Direct measurement of thermal Knudsen forces in rarefied gas environments

GI Acosta, A Jarzembski, M Ghashami - Applied Physics Letters, 2025 - pubs.aip.org
At micro-and nanoscales, momentum transfer between surfaces is influenced by various
physical mechanisms, including quantum fluctuations, electromagnetic interactions, electric …

Lightweight photophoretic flyers with germanium coatings as selective absorbers

Z Lu, G Aldan, D Levin, MF Campbell, I Bargatin - Physical Review Applied, 2024 - APS
The goal of ultrathin lightweight photophoretic flyers, or light flyers for short, is to levitate
continuously in Earth's upper atmosphere using only sunlight for propulsive power. We …