Figure 1
From: Observation of terahertz-radiation-induced ionization in a single nano island
A nano island embedded in a slot antenna sample and high power time domain THz system.
Scanning electron microscope (SEM) images of (a) a metallic nano island in a slot antenna defined by a focused ion beam (FIB) and (b) a nanopillar structure with a gold island on top formed by a reactive ion etching (RIE) process. (c) Schematic of a high power THz source and detection system. Amplified femtosecond laser pulses with a 1 kHz repetition rate were applied for the THz time domain spectroscopy.
