Ring Resonator Integrated Chip for Viral Detection
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Solution Overview
Problem
Existing viral detection methods are time-consuming, expensive, and require trained operation and interpretation, and photonic sensors used for viral detection often suffer from temperature dependency and fabrication sensitivity, necessitating extrinsic spectral calibration devices.
Innovation Solution
A selectively-sensing photonic microfluidic optical ring resonator-based integrated chip architecture with an on-chip spectrometer consisting of coupled ring resonator filters and integrated photodetector arrays, which reduces fabrication-induced performance variation and thermal sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If extrinsic spectral calibration devices are used to compensate for temperature dependency and fabrication sensitivity, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent merges the sensor ring resonator and filter ring resonators into a single integrated photonic chip structure. Both resonators are fabricated using the same process on the same substrate, sharing common waveguides and optical paths. This integration eliminates the need for separate extrinsic calibration devices while maintaining spectral accuracy through the differential measurement capability of the integrated structure.
Solution Approach 2:
The filter ring resonators serve as self-calibrating references within the system. By comparing the resonance wavelengths of the sensor ring resonator against the known resonance wavelengths of the filter ring resonators, the system automatically compensates for temperature variations and fabrication tolerances without requiring external calibration equipment.
2Measurement precision
If ring resonators are used for viral detection, then detection sensitivity is improved, but temperature dependency increases
Solution Approach 1:
The filter ring resonators act as intermediary reference elements that mediate between the sensor ring resonator and the measurement system. By introducing these reference resonators with known spectral characteristics, the system can distinguish between wavelength shifts caused by viral detection and those caused by temperature variations, thereby maintaining detection sensitivity while compensating for thermal effects.
Solution Approach 2:
The system implements a feedback mechanism where the resonance wavelengths of both the sensor and filter ring resonators are continuously monitored. The measured wavelength shifts are fed back to the detection algorithm, which uses the filter resonator data to compensate for temperature-induced drift, thereby maintaining accurate viral detection across varying thermal conditions.
3Measurement precision
If multiple ring resonators are integrated on-chip, then manufacturing precision requirements increase, but fabrication-induced performance variation decreases
Solution Approach 1:
The patent employs homogeneous fabrication processes to create both the sensor ring resonator and filter ring resonators using identical materials, waveguide structures, and manufacturing steps. This homogeneity ensures that both resonators experience the same fabrication-induced variations, allowing the system to differential out common-mode errors and achieve high spectral accuracy despite manufacturing 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 integrated chip architecture provides a robust, cost-effective, and portable solution for viral detection, capable of detecting ultralow virus loads with spectral accuracy <5 picometers, while being insensitive to temperature and fabrication variations.
Implementation Method 1
ring resonator based spectroscopy
Implementation Method 2
sensing ring resonator functionalized to be sensitive to an analyte
Implementation Method 3
integrated photodetector arrays
Data Source
AI summary
Provided is a device, device for analyte detection, comprising: a first waveguide; a sensor ring resonator, optically coupled to the first waveguide, wherein the sensor ring resonator is sensitive to an analyte; multiple filter ring resonators optically coupled to the sensor ring resonator, one or more detectors, wherein each of the multiple filter ring resonators is optically coupled to at least one of the one or more detectors; and at least a first microfluidic channel, wherein the first microfluidic channel configured to fluidically deliver an analyte to the sensor ring resonator.