A THz-Vibration to THz-Radiation Converter Based on Gold Nanoobjects: a Feasibility Study

TL;DR

This paper explores the feasibility of using gold nanostructures irradiated by microwaves to generate terahertz radiation, proposing a potential THz source based on common microwave ovens and gold nanoobjects.

Contribution

It introduces a novel concept of converting THz vibrations to THz radiation using gold nanobars and nanorings irradiated by microwaves, supported by feasibility estimations.

Findings

Gold nanobars and nanorings can emit THz radiation when irradiated by microwaves.

The emitted photon energies align with the gold phononic density of states (~13.7-17.5 meV).

A practical scheme using a microwave oven and deposited gold nanoobjects is proposed.

Abstract

The estimations done confirm a feasibility of the idea that gold nanobars (GNBs) and nanorings (GNRs) irradiated by microwaves could become the terahertz (THz) emitters with photon energies within the full width at half maximum of longitudinal acoustic phononic DOS of gold (~13.7-17.5 meV, i.e., 3.3-4.2 THz). A scheme of the THz radiation source is suggested based on the domestic microwave oven irradiating a substrate with multiple deposited GNBs or GNRs.