期刊
SCIENCE ADVANCES
卷 8, 期 29, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abp8486
关键词
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资金
- Severo Ochoa Program from the Government of the Principality of Asturias [PA-20-PF-BP19-053, PA-18-PF-BP17-126]
- Australian Research Council (ARC) [CE170100039, DE220100154]
- National Science Foundation [CMMI 1538127]
- Ministerio de Ciencia, Innovacion y Universidades through the grant MELODIA [PGC2018-095777-B-C21]
- European Union under the European Regional Development Fund [MAB/2020/14]
- European Union [857543]
- Spanish Ministry of Science, Innovation and Universities (Maria de Maeztu Units of Excellence Program) [RTI2018-094830-B-100, MDM-2016-0618]
- Basque Government [IT1164-19]
- FSE [RYC2018-026196-I]
- Spanish Ministry of Science and Innovation [PID2019-110308GA-I00, MAT201788358-C3-3-R, PID2020115221GB-C42]
- Basque Department of Education [PIBA-2020-1-0014]
- European Research Council [715496]
- Spanish Ministry of Science and Innovation (State Plan for Scientific and Technical Research and Innovation [PID2019-111156GB-I00]
- Shenzhen Nanshan District Pilotage Team Program [LHTD20170006]
- Ramon y Cajal Program of the Government of Spain [RYC2018-026196-I]
- Australian Research Council [DE220100154] Funding Source: Australian Research Council
This article introduces a negative reflection optical phenomenon and directly visualizes polaritons at the nano scale. The research findings show that negative reflection can tune the wavelength and direction of polaritons, providing a new approach for realizing nanophotonics in low-loss natural media.
Negative reflection occurs when light is reflected toward the same side of the normal to the boundary from which it is incident. This exotic optical phenomenon is not only yet to be visualized in real space but also remains unexplored, both at the nanoscale and in natural media. Here, we directly visualize nanoscale-confined polaritons negatively reflecting on subwavelength mirrors fabricated in a low-loss van der Waals crystal. Our near-field nanoimaging results unveil an unconventional and broad tunability of both the polaritonic wavelength and direction of propagation upon negative reflection. On the basis of these findings, we introduce a device in nano-optics: a hyperbolic nanoresonator, in which hyperbolic polaritons with different momenta reflect back to a common point source, enhancing the intensity. These results pave way to realize nanophotonics in low-loss natural media, providing an efficient route to control nanolight, a key for future on-chip optical nanotechnologies.
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