Gong Jingrui, Zhang Shuo, Duan Gaoyan, Qi Limei, Yang Yang
State Key Laboratory of Information Photonics and Optical Communications, School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China.
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Heliyon. 2023 Mar 5;9(3):e14314. doi: 10.1016/j.heliyon.2023.e14314. eCollection 2023 Mar.
Two-dimensional transition-metal dichalcogenide (TMDC) exhibits a series of distinctive optical and electrical characteristics, which make it has a good application prospect in the field of optical manipulation. Based on the Mie theory, we investigate the radiation force exerted on the TMDC wrapped dielectric particle by Gaussian wave. Theoretical calculations show that the optical force spectra exhibit two resonant peaks in the visible region, which are generated by the interband exciton transitions in TMDC. Magnitude and morphology of the excitonic peaks could be modulated effectively by tuning the number of coated TMDC layers. Furthermore, the excitonic peaks transform significantly with particle size due to the variation of coupling strength between the dielectric particle and TMDC coating. The investigation provides potential applications in optical manipulations and light-matter interactions.
二维过渡金属二硫属化物（TMDC）展现出一系列独特的光学和电学特性，这使其在光操控领域具有良好的应用前景。基于米氏理论，我们研究了高斯波对包裹有TMDC的介电粒子施加的辐射力。理论计算表明，光力谱在可见光区域呈现出两个共振峰，这是由TMDC中的带间激子跃迁产生的。通过调整包裹的TMDC层数，可以有效地调制激子峰的幅度和形态。此外，由于介电粒子与TMDC涂层之间耦合强度的变化，激子峰随粒子尺寸发生显著变化。该研究为光操控和光与物质相互作用提供了潜在应用。
