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dc.contributor.authorGuo, Wan-Pingen_US
dc.contributor.authorLiang, Wei-Yunen_US
dc.contributor.authorCheng, Chang-Weien_US
dc.contributor.authorWu, Wei-Linen_US
dc.contributor.authorWang, Yen-Tingen_US
dc.contributor.authorSun, Quanen_US
dc.contributor.authorZu, Shuaien_US
dc.contributor.authorMisawa, Hiroakien_US
dc.contributor.authorCheng, Pi-Juen_US
dc.contributor.authorChang, Shu-Weien_US
dc.contributor.authorAhn, Hyeyoungen_US
dc.contributor.authorLin, Minn-Tsongen_US
dc.contributor.authorGwo, Shangjren_US
dc.date.accessioned2020-07-01T05:21:19Z-
dc.date.available2020-07-01T05:21:19Z-
dc.date.issued2020-04-08en_US
dc.identifier.issn1530-6984en_US
dc.identifier.urihttp://dx.doi.org/10.1021/acs.nanolett.0c00645en_US
dc.identifier.urihttp://hdl.handle.net/11536/154390-
dc.description.abstractTwo-dimensional spiral plasmonic structures have emerged as a versatile approach to generate near-field vortex fields with tunable topological charges. We demonstrate here a far-field approach to observe the chiral second-harmonic generation (SHG) at designated visible wavelengths from a single plasmonic vortex metalens. This metalens comprises an Archimedean spiral slit fabricated on atomically flat aluminum epitaxial film, which allows for precise tuning of plasmonic resonances and subsequent transfer of two-dimensional materials on top of the spiral slit. The nonlinear optical measurements show a giant SHG circular dichroism. Furthermore, we have achieved an enhanced chiral SHG conversion efficiency (about an order of magnitude greater than the bare aluminum lens) from monolayer tungsten disulfide (WS2)/aluminum metalens, which is designed at the C-exciton resonance of WS2. Since the C-exciton is not a valley exciton, the enhanced chiral SHG in this hybrid system originates from the plasmonic vortex field-enhanced SHG under the optical spin-orbit interaction.en_US
dc.language.isoen_USen_US
dc.subjectSurface plasmonic vortex metalensen_US
dc.subjectoptical spin-orbit interactionen_US
dc.subjectchiral nonlinearityen_US
dc.subjectsecond-harmonic generationen_US
dc.subjectaluminum epitaxial filmen_US
dc.subjectmonolayer tungsten disulfideen_US
dc.titleChiral Second-Harmonic Generation from Monolayer WS2/Aluminum Plasmonic Vortex Metalensen_US
dc.typeArticleen_US
dc.identifier.doi10.1021/acs.nanolett.0c00645en_US
dc.identifier.journalNANO LETTERSen_US
dc.citation.volume20en_US
dc.citation.issue4en_US
dc.citation.spage2857en_US
dc.citation.epage2864en_US
dc.contributor.department交大名義發表zh_TW
dc.contributor.department電子物理學系zh_TW
dc.contributor.department光電工程學系zh_TW
dc.contributor.departmentNational Chiao Tung Universityen_US
dc.contributor.departmentDepartment of Electrophysicsen_US
dc.contributor.departmentDepartment of Photonicsen_US
dc.identifier.wosnumberWOS:000526413400084en_US
dc.citation.woscount0en_US
Appears in Collections:Articles