Semiconductor chip that emits polarized radiation
First Claim
1. A radiation-emitting semiconductor chip comprising:
- a semiconductor body comprising an active zone configured to emit unpolarized radiation having a first radiation component of a first polarization and a second radiation component of a second polarization;
a grating structure comprising grating regions and configured to act as a waveplate or a polarization filter and bring about an increase in one radiation component relative to the other radiation component in radiation emitted by the semiconductor chip through a coupling-out side such that the semiconductor chip is configured to emit polarized radiation having a polarization of the amplified radiation component while the attenuated radiation component remains in the semiconductor chip;
an optical structure configured to convert the polarization of at least a part of the attenuated radiation component remaining in the semiconductor chip into the polarization of the amplified radiation component and comprising structured regions that are elongated depressions and that extend in a plane arranged parallel to a plane in which the grating structure extends, wherein the structured regions run transversely with respect to the grating regions and form with the latter an angle of greater than 0° and
less than 90°
; and
a reflective rear side situated opposite the coupling-out side, wherein the optical structure comprises a plurality of parallel running structured regions of a first orientation and a plurality of parallel running structured regions of a second orientation, the structured regions of a first orientation running transversely with respect to the structured regions of the second orientation.
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Accused Products
Abstract
A radiation emitting semiconductor chip is disclosed. Embodiments provide a semiconductor chip that emits radiation includes a semiconductor body having an active zone, which emits unpolarized radiation having a first radiation component of a first polarization and having a second radiation component of a second polarization. A lattice structure acts as a waveplate or polarization filter and causes an increase in one radiation component relative to the other radiation component in the radiation emitted by the semiconductor chip through an output side. Therefore, the semiconductor chip emits polarized radiation, which has the polarization of the amplified radiation component. The attenuated radiation component remains in the semiconductor chip an optical structure, which converts the polarization of at least part of the attenuated radiation component remaining in the semiconductor chip to the polarization of the amplified radiation component, and a reflective rear side opposite the output side.
22 Citations
19 Claims
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1. A radiation-emitting semiconductor chip comprising:
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a semiconductor body comprising an active zone configured to emit unpolarized radiation having a first radiation component of a first polarization and a second radiation component of a second polarization; a grating structure comprising grating regions and configured to act as a waveplate or a polarization filter and bring about an increase in one radiation component relative to the other radiation component in radiation emitted by the semiconductor chip through a coupling-out side such that the semiconductor chip is configured to emit polarized radiation having a polarization of the amplified radiation component while the attenuated radiation component remains in the semiconductor chip; an optical structure configured to convert the polarization of at least a part of the attenuated radiation component remaining in the semiconductor chip into the polarization of the amplified radiation component and comprising structured regions that are elongated depressions and that extend in a plane arranged parallel to a plane in which the grating structure extends, wherein the structured regions run transversely with respect to the grating regions and form with the latter an angle of greater than 0° and
less than 90°
; anda reflective rear side situated opposite the coupling-out side, wherein the optical structure comprises a plurality of parallel running structured regions of a first orientation and a plurality of parallel running structured regions of a second orientation, the structured regions of a first orientation running transversely with respect to the structured regions of the second orientation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification