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US 2011/0085238 A1Published application
Optical element and optical apparatus
AssigneeHitachi, Ltd.
InventorsHiroyuki MINEMURA, Yumiko ANZAI, Hideharu MIKAMI
Life of this patent
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Abstract
The present invention provides a small and inexpensive optical element that integrates a reflecting mirror and a wave plate function. A reflecting wave plate is configured by arranging a periodic metal comb-like structure whose pitch is equal to or below a wavelength and a mirror structure with a distance equal to or below a coherence length.
Claims9
An optical element comprising:
- a comb-like structure having a pitch equal to or below a wavelength of incident light and having conductivity for the wavelength of the light;
- and
- a mirror structure that reflects the light,
- wherein a distance between the comb-like metal structure and the mirror structure of the light is equal to or below a coherence length and a phase difference of reflected light is produced between a first polarization direction component of the light and a second polarization direction component orthogonal thereto.
1 more element
An optical apparatus mounted with an optical element, comprising:
- a comb-like metal structure having a pitch equal to or below a wavelength of incident light and having conductivity for the wavelength of the light;
- and
- a mirror structure that reflects the light, a distance between the comb-like structure and the mirror structure of the light being equal to or below a coherence length and a phase difference of reflected light is produced between a first polarization direction component of the light and a second polarization direction component orthogonal thereto,
- wherein the optical apparatus has a function of performing at least one of waveguiding, modulation and detection of light.
1 more element
An optical element comprising:
- a comb-like structure having a pitch equal to or below a wavelength of an incident radio wave and having conductivity for the wavelength of the radio wave;
- and
- a mirror structure that reflects the radio wave,
- wherein a distance between the comb-like metal structure and the mirror structure of the radio wave is equal to or below a coherence length and a phase difference of reflected light is produced between a first polarization direction component of the radio wave and a second polarization direction component orthogonal thereto.
1 more element
Dependencies are inferred from the claim text.