Quantum response of carbon nanotube quantum dots to terahertz wave irradiation

作者：T. Fuse, Yasuro Kawano, Tomohiro Yamaguchi, Y. Aoyagi, Koji Ishibashi · 发表于：Nanotechnology · 年份：2006 · DOI：10.1088/0957-4484/18/4/044001 · 被引用次数：32 · 研究领域：Carbon Nanotubes in Composites、Mechanical and Optical Resonators、Molecular Junctions and Nanostructures

Single-electron transport measurements have been carried out at 1.5 K on single-wall carbon nanotube (SWCNT) quantum dots (QDs) under terahertz (THz) irradiation with a frequency of 2.5 THz. The most important finding in this study was new side-peaks that appeared only under the THz irradiation. From the detailed analysis with energy scales associated with the QDs, we conclude that the side-peaks originate from the photon-assisted tunnelling (PAT) of an electron in the QD to the drain electrode. The present THz-PAT is the first observation in QDs because of the larger energy scales in a SWCNT QD, compared with those of standard semiconductor QDs.