Noise effect on 2D photoluminescence decay analysis using the RATS method in a single-pixel camera configuration

Area of Science:

• Photonic Spectroscopy
• Materials Science
• Analytical Chemistry

Background:

• Photoluminescence (PL) dynamics are crucial for understanding material properties.
• The random temporal signal for sample excitation (RATS) method provides a novel approach for PL measurements.
• RATS can be applied in 0D (single-point) and 2D (imaging) configurations, but noise affects signal reconstruction.

Purpose of the Study:

• To analyze the impact of noise on the RATS method for PL dynamics.
• To investigate strategies for noise suppression in RATS measurements.
• To provide guidelines for optimizing RATS measurements and deconvolution techniques.

Main Methods:

• Extensive simulations were performed to model noise effects.
• Analysis focused on noise from random excitation signals and PL waveforms.
• Investigated the influence of acquisition time, measurement count, and regularization parameters.

Main Results:

• PL signal noise level is critical for RATS method performance.
• Increased acquisition time is beneficial, especially with non-periodic excitation.
• An optimal regularization parameter exists, dependent on the dataset's noise level.

Conclusions:

• Noise significantly affects RATS method accuracy, necessitating careful consideration.
• Acquisition time and regularization parameter selection are key optimization factors.
• Findings offer generalizable insights for PL decay measurements involving deconvolution.