K. B. Crozier, "Reconfigurable imaging systems using elliptical nanowires," Nano Lett., 11, 4299-4303 (2011).
E. Schonbrun, "Nanowire lenses can perform two functions at once," SPIE Newsroom, 6 January 2012.