Single Photon Source Solid Immersion Lens Design
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Solution Overview
Problem
Current single photon source devices face challenges in achieving a wide operating band and high light collection efficiency while being easy to manufacture and having low manufacturing costs, due to the complexity and inefficiency of existing light collection structures.
Innovation Solution
A single photon source device is designed with a reflection layer, insulating layer, and solid immersion lens portions, including a first and second solid immersion lens portion with specific materials and configurations, to enhance light collection and emission directionality, allowing for a wide operating band and high light collection efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional light collection structure is used, then manufacturing simplicity is improved, but light collection efficiency deteriorates
Solution Approach 1:
The patent implements a nested structure with an inner solid immersion lens (first SAIL) and an outer solid immersion lens (second SAIL), where the inner SAIL is positioned within the outer SAIL. This nested configuration enables sequential light collection and focusing, significantly improving light collection efficiency while maintaining compatibility with standard semiconductor manufacturing processes.
Solution Approach 2:
The patent transitions from planar light collection structures to three-dimensional solid immersion lenses with specific curvature radii and heights. The inner SAIL has a first curvature radius and the outer SAIL has a second curvature radius, creating a multi-dimensional optical path that enhances light collection efficiency without complicating the manufacturing process.
2Reliability
If a complex light collection structure is used, then light collection efficiency is improved, but device complexity increases
Solution Approach 1:
The light collection structure is segmented into two distinct solid immersion lenses: an inner SAIL and an outer SAIL, each with specific optical parameters. This segmentation allows each lens to perform a specialized function in the light collection process, achieving high efficiency while keeping each individual component relatively simple and manufacturable.
Solution Approach 2:
The patent optimizes specific parameters including the curvature radii (first and second curvature radii), heights, and refractive indices of the solid immersion lenses. By carefully controlling these parameters, the system achieves high light collection efficiency without requiring overly complex structures, as the performance is driven by precise parameter optimization rather than structural complexity.
3Adaptability or versatility
If a wide operating band is achieved, then adaptability is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent achieves a wide operating band by optimizing the refractive indices and curvature parameters of the solid immersion lenses. The inner SAIL and outer SAIL are designed with specific refractive index relationships and curvature ratios that broaden the operational wavelength range. This approach allows for wide adaptability while maintaining manufacturability through parameter optimization rather than requiring extremely tight dimensional tolerances.
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
The device achieves high light collection efficiency and a wide operating band, making it easier to manufacture and reducing costs, while maintaining high indistinguishability of single photons.
Implementation Method 1
a first solid immersion lens portion disposed on the insulating layer to surround the single emitter; and a second solid immersion lens portion disposed on the insulating layer to surround the first solid immersion lens portion
Implementation Method 2
a reflection layer; an insulating layer disposed on the reflection layer
Data Source
AI summary
A single photon source device is proposed. The device may include a reflection layer, an insulating layer disposed on the reflection layer, and a single emitter configured to emit a single photon. The device may also include a first solid immersion lens portion disposed on the insulating layer to surround the single emitter, and a second solid immersion lens portion disposed on the insulating layer to surround the first solid immersion lens portion.