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Published on: November 30, 2012
Cavity-enhanced multispectral photodetector using phase-tuned propagation: theory and design
Jianfei Wang1, Juejun Hu, Xiaochen Sun
1Microphotonics Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Optics Letters
|March 3, 2010
Summary
This study introduces a novel photodetector design for simultaneous multi-wavelength sensing in a single pixel. The innovative approach minimizes crosstalk and noise, enabling broad infrared spectrum detection.
Area of Science:
- Optoelectronics
- Photonics
- Materials Science
Background:
- Current photodetectors often lack the ability to simultaneously sense multiple wavelengths within a single pixel.
- Multispectral sensing is crucial for advanced applications in telecommunications, imaging, and biochemical analysis.
- Existing designs may suffer from spectral crosstalk and noise, limiting performance.
Purpose of the Study:
- To propose and theoretically analyze a novel cavity-enhanced photodetector design.
- To achieve simultaneous multi-wavelength sensing in a single pixel.
- To demonstrate the potential for covering the near to far infrared spectrum.
Main Methods:
- Theoretical analysis of a novel photodetector design.
- Utilizing phase-tuned propagation of resonant modes in cascaded planar resonant cavities.
- Generalizing the concept for broad spectral coverage.
Main Results:
- The proposed design enables simultaneous sensing of multiple wavelengths in a single pixel.
- The design covers the entire near to far infrared spectrum.
- Minimal spectral crosstalk and significantly suppressed noise were achieved.
Conclusions:
- The novel cavity-enhanced photodetector design offers simultaneous multispectral sensing capabilities.
- The design exhibits excellent performance with low crosstalk and noise.
- Its versatility, scalability, and fabrication compatibility suggest wide applications in telecommunications, infrared imaging, and biochemical sensing.
