Utkarsh Singh on Poisson Bolometers and Nanoscale Infrared Detection at Purdue ECE Host Kristin Malavenda interviews Purdue ECE PhD student Utkarsh Singh about his path from New Delhi to Purdue and his research on nanoscale spintronic devices for long-wave infrared (8–14 µm) detection. Singh explains how nanoscale structures exhibit new physics and can enable smaller, lower-power detectors with different, more digital readout behavior than traditional analog infrared sensors. He describes Poisson bolometers, which treat fluctuations between discrete resistance states as a useful noise signal, measuring changes in switching statistics under infrared radiation rather than minimizing noise. The conversation covers applications including surveillance, biomedical imaging, astronomy, and heat-assisted detection and ranging, as well as challenges in fa ...