期刊论文

Yang, Wen

英文

PHYSICAL REVIEW APPLIED

2331-7019

2019

12

3

034003

10.1103/PhysRevApplied.12.034003

Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDB28000000]; NSFCNational Natural Science Foundation of China (NSFC) [11434010, 61674145, 11774021]; MOST of ChinaMinistry of Science and Technology, China [2016YFE0110000, 2017YFA0303400]; Chinese Academy of SciencesChinese Academy of Sciences [QYZDJ-SSW-SYS001, XXH13506-202, XDPB0603]; NSFC program for the "Scientific Research Center" [U1930402]

本校为其他机构

Terahertz (THz) radiation sources ranging from 0.3 to 10 THz are the last frontier of the light spectrum because of the relative lack of physical systems that can operate in this regime, the well-known "THz gap." We propose a mechanism for frequency down-conversion to produce THz radiation covering most of the THz gap by utilizing the approximately equidistant helical edge states in topological insulator quantum dots. If the edge-state level separation inside the phonon gap is chosen to suppress phonon-induced nonradiative decay, a topological insulator quantum dot array in a resonant cavity c...