Angela Feldhaus
CEO, Rarefied
Angela Feldhaus joins the Breakthrough Energy Fellows program from Rarefied in Somerville, MA. Angela brings expertise in photophoretic levitation developed through her PhD research at Harvard University and over a decade of nanofabrication experience. With a background in physics and economics, she excels in both technical R&D and product commercialization.
Rarefied is developing a novel photophoretic propulsion mechanism capable of indefinitely levitating platforms in near-space (30-100 km altitudes) without power or moving parts. It is the only hardware capable of sustained flight in the mesosphere, a region inaccessible to conventional aircraft or satellites. This product offers a sustainable alternative to current space hardware and addresses critical needs in climate data collection, disaster preparedness, and telecommunications. Through the Fellows program, Rarefied hopes to advance their product development and commercialization pathway.
In her free time, Angela enjoys hiking and spending time in nature. She received a Bachelor of Science in Applied Mathematics and Physics from the University of New Mexico and holds a Master of Science in Applied Mathematics from Harvard University. She went on academic leave from her PhD program at Harvard to focus on Rarefied full time.
Q&A
What is your favorite word and why?
Logic. It is the foundation of clear thinking, the guiding principle that leads to objective decision-making and the resolution of complex problems. Logic transcends bias, which is essential for the pursuit of knowledge and the betterment of society.
What beliefs drive you?
I believe in the importance of seeking truth through reason and empirical evidence in order to contribute meaningfully to the well-being of others and the advancement of understanding.
Share a fun fact about yourself
I love the cold, I’m at my happiest when the temperature is below 0F. I’ll take a frigid winter day over the beach any day!
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