Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions
The scaling down of meta‐atoms or metamolecules (collectively denoted as metaunits) is a long‐lasting issue from the time when the concept of metamaterials was first suggested. According to the effective medium theory, which is the foundational concept of metamaterials, the structural sizes of meta‐...
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| Veröffentlicht in: | Advanced materials (Weinheim) 2020-12, Vol.32 (51), p.e2001806-n/a |
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| creator | Huh, Ji‐Hyeok Kim, Kwangjin Im, Eunji Lee, Jaewon Cho, YongDeok Lee, Seungwoo |
| description | The scaling down of meta‐atoms or metamolecules (collectively denoted as metaunits) is a long‐lasting issue from the time when the concept of metamaterials was first suggested. According to the effective medium theory, which is the foundational concept of metamaterials, the structural sizes of meta‐units should be much smaller than the working wavelengths (e.g., |
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The colloidal self‐assembly of optical metamaterials has come to the fore along with recent advances in synthetic strategies of colloids, self‐assembly routes for clusters and superlattices, and effective medium theory for analyzing colloidal assemblies. In particular, unnatural optical refractions such as extremely high and negative refractive indices could be available with colloidal self‐assembly.</description><identifier>ISSN: 0935-9648</identifier><identifier>EISSN: 1521-4095</identifier><identifier>DOI: 10.1002/adma.202001806</identifier><identifier>PMID: 33079414</identifier><language>eng</language><publisher>Germany: Wiley Subscription Services, Inc</publisher><subject>Assembly ; capacitive coupling ; Colloids ; Effective medium theory ; Lithography ; magnetism ; Materials science ; Metamaterials ; self‐assembly</subject><ispartof>Advanced materials (Weinheim), 2020-12, Vol.32 (51), p.e2001806-n/a</ispartof><rights>2020 Wiley‐VCH GmbH</rights><rights>2020 Wiley-VCH GmbH.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4396-1e3490dc204175fdf76e16b74b087d191a3922e70304fb01b9b88fd72cf6e6963</citedby><cites>FETCH-LOGICAL-c4396-1e3490dc204175fdf76e16b74b087d191a3922e70304fb01b9b88fd72cf6e6963</cites><orcidid>0000-0002-6659-3457</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fadma.202001806$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fadma.202001806$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,777,781,1412,27905,27906,45555,45556</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33079414$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Huh, Ji‐Hyeok</creatorcontrib><creatorcontrib>Kim, Kwangjin</creatorcontrib><creatorcontrib>Im, Eunji</creatorcontrib><creatorcontrib>Lee, Jaewon</creatorcontrib><creatorcontrib>Cho, YongDeok</creatorcontrib><creatorcontrib>Lee, Seungwoo</creatorcontrib><title>Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions</title><title>Advanced materials (Weinheim)</title><addtitle>Adv Mater</addtitle><description>The scaling down of meta‐atoms or metamolecules (collectively denoted as metaunits) is a long‐lasting issue from the time when the concept of metamaterials was first suggested. According to the effective medium theory, which is the foundational concept of metamaterials, the structural sizes of meta‐units should be much smaller than the working wavelengths (e.g., << 1/5 wavelength). At relatively low frequency regimes (e.g., microwave and terahertz), the conventional monolithic lithography can readily address the materialization of metamaterials. However, it is still challenging to fabricate optical metamaterials (metamaterials working at optical frequencies such as the visible and near‐infrared regimes) through the lithographic approaches. This serves as the rationale for using colloidal self‐assembly as a strategy for the realization of optical metamaterials. Colloidal self‐assembly can address various critical issues associated with the materialization of optical metamaterials, such as achieving nanogaps over a large area, increasing true 3D structural complexities, and cost‐effective processing, which all are difficult to attain through monolithic lithography. Nevertheless, colloidal self‐assembly is still a toolset underutilized by optical engineers. Here, the design principle of the colloidally self‐assembled optical metamaterials exhibiting unnatural refractions, the practical challenge of relevant experiments, and the future opportunities are critically reviewed.
