Patent Number: 7,088,884

Title: Apparatus and method employing multilayer thin-film stacks for spatially shifting light

Abstract: An apparatus and method for spatially shifting a light using a multilayer thin-film stack of at least two materials having unequal optical properties, such as indices of refraction and absorption coefficients. The apparatus has an input face for admitting the light into the apparatus and an impedance matching mechanism for maximizing the in-coupling of the light into the multilayer thin-film stack at a non-normal incidence. The non-normal incidence is sufficient to generate a spatial shift of the light in the multilayer thin-film stack as a function of at least one light parameter, such as wavelength and/or polarization of the light, thereby separating the light into light components. The spatial shift is achieved by any one or any combination of effects including superprism, turning point and energy confinement. These effects are achieved in the multilayer thin-film stack by appropriately engineering its layer sequence.

Inventors: Gerken; Martina (Mountain View, CA), Miller; David A. B. (Stanford, CA)

Assignee: The Board of Trustees of the Leland Stanford Junior University

International Classification: G02B 6/28 (20060101)

Expiration Date: 8/08/02018