Monolithically integrated photon pair source and methods for its fabrication
DE102025109998B3Undetermined Publication Date: 2026-07-30FERDINAND BRAUN INSTITUT GGMBH LEIBNIZ INSTITUT FUR HOCHSTFREQUENZTECHNIK +1
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Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- FERDINAND BRAUN INSTITUT GGMBH LEIBNIZ INSTITUT FUR HOCHSTFREQUENZTECHNIK
- Filing Date
- 2025-03-14
- Publication Date
- 2026-07-30
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Abstract
The present invention relates to a monolithically integrated photon pair source, in particular a monolithically constructed waveguide stack configured for providing quantum mechanically entangled photon pairs by means of parametric fluorescence (Spontaneous Parametric Down Conversion, SPDC). A monolithically integrated photon pair source according to the invention comprises a dielectric waveguide, DWL, (10); and a Bragg reflection waveguide, BRWL, (30), configured for providing quantum mechanically entangled photon pairs by means of parametric fluorescence, wherein the BRWL (30) is arranged below the DWL (10) and these interact with each other in a common coupling section (CA) such that pump radiation guided in the DWL (10) is coupled into the BRWL (30).
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