Modulation of THz radiation via enhanced Dirac plasmon-dual phonon interaction

Lu，Junpeng1; Liu，Hongwei2; Yu，Yuanfang1; Ni，Zhenhua1; Zhang，Xinhai3

2019-12-16

10.1063/1.5128891

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

Imaging with terahertz (THz) radiation is a crucial technique that promotes its applications in security inspection, crack detection, biomedical imaging, and so forth. THz modulation is one of the critical factors (others include generation, propagation, and detection) of the THz fast imaging technique. In this work, an efficient THz radiation modulator is realized based on the as-grown BiSe nanowires. Different from the conventional metamaterials or plasmonic devices, fabrication of subwavelength structures is unnecessary in this manipulation. The modulation is facilitated via synergistic Fano-type interaction of topological surface plasmons with two phonons in BiSe nanowires. The comprehensive control of the modulation is realized in a direct optical manner. A high modulation depth of 1826% has been demonstrated in this modulator. The realization of such a THz modulator based on an as-grown system indicates the possibility of the modulation extricating from fabrication of complicated postgrowth micro/nanostructures.

SCI ; EI

英语

NI论文

其他

Jiangsu Natural Science Foundation[BK20170694]

Physics

Physics, Applied

WOS:000505535900017

American Institute of Physics Inc.

20195207932701

Bismuth compounds ; Crack detection ; Medical imaging ; Modulation ; Nanowires ; Phonons ; Plasmonics ; Selenium compounds

Electromagnetic Waves:711 ; Imaging Techniques:746 ; Nanotechnology:761 ; Solid State Physics:933

PHYSICS

2-s2.0-85076996903

Scopus

1.School of Physics,Southeast University,Nanjing,2 Southeast University Road,211189,China
2.Jiangsu Key Lab on Opto-Electronic Technology,School of Physics and Technology,Nanjing Normal University,Nanjing,1 Wenyuan Road,210023,China
3.Department of Electrical and Electronic Engineering,South University of Science and Technology of China,Shenzhen,1088 Xueyuan Road,518055,China

Lu，Junpeng,Liu，Hongwei,Yu，Yuanfang,et al. Modulation of THz radiation via enhanced Dirac plasmon-dual phonon interaction[J]. APPLIED PHYSICS LETTERS,2019,115(25).

Lu，Junpeng,Liu，Hongwei,Yu，Yuanfang,Ni，Zhenhua,&Zhang，Xinhai.(2019).Modulation of THz radiation via enhanced Dirac plasmon-dual phonon interaction.APPLIED PHYSICS LETTERS,115(25).

Lu，Junpeng,et al."Modulation of THz radiation via enhanced Dirac plasmon-dual phonon interaction".APPLIED PHYSICS LETTERS 115.25(2019).