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Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material
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dc.contributor.author | Alam, M. Zahirul | |
dc.contributor.author | Schulz, Sebastian Andreas | |
dc.contributor.author | Upham, Jeremy | |
dc.contributor.author | De Leon, Israel | |
dc.contributor.author | Boyd, Robert W. | |
dc.date.accessioned | 2018-07-25T23:34:34Z | |
dc.date.available | 2018-07-25T23:34:34Z | |
dc.date.issued | 2018-02 | |
dc.identifier | 252286172 | |
dc.identifier | 252c9bdb-703e-4cd2-b9f3-7a7e1a087af1 | |
dc.identifier | 85041128036 | |
dc.identifier.citation | Alam , M Z , Schulz , S A , Upham , J , De Leon , I & Boyd , R W 2018 , ' Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material ' , Nature Photonics , vol. 12 , no. 2 , pp. 79-83 . https://doi.org/10.1038/s41566-017-0089-9 | en |
dc.identifier.issn | 1749-4885 | |
dc.identifier.other | ORCID: /0000-0001-5169-0337/work/42767155 | |
dc.identifier.uri | https://hdl.handle.net/10023/15708 | |
dc.description.abstract | The size and operating energy of a nonlinear optical device are fundamentally constrained by the weakness of the nonlinear optical response of common materials1. Here, we report that a 50-nm-thick optical metasurface made of optical dipole antennas coupled to an epsilon-near-zero material exhibits a broadband (∼400 nm bandwidth) and ultrafast (recovery time less than 1 ps) intensity-dependent refractive index n2 as large as −3.73 ± 0.56 cm2 GW−1. Furthermore, the metasurface exhibits a maximum optically induced refractive index change of ±2.5 over a spectral range of ∼200 nm. The inclusion of low-Q nanoantennas on an epsilon-near-zero thin film not only allows the design of a metasurface with an unprecedentedly large nonlinear optical response, but also offers the flexibility to tailor the sign of the response. Our technique removes a longstanding obstacle in nonlinear optics: the lack of materials with an ultrafast nonlinear contribution to refractive index on the order of unity. It consequently offers the possibility to design low-power nonlinear nano-optical devices with orders-of-magnitude smaller footprints. | |
dc.format.extent | 6 | |
dc.format.extent | 6129647 | |
dc.language.iso | eng | |
dc.relation.ispartof | Nature Photonics | en |
dc.subject | QC Physics | en |
dc.subject | T Technology | en |
dc.subject | NDAS | en |
dc.subject | BDC | en |
dc.subject | R2C | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | T | en |
dc.title | Large optical nonlinearity of nanoantennas coupled to an epsilon-near-zero material | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.1038/s41566-017-0089-9 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2018-07-26 |
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