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Confocal reflectance microscopy for determination of microbubble resonator thickness
Optics Express
|July 21, 2015
Summary
This study introduces a non-destructive optical method to measure microbubble resonator thickness. Reflectance confocal microscopy provides a practical alternative to theoretical evaluations for these high-Q sensors.
Area of Science:
- Optical sensing technologies
- Microfluidic devices
- Advanced materials characterization
Background:
- Optical Micro Bubble Resonators (OMBR) offer high Q-factor and integrated microfluidics for sensing.
- Sensor sensitivity in OMBRs is directly linked to resonator wall thickness.
- Current methods for evaluating OMBR wall thickness are limited to theoretical approaches.
Purpose of the Study:
- To develop and validate a non-destructive method for measuring microbubble resonator shell thickness.
- To utilize reflectance confocal microscopy for precise thickness evaluation.
- To establish a practical alternative to existing theoretical methods.
Main Methods:
- Employing reflectance confocal microscopy to image and measure the shell thickness of microbubbles.
- Validating the microscopy method using precisely etched capillaries of known thicknesses.
- Applying the validated method to actual microbubble resonators.
Main Results:
- Successfully demonstrated a non-destructive technique for microbubble shell thickness measurement.
- Validated the accuracy of the reflectance confocal microscopy method against controlled samples.
- Provided a practical tool for characterizing OMBR dimensions.
Conclusions:
- Reflectance confocal microscopy offers a viable non-destructive method for OMBR shell thickness determination.
- This technique overcomes limitations of purely theoretical evaluations.
- Enables more accurate characterization of OMBRs for enhanced sensor design and performance.
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