Advanced engineering of single-crystal gold nanoantennas

Abstract

A nanofabrication process for realizing optical nanoantennas carved from a single-crystal gold plate is presented in this communication. The method relies on synthesizing two-dimensional micron-size gold crystals followed by the dry etching of a desired antenna layout. The fabrication of single-crystal optical nanoantennas with standard electron-beam lithography tool and dry etching reactor represents an alternative technological solution to focused ion beam milling of the objects. The process is exemplified by engineering nanorod antennas. Dark-field spectroscopy indicates that optical antennas produced from single crystal flakes have reduced localized surface plasmon resonance losses compared to amorphous designs of similar shape. The present process is easily applicable to other metals such as silver or copper and offers a design flexibility not found in crystalline particles synthesized by colloidal chemistry.

References in corpus (2)

• Graphene plasmonics
• Atomically flat single-crystalline gold nanostructures for plasmonic nanocircuitry

Cited by in corpus (4)

• Roadmap on Nonlocality in Photonic Materials and Metamaterials
• Interfacial Hot Carrier Collection Controls Plasmonic Chemistry
• Ultimate limit for optical losses in gold, revealed by quantitative near-field microscopy
• On-chip Single-crystal Plasmonic Optoelectronics for Efficient Hot Carrier Collection and Photovoltage Detection