Abstract
Coupling plasmonic and functional materials provides a promising way to generate multifunctional structures. However, finding plasmonic nanomaterials and elucidating the roles of various geometric and dielectric configurations are tedious. This work describes a combinatorial approach to rapidly exploring and identifying plasmonic heteronanomaterials. Symmetry-broken noble/non-noble metal particle heterojunctions (~100 nanometers) were synthesized on multiwindow silicon chips with silicon nitride membranes. The metal types and the interface locations were controlled to establish a nanoparticle library, where the particle morphology and scattering color can be rapidly screened. By correlating structural data with near- and far-field single-particle spectroscopy data, we found that certain low-energy plasmonic modes could be supported across the heterointerface, while others are localized. Furthermore, we found a series of triangular heteronanoplates stabilized by epitaxial Moiré superlattices, which show strong plasmonic responses despite largely comprising a lossy metal (~70 atomic %). These architectures can become the basis for multifunctional and cost-effective plasmonic devices.
| Original language | English (US) |
|---|---|
| Article number | eadj6129 |
| Journal | Science Advances |
| Volume | 9 |
| Issue number | 51 |
| DOIs | |
| State | Published - Dec 2023 |
Funding
We thank L. Sun, C. Y. Zheng, J. K. Orbeck, and T. Sengupta (Northwestern University) for helpful discussions. This material is based on work supported by the Sherman Fairchild Foundation Inc., the Air Force Office of Scientific Research awards FA9550-17-1-0348 and FA9550-22-1-0300, and the Department of Energy, Office of Basic Energy Science under grant DE-SC0004752 (for theory work). This work made use of the EPIC and NUFAB facilities of Northwestern University\u2019s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633), the IIN, and Northwestern\u2019s MRSEC program (NSF DMR-1720139). Acknowledgments:W ethankL.Sun,C.Y .Zheng,J.K.Orbeck,andT .Sengupta(Northwestern University)forhelpfuldiscussions.Funding:Thismaterialisbasedonworksupportedbythe ShermanFairchildFoundationInc.,theAirFor ce OfficeofScientificResearchawardsFA9550-17-1-0348andFA9550-22-1-0300,andtheDepartmentofEnergy,OfficeofBasicEnergyScience undergrantDE-SC0004752(fortheorywork).ThisworkmadeuseoftheEPICandNUFAB facilities of Northwestern University\u2019s NUANCE Center, which has received support from the SHyNE Resource (NSF ECCS-2025633), the IIN, and Northwestern\u2019s MRSEC program (NSF DMR-1720139).Authorcontributions:J.S.D.,C.A.M.,andV .P .D. conceptualizedthestudy.J.S.D. designedandperformedthesynthesis,electronmicroscopy,anddiffractionsimulations.C.C. performedelectromagneticsimulations.T .W .U. andJ.S.D.performedfar-fieldoptical experiments.C.B.W .performedcross-sectionalimaging.C.A.M.,V .P .D., G.C.S.,andR.P .V .D. supervisedthestudy.Allauthorscontributedtodataanalysis.J.S.D.,C.C.,andC.A.M.led manuscript preparation. All authors except R.P .V .D. revised and discussed the manuscript. Competinginterests:Theauthorsdeclarethattheyhav enocompetinginterests.Dataand materialsavailability:Alldataneededtoevaluatetheconclusionsinthepaperarepresentin thepaperand/ortheSupplementaryMaterials.
ASJC Scopus subject areas
- General