Akira Tonomura is a prominent physicist known for his work in condensed matter physics and quantum mechanics. He has made significant contributions to the field of electron holography, which allows for high-resolution imaging of electromagnetic fields at the nanoscale. Tonomura's research has implications for materials science, nanotechnology, and the fundamental understanding of quantum phenomena.
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Akira Tonomura used electron holography to test the Aharonov-Bohm effect with magnetic flux confined away from the electron paths. A coated magnetic toroid let electron waves pass through its hole and outside it while a superconducting shield excluded the magnetic field from those paths. The measured relative phase still depended on the enclosed flux. The experiment isolates a quantum phase effect that cannot be inferred from the local classical magnetic force along either path.[ref]
A physicist who developed electron holography and investigated the Aharonov-Bohm effect.[ref]
Benjamin Franklin Medal Awarded to Akira Tonomura, Senior Chief Research Scientist at Hitachi, Ltd.. Opening paragraph: Senior Chief Research Scientist; development of holography electron microscopy
Portrait of Akira Tonomura
. OIST (Okinawa Institute of Science and Technology), 11 May 2009; existing Commons crop by Materialscientist. CC BY 2.0, via Wikimedia Commons. Source.