Embedded Optical Resonators for Stronger Quantum Transducer Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current quantum transducers face challenges in efficiently converting microwave photons to infrared photons due to the difficulty in confining the microwave field, which affects the transduction efficiency, as the energy of microwave photons is less than the thermal background energy at room temperature, making room-temperature quantum information links at microwave frequencies challenging.
Innovation Solution
The proposed solution involves quantum transducers with microstrip, co-planar, and twinstrip architectures that include optical resonators positioned within a dielectric substrate, allowing for electro-optic coupling between microwave and optical resonators, thereby confining the microwave mode within the substrate and enhancing the coupling strength, which improves transduction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If quantum transducers use conventional microwave resonator designs, then the structure is simpler, but the microwave field confinement is insufficient, leading to lower transduction efficiency
Solution Approach 1:
The patent embeds an optical resonator within the dielectric substrate of the microwave resonator, creating a nested structure where the optical resonator is positioned inside the microwave resonator's electromagnetic field region. This nesting allows the optical resonator to be coupled to the microwave field while maintaining compact integration, thereby improving transduction efficiency without requiring separate, complex coupling structures.
Solution Approach 2:
The patent positions the optical resonator within the dielectric substrate, utilizing the vertical dimension (z-direction) to embed the optical resonator beneath the microwave resonator elements. This dimensional arrangement enables strong coupling between microwave and optical fields by placing the optical resonator in the region of highest microwave field intensity, improving transduction efficiency while maintaining a planar, manufacturable structure.
2Strength
If the microwave mode volume is not minimized, then the device fabrication is easier, but the coupling strength between microwave and optical resonators is reduced
Solution Approach 1:
The patent creates a localized region of high microwave field intensity by designing the microwave resonator with specific geometric features that concentrate the electromagnetic field in a small volume. The optical resonator is then positioned precisely within this high-field region, ensuring that the coupling occurs where the microwave field is strongest. This local concentration of field intensity maximizes coupling strength without requiring complex fabrication processes.
Solution Approach 2:
The dielectric substrate serves as an intermediary medium that supports both the microwave resonator structure and the embedded optical resonator. The dielectric material provides a platform for confining the microwave field while also allowing the optical resonator to be embedded and coupled to the microwave mode. This intermediary structure enables strong coupling while maintaining manufacturability through standard semiconductor fabrication processes.
3Reliability
If optical resonators are not embedded within the dielectric substrate, then the fabrication process is simpler, but the microwave field confinement is weaker
Solution Approach 1:
The patent merges the microwave resonator and optical resonator into a single integrated structure by embedding the optical resonator within the dielectric substrate of the microwave resonator. This merging creates a unified device where both resonators share the same physical platform and are coupled through their overlapping electromagnetic fields, achieving strong microwave field confinement and efficient transduction in a single integrated component.
Solution Approach 2:
The patent utilizes a composite structure consisting of superconducting materials for the microwave resonator elements and dielectric materials for the substrate and cladding layers. This composite material approach enables the microwave resonator to achieve low loss and high quality factor while the dielectric substrate provides mechanical support and electromagnetic confinement. The integration of different material properties enhances overall device performance without requiring complex fabrication processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach increases the transduction efficiency by minimizing the microwave mode volume, enabling effective conversion of photons between the microwave and infrared domains, facilitating long-distance quantum information transfer without attenuation or interference.
Implementation Method 1
allowing for electro-optic coupling between microwave and optical resonators
Implementation Method 2
confining the microwave mode within the substrate and enhancing the coupling strength
Data Source
AI summary
Techniques regarding quantum transducers are provided. For example, one or more embodiments described herein can include an apparatus that can include a superconducting microwave resonator having a microstrip architecture that includes a dielectric layer positioned between a superconducting waveguide and a ground plane. The apparatus can also include an optical resonator positioned within the dielectric layer.