Michael Gehm

About

Michael Gehm is a Professor of Electrical and Computer Engineering at Duke University and serves as the Director of Graduate Studies in the Department of Electrical and Computer Engineering. He holds a secondary appointment in Physics and is a Fellow of both SPIE and Optica. His educational background includes a B.S. in Mechanical Engineering from Washington University in St. Louis, and both an M.S. and Ph.D. in Physics from Duke University. Gehm's research primarily focuses on computational and compressive sensing and measurement across various modalities, with particular emphasis on electromagnetic and optical systems ranging from RF to x-ray frequencies, as well as all forms of mass spectrometry. His side interests include optical physics, high-performance x-ray simulation, and rapid-prototyping for creating advanced electromagnetic structures. Throughout his career, he has held academic positions at Duke University and the University of Arizona, where he was promoted to Professor before returning to Duke. His contributions to the field have been recognized through his election as a Fellow of SPIE and Optica.

Research topics

• Physics
• Optics
• Chemistry
• Atomic physics
• Optoelectronics
• Chromatography
• Nanotechnology
• Acoustics
• Engineering
• Mechanical engineering

Selected publications

• Improving the Performance of a Cycloidal Coded-Aperture Miniature Mass Spectrometer

  Journal of the American Society for Mass Spectrometry · 2020 · 8 citations

  Cycloidal sector mass analyzers have, in principle, perfect focusing due to perpendicularly oriented uniform electric and magnetic fields, making them ideal candidates for incorporation of spatially coded apertures. We have previously demonstrated a proof-of-concept cycloidal-coded aperture miniature mass spectrometer (C-CAMMS) instrument and achieved a greater than 10-fold increase in throughput without sacrificing resolution, compared with a single slit instrument. However, artifacts were obse…

  PublisherDOI

• The Long Neglected Cycloidal Mass Analyzer

  Analytical Chemistry · 2021 · 7 citations

  In 1938, Walker Bleakney and John A. Hipple first described the cycloidal mass analyzer as the only mass analyzer configuration capable of "perfect" ion focusing. Why has their geometry been largely neglected for many years and how might it earn a respectable place in the world of modern chemical analysis? This Perspective explores the properties of the cycloidal mass analyzer and identifies the lack of suitable ion array detectors as a significant reason why cycloidal mass analyzers are not wid…

  PublisherOA PDFDOI

• Comparison of thermionic filament and carbon nanotube field emitter-based electron ionization sources in cycloidal coded aperture mass analyzers

  International Journal of Mass Spectrometry · 2020 · 6 citations

  PublisherOA PDFDOI

• Design considerations for a cycloidal mass analyzer using a focal plane array detector

  Journal of Mass Spectrometry · 2022-07-01 · 4 citations

  articleOpen access

  With the advent of technologies such as ion array detectors and high energy permanent magnet materials, there is renewed interest in the unique focusing properties of the cycloidal mass analyzer and its ability to enable small, high-resolution, and high-sensitivity instruments. However, most literature dealing with the design of cycloidal mass analyzers assumes a single channel detector because at the time of those publications, compatible multichannel detectors were not available. This manuscri…

  PublisherOA PDFDOI

• A super‐resolution proof of concept in a cycloidal coded aperture miniature mass spectrometer

  Rapid Communications in Mass Spectrometry · 2023-01-19 · 3 citations

  article

  RATIONALE: Higher resolution in fieldable mass spectrometers (MS) is desirable in space flight applications to enable resolving isobaric interferences at m/z < 60 u. Resolution in portable cycloidal MS coupled with array detectors could be improved by reducing the slit width and/or by reducing the width of the detector pixels. However, these solutions are expensive and can result in reduced sensitivity. In this paper, we demonstrate high-resolution spectral reconstruction in a cycloidal coded ap…

  PublisherDOI

Recent grants

• Gradient-index mm-Wave/Terahertz Components via Polymer-jetting Rapid Prototyping

  NSF · $329k · 2009–2012

Frequent coauthors

• David J. Brady

  63 shared

• Hao Xin

  Zhengzhou University

  40 shared

• J. E. Thomas

  North Carolina State University

  34 shared

• K. M. O’Hara

  Pennsylvania State University

  29 shared

• Joel A. Greenberg

  28 shared

• Wei‐Ren Ng

  25 shared

• D. R. Golish

  Planetary Science Institute

  25 shared

• Esteban Vera

  Pontificia Universidad Católica de Valparaíso

  23 shared

Labs

• Duke Electrical & Computer EngineeringPI

Awards & honors

• Fellow. SPIE. 2022
• Fellow. Optica (formerly, OSA). 2020

Similar researchers at Duke University

• David R. Smithh-141
• Christopher Monroeh-140
• Jian Peih-96