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Zhao, Bum Suk
Molecular Motion Control Lab (MMCL)
Research Interests
  • Standing wave, quantum state, optical force, grazing inceidence, atom optics, matter wave

Enhanced elastic scattering of He-2 and He-3 from solids by multiple-edge diffraction

DC Field Value Language Kim, Lee Yeong ko Park, Sanghwan ko Lee, Chang Young ko Schollkopf, Wieland ko Zhao, Bum Suk ko 2022-09-16T04:53:00Z - 2022-09-08 ko 2022-09 ko
dc.identifier.citation PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.24, no.36, pp.21593 - 21600 ko
dc.identifier.issn 1463-9076 ko
dc.identifier.uri -
dc.description.abstract We report on a method of enhanced elastic and coherent reflection of He-4(2) and He-4(3) from a micro-structured solid surface under grazing incidence conditions. The van der Waals bound ground-state helium clusters exhibit fundamental quantum effects: He-4(2), characterized by a single ro-vibrational bound state of 10(-7) eV dissociation energy, is known to be a quantum halo state; and He-4(3) is the only electronic ground-state triatomic system possessing an Efimov state in addition to the ro-vibrational ground state. Classical methods to select and manipulate these clusters by interaction with a solid surface fail due to their exceedingly fragile bonds. Quantum reflection under grazing incidence conditions was demonstrated as a viable tool for elastic scattering from a solid surface but suffers from small reflection probabilities for typical conditions. Here we demonstrate that multiple-edge diffraction enables enhanced elastic scattering of the clusters from a solid. A dual-period reflection grating, where the strips consist of micro-structured edge arrays, shows an up to ten fold increased reflection probability as compared to its conventional counterpart where the strips are plane patches enabling quantum reflection of the clusters. The observed diffraction patterns of the clusters provide evidence of the coherent and elastic nature of scattering by multiple-edge diffraction. ko
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title Enhanced elastic scattering of He-2 and He-3 from solids by multiple-edge diffraction ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85136271150 ko
dc.identifier.wosid 000840698600001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/d2cp02641d ko
dc.identifier.url ko
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