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dc.citation.endPage 6559 -
dc.citation.number 26 -
dc.citation.startPage 6554 -
dc.citation.title PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA -
dc.citation.volume 115 -
dc.contributor.author Lou, Kai -
dc.contributor.author Granick, Steve -
dc.contributor.author Amblard, Francois -
dc.date.accessioned 2023-12-21T20:40:05Z -
dc.date.available 2023-12-21T20:40:05Z -
dc.date.created 2018-07-13 -
dc.date.issued 2018-06 -
dc.description.abstract We amend the general belief that waves with extended spherical wavefront focus at their center of curvature. Instead, when the spherical symmetry of waves is broken by propagating them through a finite aperture along an average direction, the forward/backward symmetry is broken and the focal volume shifts its center backward along that direction. The extent of this focal shift increases as smaller apertures are used, up to the point that the nominal focal plane is out of focus. Furthermore, the loss of axial symmetry with noncircular apertures causes distinct focal shifts in distinct axial planes, and the resulting astigmatism possibly degrades the axial focusing resolution. Using experiments and simulations, focal shift with noncircular apertures is described for classical and temporal focusing. The usefulness of these conclusions to improve imaging resolution is demonstrated in a highr-esolution optical microscopy application, namely line-temporal focusing microscopy. These conclusions follow from fundamental symmetries of the wave geometry and matter for an increasing number of emerging optical techniques. This work offers a general framework and strategy to understand and improve virtually any wave-based application whose efficacy depends on optimal focusing and may be helpful when information is transmitted by waves in applications from electromagnetic communications, to biological and astronomical imaging, to lithography and even warfare. -
dc.identifier.bibliographicCitation PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.115, no.26, pp.6554 - 6559 -
dc.identifier.doi 10.1073/pnas.1803652115 -
dc.identifier.issn 0027-8424 -
dc.identifier.scopusid 2-s2.0-85049043323 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/24406 -
dc.identifier.url http://www.pnas.org/content/115/26/6554 -
dc.identifier.wosid 000436245000044 -
dc.language 영어 -
dc.publisher NATL ACAD SCIENCES -
dc.title How to better focus waves by considering symmetry and information loss -
dc.type Article -
dc.description.isOpenAccess TRUE -
dc.relation.journalWebOfScienceCategory Multidisciplinary Sciences -
dc.relation.journalResearchArea Science & Technology - Other Topics -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor diffraction theory -
dc.subject.keywordAuthor focal shift -
dc.subject.keywordAuthor imaging -
dc.subject.keywordAuthor two-photon microscopy -
dc.subject.keywordAuthor spatiotemporal focusing -
dc.subject.keywordPlus CONVERGING SPHERICAL WAVES -
dc.subject.keywordPlus BOUNDARY DIFFRACTION WAVE -
dc.subject.keywordPlus MAGGI-RUBINOWICZ THEORY -
dc.subject.keywordPlus FOCAL-SHIFT -
dc.subject.keywordPlus GAUSSIAN BEAMS -
dc.subject.keywordPlus ELECTROMAGNETIC DIFFRACTION -
dc.subject.keywordPlus INTEGRAL-REPRESENTATION -
dc.subject.keywordPlus OPTICAL SYSTEMS -
dc.subject.keywordPlus FRESNEL-NUMBER -
dc.subject.keywordPlus COHERENT BEAM -

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