Uncooled Poisson Bolometer for High-Speed Event-Based Long-wave Thermal Imaging

TL;DR

This paper introduces a novel uncooled Poisson bolometer for high-speed, energy-efficient long-wave infrared thermal imaging, operating at room temperature with superior temporal resolution and low power consumption.

Contribution

It presents the first event-based infrared detector using a spintronic Poisson bolometer capable of broadband detection and high-speed operation without cryogenic cooling.

Findings

Achieved a maximum event rate of 1,250 Hz, outperforming traditional microbolometers.

Operates at room temperature with low power consumption of 0.2μW per pixel.

Demonstrated a new operating principle for infrared sensing based on stochastic switching events.

Abstract

Event-based vision provides high-speed, energy-efficient sensing for applications such as autonomous navigation and motion tracking. However, implementing this technology in the long-wave infrared remains a significant challenge. Traditional infrared sensors are hindered by slow thermal response times or the heavy power requirements of cryogenic cooling. Here, we introduce the first event-based infrared detector operating in a Poisson-counting regime. This is realized with a spintronic Poisson bolometer capable of broadband detection from 0.8-14$\mu\text{m}$. In this regime, infrared signals are detected through statistically resolvable changes in stochastic switching events. This approach enables room-temperature operation with high timing resolution. Our device achieves a maximum event rate of 1,250 Hz, surpassing the temporal resolution of conventional uncooled microbolometers by a factor of 4. Power consumption is kept low at 0.2$\mu$W per pixel. This work establishes an operating principle for infrared sensing and demonstrates a pathway toward high-speed, energy-efficient, event-driven thermal imaging.