Gaptronics: multilevel photonics applications spanning zero-nanometer limits

Abstract: With recent advances in nanofabrication technology, various metallic gap structures with gap widths reaching a few to sub-nanometer, and even ‘zero-nanometer’, have been realized. At such regime, metallic gaps not only exhibit strong electromagnetic field confinement and enhancement, but also incorporate various quantum phenomena in a macroscopic scale, finding applications in ultrasensitive detection using nanosystems, enhancement of light–matter interactions in low-dimensional materials, and ultralow-power manipulation of electromagnetic waves, etc. Therefore, moving beyond nanometer to ‘zero-nanometer’ can greatly diversify applications of metallic gaps and may open the field of dynamic ‘gaptronics.’ In this paper, an overview is given on wafer-scale metallic gap structures down to zero-nanometer gap width limit. Theoretical description of metallic gaps from sub-10 to zero-nanometer limit, various wafer-scale fabrication methods and their applications are presented. With such versatility and broadband applicability spanning visible to terahertz and even microwaves, the field of ‘gaptronics’ can be a central building block for photochemistry, quantum optical devices, and 5/6G communications.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Gaptronics: multilevel photonics applications spanning zero-nanometer limits ; volume:11 ; number:7 ; year:2022 ; pages:1231-1260 ; extent:030 ; Nanophotonics ; 11, Heft 7 (2022), 1231-1260 (gesamt 030)

Contributors, Places and Time

• Creator: Jeong, Jeeyoon ; Kim, Hyun Woo ; Kim, Dai-Sik

Further information

• DOI: 10.1515/nanoph-2021-0798
• URN: urn:nbn:de:101:1-2022080214352179559331
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:33 AM CEST