GaSb-based mid-wave computational multispectral infrared detectors based on photonic crystal plates

Area of Science:

• Optoelectronics
• Materials Science
• Computational Imaging

Background:

• Traditional mid-wave multispectral detectors face limitations in working band and energy utilization.
• Existing technologies combine spectrometer and infrared detector capabilities, crucial for civil and military applications.

Purpose of the Study:

• To present an integrated superlattice mid-wave multispectral hypersurface detector for computational multispectroscopy.
• To overcome the limitations of working band and low energy utilization in current detectors.

Main Methods:

• Utilized photonic crystal (PC) plates made of GaSb material to modulate incident spectra.
• Employed the finite difference time domain (FDTD) method to simulate PC structural parameters.
• Calculated transmission spectra correlation coefficients and energy utilization rates for optimized structures.

Main Results:

• Optimized PC structures demonstrated unique response curves and rich spectral features.
• Achieved an average Pearson correlation coefficient (PCC) below 0.3.
• Attained an energy utilization rate exceeding 50%.

Conclusions:

• The developed hypersurface detector enables computational multispectroscopy for the first time.
• The detector's design offers significant improvements in spectral modulation and energy efficiency.
• Potential applications span astronomical remote sensing, medical diagnostics, and military reconnaissance.