Optical filter and optical spectrometer including the same
AssigneeSamsung Electronics Co., Ltd.
InventorsWeonkyu Koh, Junghyun Park
Life of this patent
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Abstract
An optical spectrometer may include an optical filter including a plurality of filter layers formed on a base substrate. The filter layers may include a perovskite material and at least two filter layers among the plurality of filter layers may include perovskite materials having different composition ratios from each other. The filter layers may show respective band-gap characteristics in different optical wavelength ranges from each other, in an optical absorption spectrum and/or an optical transmission spectrum.
Claims12
An optical filter comprising:
- a base substrate comprising a transparent material;
- and
- a filter layer on the base substrate,
- wherein the filter layer comprises a perovskite material,
- wherein the filter layer comprises a plurality of filter layers, and at least two of the plurality of filter layers are formed of perovskite materials having different composition ratios from each other, and at least two of the plurality of filter layers is spaced apart from each other in a direction perpendicular to a direction of thickness of the base substrate, and
- wherein the at least two of the plurality of filter layers have different optical absorption rates or different optical transmittances from each other.
An optical spectrometer comprising:
- a light source;
- an optical filter on which a first optical signal irradiated from the light source is incident, directly or via an object;
- and
- a photodetector on which a second optical signal passing through the optical filter is incident,
- wherein the optical filter comprises a filter layer, the filter layer comprising a perovskite material,
- wherein the filter layer comprises a plurality of filter layers, and at least two of the plurality of filter layers are formed of perovskite materials having different composition ratios from each other, and at least two of the plurality of filter layers is spaced apart from each other in a direction perpendicular to a direction of thickness of a base substrate of the optical filter, and
- wherein the at least two of the plurality of filter layers have different optical absorption rates or different optical transmittances from each other.
An optical spectrometer comprising:
- a light source;
- and
- an integrated body of an optical filter and a photodetector on which a first optical signal irradiated from the light source is incident, either directly or via an object,
- wherein the integrated body of the optical filter and the photodetector comprises a p-n junction structure, the p-n junction structure comprising an n-type layer formed on a bottom structure and a p-type layer formed on the n-type layer,
- wherein the p-n junction structure comprises a plurality of p-n junction structures, and at least two of the plurality of p-n junction structures is spaced apart from each other in a direction perpendicular to a direction of thickness of a base substrate of the optical filter,
- wherein p-type layers of at least two of the plurality of p-n junction structures include perovskite materials having different composition ratios from each other,
- wherein the at least two of the plurality of p-n junction structures have different optical absorption rates or different optical transmittances from each other.
Dependencies are inferred from the claim text.