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PbS-based SWIR micro-spectrometer with on-chip Fabry-Perot filter array.

Taipeng Li, Ge Mu, Qun Hao

|October 1, 2024

Summary

This summary is machine-generated.

We developed high-performance short-wave infrared (SWIR) micro-spectrometers using lead sulfide (PbS) thin films and Fabry-Perot filters. These portable devices show promise for sensitive chemical analysis applications.

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Area of Science:

Spectroscopy
Materials Science
Optoelectronics

Background:

Miniaturized spectrometers are crucial for diverse applications like chemical analysis and medical diagnostics.
Current micro-spectrometers primarily operate in the visible light spectrum, limiting their utility.
There is a need for portable spectrometers that can analyze short-wave infrared (SWIR) light.

Purpose of the Study:

To develop high-performance SWIR micro-spectrometers.
To integrate wafer-scale lead sulfide (PbS) thin films with on-chip Fabry-Perot filter arrays.
To enhance the optoelectronic performance of PbS detectors for practical applications.

Main Methods:

Optimized chemical bath deposition (CBD) conditions for PbS thin films.
Fabricated on-chip Fabry-Perot filter arrays.
Integrated PbS detectors with the filter arrays to create SWIR micro-spectrometers.

Main Results:

Achieved high-performance SWIR micro-spectrometers.
Demonstrated markedly improved optoelectronic performance of PbS detectors.
Showcased the capability of the developed micro-spectrometers for chemical analysis.

Conclusions:

The integration of optimized PbS thin films with Fabry-Perot filters enables high-performance SWIR micro-spectrometers.
These portable SWIR micro-spectrometers offer high sensitivity for chemical analysis.
The developed technology broadens the application scope of micro-spectroscopy into the SWIR range.