Nanometer-Scale Apertures in Optical Waveguides for Multiplexed Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical systems for multiplexed analyses are complex, costly, and space-consuming, and face challenges in increasing multiplex without degrading signal-to-noise ratios or causing inter-reaction cross-talk, especially in sensitive environments.
Innovation Solution
The use of optical waveguides with nanometer-scale apertures and local field enhancement elements, such as high dielectric materials or metals, to enhance illumination and detection efficiency, allowing for simplified optical paths and non-spectral signal discrimination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional optical systems are used for multiplexed analyses, then detection capability is achieved, but system complexity increases and space requirements expand
Solution Approach 1:
The patent extracts the illumination function from a complex external optical system and integrates it directly into the substrate through waveguides. The reaction chambers are positioned directly on the substrate surface, eliminating the need for complex optical trains with multiple lenses, mirrors, and filters. This extraction of the illumination function to the substrate level simplifies the overall system architecture while maintaining detection capability.
Solution Approach 2:
The patent transitions from traditional three-dimensional optical path manipulation (using lenses and mirrors in free space) to a two-dimensional planar integration approach. Waveguides are embedded in the substrate plane, and reaction chambers are arranged on the substrate surface, allowing illumination to occur in the plane of the substrate rather than requiring complex spatial manipulation in three dimensions.
2Productivity
If multiplex factor is increased to enhance throughput, then productivity improves, but signal-to-noise ratio deteriorates and cross-talk increases
Solution Approach 1:
The substrate is divided into multiple independent reaction chambers, each capable of performing separate analyses simultaneously. Each chamber is independently illuminated by waveguides and detected by corresponding detectors, creating spatially separated analysis zones. This segmentation allows high multiplexing (increased throughput) while maintaining signal-to-noise ratio because each reaction is isolated in its own chamber, preventing cross-contamination and cross-talk between reactions.
3Ease of operation
If conventional optical trains are used for light manipulation, then light can be directed and filtered, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple optical functions (illumination, light guiding, reaction containment, and detection) into a single integrated substrate structure. The substrate incorporates waveguides for light delivery, reaction chambers for sample analysis, and detector arrays for signal collection, all in one monolithic component. This consolidation eliminates the need for separate optical components and their associated alignment and assembly procedures, significantly reducing manufacturing complexity and cost while maintaining full light manipulation capability.
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 reduces system complexity, lowers costs, and enhances throughput while maintaining high sensitivity and reducing cross-talk, enabling efficient multiplexed analysis of reactions like nucleic acid sequencing.
Implementation Method 1
a plurality of nanometer-scale apertures disposed in the metallic layer in sufficient proximity to the optical waveguide to be illuminated by an evanescent field emanating from the waveguide when optical energy is passed through the optical core
Implementation Method 2
a plurality of local field enhancement elements associated with the plurality of apertures
Data Source
AI summary
Optical analytical devices and their methods of use are provided. The devices are useful in the analysis of highly multiplexed optical reactions in large numbers at high densities, including biochemical reactions, such as nucleic acid sequencing reactions. The devices include optical waveguides for illumination of the optical reactions. The devices further provide for the efficient coupling of optical excitation energy from the waveguides to the optical reactions. Optical signals emitted from the reactions can thus be measured with high sensitivity and discrimination using features such as spectra, amplitude, and time resolution, or combinations thereof. The devices of the invention are well suited for miniaturization and high throughput.