Flat Lenses Based on 2D Perovskite Nanosheets.

Wang, Z; Yang, T; Zhang, Y; Ou, Q; Lin, H; Zhang, Q; Chen, H; Hoh, HY; Jia, B; Bao, Q

Flat Lenses Based on 2D Perovskite Nanosheets.

Wang, Z Yang, T

Zhang, Y Ou, Q Lin, H Zhang, Q Chen, H Hoh, HY Jia, B Bao, Q

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Publisher:: WILEY-V C H VERLAG GMBH
Publication Type:: Journal Article
Citation:: Adv Mater, 2020, 32, (30), pp. e2001388
Issue Date:: 2020-07

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Field	Value	Language
dc.contributor.author	Wang, Z
dc.contributor.author	Yang, T https://orcid.org/0000-0002-8683-2072
dc.contributor.author	Zhang, Y
dc.contributor.author	Ou, Q
dc.contributor.author	Lin, H
dc.contributor.author	Zhang, Q
dc.contributor.author	Chen, H
dc.contributor.author	Hoh, HY
dc.contributor.author	Jia, B
dc.contributor.author	Bao, Q
dc.date.accessioned	2022-10-30T18:53:02Z
dc.date.available	2022-10-30T18:53:02Z
dc.date.issued	2020-07
dc.identifier.citation	Adv Mater, 2020, 32, (30), pp. e2001388
dc.identifier.issn	0935-9648
dc.identifier.issn	1521-4095
dc.identifier.uri	http://hdl.handle.net/10453/162937
dc.description.abstract	Ultrathin flat lenses based on metasurfaces or metamaterials have shown great promise in recent years as essential components in nano-optical system, with capability of abrupt changes of light wavefronts. However, such structural designs require complex nanopatterns and a time-consuming nanofabrication process. In this regard, flat lenses are developed based on 2D perovskite nanosheets, using a cost-effective mask-free femtosecond direct laser writing system. The optical properties of the 2D perovskite are rationally adjusted through facile composition engineering as well as thickness-dependent quantum-size confinement. A diffraction theory model is derived to understand the focusing mechanism of the 2D perovskite nanosheets flat lenses. The as-fabricated lenses exploit the tunable material property variations to effectively manipulate not only the amplitude but also the phase of the incident light to focus into a 3D focal spot with a sub-wavelength resolution in the range of 0.5-0.9λ. The results pave the way toward low-cost and large-scale high-resolution imaging applications in the future.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	WILEY-V C H VERLAG GMBH
dc.relation	http://purl.org/au-research/grants/arc/IH150100006
dc.relation.ispartof	Adv Mater
dc.relation.isbasedon	10.1002/adma.202001388
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Flat Lenses Based on 2D Perovskite Nanosheets.
dc.type	Journal Article
utslib.citation.volume	32
utslib.location.activity	Germany
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access	*
dc.date.updated	2022-10-30T18:52:59Z
pubs.issue	30
pubs.publication-status	Published
pubs.volume	32
utslib.citation.issue	30

Abstract:

Ultrathin flat lenses based on metasurfaces or metamaterials have shown great promise in recent years as essential components in nano-optical system, with capability of abrupt changes of light wavefronts. However, such structural designs require complex nanopatterns and a time-consuming nanofabrication process. In this regard, flat lenses are developed based on 2D perovskite nanosheets, using a cost-effective mask-free femtosecond direct laser writing system. The optical properties of the 2D perovskite are rationally adjusted through facile composition engineering as well as thickness-dependent quantum-size confinement. A diffraction theory model is derived to understand the focusing mechanism of the 2D perovskite nanosheets flat lenses. The as-fabricated lenses exploit the tunable material property variations to effectively manipulate not only the amplitude but also the phase of the incident light to focus into a 3D focal spot with a sub-wavelength resolution in the range of 0.5-0.9λ. The results pave the way toward low-cost and large-scale high-resolution imaging applications in the future.

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http://hdl.handle.net/10453/162937