The colloidal self‐assembly of optical metamaterials has come to the fore along with recent advances in synthetic strategies of colloids, self‐assembly routes for clusters and superlattices, and effective medium theory for analyzing colloidal assemblies. In particular, unnatural optical refractions such as extremely high and negative refractive indices could be available with colloidal self‐assembly.</description><subject>Assembly</subject><subject>capacitive coupling</subject><subject>Colloids</subject><subject>Effective medium theory</subject><subject>Lithography</subject><subject>magnetism</subject><subject>Materials science</subject><subject>Metamaterials</subject><subject>self‐assembly</subject><issn>0935-9648</issn><issn>1521-4095</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqF0D1PwzAQBmALgWgprIwoEgtLytlx7HisSvmQCpUQnSMnscFVvrAToP8eVy1FYmG6G557dXoROscwxgDkWhaVHBMgADgBdoCGOCY4pCDiQzQEEcWhYDQZoBPnVgAgGLBjNIgi4IJiOkRPs6-2bExn6tdg2pR-LWQZPKpOVrJT1sjSBbqxwSR_M-pjo5Z1LbveerVoO5P7-ay0lXlnmtqdoiPtT9TZbo7Q8nb2Mr0P54u7h-lkHuY0EizEKqICipwAxTzWheZMYZZxmkHCCyywjAQhikMEVGeAM5EliS44yTVTTLBohK62ua1t3nvlurQyLldlKWvV9C4lNCYx8IQQTy__0FXT29p_5xXHHHwlsVfjrcpt45xVOm2tqaRdpxjSTdPppul037Q_uNjF9lmlij3_qdYDsQWfplTrf-LSyc3j5Df8Gzr5iQY</recordid><startdate>20201201</startdate><enddate>20201201</enddate><creator>Huh, Ji‐Hyeok</creator><creator>Kim, Kwangjin</creator><creator>Im, Eunji</creator><creator>Lee, Jaewon</creator><creator>Cho, YongDeok</creator><creator>Lee, Seungwoo</creator><general>Wiley Subscription Services, Inc</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-6659-3457</orcidid></search><sort><creationdate>20201201</creationdate><title>Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions</title><author>Huh, Ji‐Hyeok ; Kim, Kwangjin ; Im, Eunji ; Lee, Jaewon ; Cho, YongDeok ; Lee, Seungwoo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4396-1e3490dc204175fdf76e16b74b087d191a3922e70304fb01b9b88fd72cf6e6963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Assembly</topic><topic>capacitive coupling</topic><topic>Colloids</topic><topic>Effective medium theory</topic><topic>Lithography</topic><topic>magnetism</topic><topic>Materials science</topic><topic>Metamaterials</topic><topic>self‐assembly</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huh, Ji‐Hyeok</creatorcontrib><creatorcontrib>Kim, Kwangjin</creatorcontrib><creatorcontrib>Im, Eunji</creatorcontrib><creatorcontrib>Lee, Jaewon</creatorcontrib><creatorcontrib>Cho, YongDeok</creatorcontrib><creatorcontrib>Lee, Seungwoo</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>MEDLINE - Academic</collection><jtitle>Advanced materials (Weinheim)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huh, Ji‐Hyeok</au><au>Kim, Kwangjin</au><au>Im, Eunji</au><au>Lee, Jaewon</au><au>Cho, YongDeok</au><au>Lee, Seungwoo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions</atitle><jtitle>Advanced materials (Weinheim)</jtitle><addtitle>Adv Mater</addtitle><date>2020-12-01</date><risdate>2020</risdate><volume>32</volume><issue>51</issue><spage>e2001806</spage><epage>n/a</epage><pages>e2001806-n/a</pages><issn>0935-9648</issn><eissn>1521-4095</eissn><abstract>The scaling down of meta‐atoms or metamolecules (collectively denoted as metaunits) is a long‐lasting issue from the time when the concept of metamaterials was first suggested. According to the effective medium theory, which is the foundational concept of metamaterials, the structural sizes of meta‐units should be much smaller than the working wavelengths (e.g., << 1/5 wavelength). At relatively low frequency regimes (e.g., microwave and terahertz), the conventional monolithic lithography can readily address the materialization of metamaterials. However, it is still challenging to fabricate optical metamaterials (metamaterials working at optical frequencies such as the visible and near‐infrared regimes) through the lithographic approaches. This serves as the rationale for using colloidal self‐assembly as a strategy for the realization of optical metamaterials. Colloidal self‐assembly can address various critical issues associated with the materialization of optical metamaterials, such as achieving nanogaps over a large area, increasing true 3D structural complexities, and cost‐effective processing, which all are difficult to attain through monolithic lithography. Nevertheless, colloidal self‐assembly is still a toolset underutilized by optical engineers. Here, the design principle of the colloidally self‐assembled optical metamaterials exhibiting unnatural refractions, the practical challenge of relevant experiments, and the future opportunities are critically reviewed.
The colloidal self‐assembly of optical metamaterials has come to the fore along with recent advances in synthetic strategies of colloids, self‐assembly routes for clusters and superlattices, and effective medium theory for analyzing colloidal assemblies. In particular, unnatural optical refractions such as extremely high and negative refractive indices could be available with colloidal self‐assembly.</abstract><cop>Germany</cop><pub>Wiley Subscription Services, Inc</pub><pmid>33079414</pmid><doi>10.1002/adma.202001806</doi><tpages>23</tpages><orcidid>https://orcid.org/0000-0002-6659-3457</orcidid></addata></record> |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Assembly capacitive coupling Colloids Effective medium theory Lithography magnetism Materials science Metamaterials self‐assembly |
| title | Exploiting Colloidal Metamaterials for Achieving Unnatural Optical Refractions |
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