Patent ID: 6954309

Claim:
An optical component for frequency-selective reflection in the gigahertz and terahertz frequency range and wave transparency, comprising: at least one first layer ( 1 , 3 , 5 ) of a first material (m 1 ), which is optically transparent for electromagnetic radiation of a reference frequency (f) between 5 gigahertz (GHz) and 2 terahertz (THz), with a first refractive index (n 1 ) and an optical thickness of approximately one quarter of the wavelength (λ) of the electromagnetic radiation of the reference frequency (f) in the first material (m 1 ), underneath the first layer ( 1 ), at least one second layer ( 2 ) of a second material (m 2 ), which is optically transparent for the electromagnetic radiation of the frequency (f), with a second refractive index (n 2 ) and an optical thickness of approximately one quarter or half of the wavelength (λ) of the electromagnetic radiation of the reference frequency (f) in the second material (m 2 ), the first refractive index (n 1 ) and the second refractive index (n 2 ) being different.