Broadband spin‐controlled focusing via logarithmic‐spiral nanoslits of varying width
Abstract: This work presents analytical, numerical and experimental demonstrations of light diffracted through a logarithmic spiral (LS) nanoslit, which forms a type of switchable and focus‐tunable structure. Owing to a strong dependence on the incident photon spin, the proposed LS‐nanoslit converges incoming light of opposite handedness (to that of the LS‐nanoslit) into a confined subwavelength spot, while it shapes light with similar chirality into a donut‐like intensity profile. Benefitting from the varying width of the LS‐nanoslit, different incident wavelengths interfere constructively at different positions, i.e., the focal length shifts from 7.5 μm (at λ = 632.8 nm) to 10 μm (at λ = 488 nm), which opens up new opportunities for tuning and spatially separating broadband light at the micrometer scale.
- Standort
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Deutsche Nationalbibliothek Frankfurt am Main
- Umfang
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Online-Ressource
- Sprache
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Englisch
- Erschienen in
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Broadband spin‐controlled focusing via logarithmic‐spiral nanoslits of varying width ; volume:9 ; number:6 ; year:2015 ; pages:674-681 ; extent:8
Laser & photonics reviews ; 9, Heft 6 (2015), 674-681 (gesamt 8)
- Urheber
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Mehmood, M. Q.
Liu, Hong
Huang, Kun
Mei, Shengtao
Danner, Aaron
Luk'yanchuk, Boris
Zhang, Shuang
Teng, Jinghua
Maier, Stefan A.
Qiu, Cheng‐Wei
- DOI
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10.1002/lpor.201500116
- URN
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urn:nbn:de:101:1-2022122306443236830654
- Rechteinformation
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Letzte Aktualisierung
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15.08.2025, 07:24 MESZ
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Beteiligte
- Mehmood, M. Q.
- Liu, Hong
- Huang, Kun
- Mei, Shengtao
- Danner, Aaron
- Luk'yanchuk, Boris
- Zhang, Shuang
- Teng, Jinghua
- Maier, Stefan A.
- Qiu, Cheng‐Wei
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