Tunable infrared reflectance by phonon modulation

DWPI Title: Method of tuning infrared reflectance of ferroelectric material used in semiconductors, involves providing ferroelectric material layer comprising domain walls on substrate and applying electric field for causing shift in wavelength
Abstract: The present invention pertains to the use of mobile coherent interfaces in a ferroelectric material to interact with optical phonons and, ultimately, to affect the material's optical properties. In altering the optical phonon properties, the optical properties of the ferroelectric material in the spectral range near-to the phonon mode frequency can dramatically change. This can result in a facile means to change to the optical response of the ferroelectric material in the infrared.
Use: Method of tuning infrared reflectance of ferroelectric material used in semiconductors.
Advantage: The method efficiently tunes infrared reflectance of ferroelectric material by varying the optical phonons in the ferroelectric materials. The method enables high frequency dielectric properties and refractive index, and surface plasmon polariton at interfaces of the material with minimal losses.
Novelty: Method of tuning an infrared reflectance of a ferroelectric material involves providing at least one ferroelectric layer of a ferroelectric material on a substrate, in which the ferroelectric layer comprises several ferroelectric domain walls that are mobile under an applied electric field, and applying an electric field across the ferroelectric layer for altering the volumetric concentration of the ferroelastic domain walls and causing a shift in the wavelength of a minimum in the infrared reflectance.
Filed: 9/21/2017
Application Number: US15711122A
Tech ID: SD 12768.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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