Electron dynamics and optical properties modulation of monolayer MoS2 by femtosecond laser pulse: a simulation using time-dependent density functional theory
| العنوان: | Electron dynamics and optical properties modulation of monolayer MoS2 by femtosecond laser pulse: a simulation using time-dependent density functional theory |
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| المؤلفون: | Xiaoxing Su, Yongfeng Lu, Liangti Qu, Feng Wang, Lan Jiang, Gaoshi Su |
| المصدر: | Applied Physics A. 123 |
| بيانات النشر: | Springer Science and Business Media LLC, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Materials science, business.industry, Physics::Optics, 02 engineering and technology, General Chemistry, Dielectric, Time-dependent density functional theory, 021001 nanoscience & nanotechnology, Laser, 01 natural sciences, law.invention, Multiphoton intrapulse interference phase scan, law, 0103 physical sciences, Femtosecond, Monolayer, Optoelectronics, General Materials Science, Density functional theory, sense organs, 010306 general physics, 0210 nano-technology, Anisotropy, business |
| الوصف: | In this study, we adopted time-dependent density functional theory to investigate the optical properties of monolayer MoS2 and the effect of intense few-cycle femtosecond laser pulses on these properties. The electron dynamics of monolayer MoS2 under few-cycle and multi-cycle laser irradiation were described. The polarization direction of the laser had a marked effect on the energy absorption and electronic excitation of monolayer MoS2 because of anisotropy. Change in the polarization direction of few-cycle pulse changed the absorbed energy by a factor over 4000. Few-cycle pulse showed a higher sensitivity to the electronic property of material than multi-cycle pulse. The modulation of the dielectric properties of the material was observed on the femtosecond time scale. The negative divergence appeared in the real part of the function at low frequencies and photoinduced blue shift occurred due to Burstein-Moss effect. The irradiation of femtosecond laser caused the dielectric response within the infrared region and introduced anisotropy to the in-plane optical properties. Laser-based engineering of optical properties through controlling transient electron dynamics expands the functionality of MoS2 and has potential applications in direction-dependent optoelectronic devices. |
| تدمد: | 1432-0630 0947-8396 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::1e885f31a86f2a131c90bd6f64ddbc7e https://doi.org/10.1007/s00339-017-1077-0 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........1e885f31a86f2a131c90bd6f64ddbc7e |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 14320630 09478396 |
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