Steve D Penn

Steve D Penn is an Associate Professor of Physics at Hobart and William Smith Colleges (HWS), where he has been a faculty member since 2002. He earned his Ph.D. and B.S. from the Massachusetts Institute of Technology (MIT). His academic home is in the Department of Physics within the School of Natural Sciences and Mathematics.

• Position: Associate Professor of Physics
• Institution: Hobart and William Smith Colleges
• Joined Faculty: 2002
• Education: Ph.D. and B.S. from MIT

Dr. Penn's research is in gravitational wave astrophysics, focusing on enhancing the sensitivity of detectors like LIGO by reducing key noise sources—particularly coating thermal noise. He was part of the team that first measured LIGO's coating thermal noise and contributed to the development of mirror coatings for Advanced LIGO. His current work explores crystalline GaAs/AlGaAs coatings with up to ten times lower noise. This research lies at the intersection of experimental physics, materials science, and astrophysical instrumentation.

The publications highlight a consistent trajectory in gravitational wave detection technology, particularly in material science for high-precision optics. Key themes include thermal noise characterization, mechanical loss in optical coatings, and advancements in mirror technologies for next-generation observatories like Cosmic Explorer and the Einstein Telescope. His collaborative work with the LIGO and Virgo collaborations underscores his role in landmark discoveries, including the first direct detection of gravitational waves.

Dr. Penn is actively engaged in professional service, serving as Council Chair of the LIGO Scientific Collaboration since 2019. He is also a member of the American Physical Society and the Optical Society of America. He has participated in NSF grant review panels and held leadership roles in academic governance at HWS, including chairing the Committee on Standards.

He teaches a broad range of physics courses, from introductory seminars like How Things Work to advanced topics such as General Relativity and Advanced Physics Laboratory. He has developed several new courses at HWS, reflecting his commitment to curriculum innovation and undergraduate education in physics and astrophysics.

His laboratory and research team focus on experimental techniques in precision measurement and optical materials, contributing to national and international efforts in gravitational wave science. While specific lab names are not mentioned, his work is deeply embedded in the LIGO Scientific Collaboration, providing students with access to cutting-edge research infrastructure and collaborative networks.