Observation of excitonic resonances in the second harmonic spectrum of MoS$_2$
| Autor: | Yao-Chung Tsao, Mads Lund Trolle, Thomas Garm Pedersen, Kjeld Møller Pedersen |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Range (particle radiation) Condensed Matter - Mesoscale and Nanoscale Physics Exciton Resonance FOS: Physical sciences Electronic structure Photon energy Condensed Matter Physics Measure (mathematics) Electronic Optical and Magnetic Materials Harmonic spectrum Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Atomic physics Excitation |
| Zdroj: | Trolle, M L, Tsao, Y-C, Pedersen, K & Pedersen, T G 2015, ' Observation of excitonic resonances in the second harmonic spectrum of MoS2 ', Physical Review B (Condensed Matter and Materials Physics), vol. 92, 161409 . https://doi.org/10.1103/PhysRevB.92.161409 |
| DOI: | 10.48550/arxiv.1506.08653 |
| Popis: | We measure the second-harmonic (SH) response of MoS$_2$ in a broad fundamental photon energy range between 0.85 and 1.7 eV, and present a continuous SH spectrum capturing signatures of both the fundamental A and B excitons in addition to the intense C resonance. Moreover, we interpret our results in terms of the first exciton simulation of the SH properties of multi-layered MoS$_2$ samples, represented by a study of trilayer MoS$_2$. The good agreement between theory and experiments allows us to establish a connection between the measured spectrum and the underlying electronic structure, in the process elucidating the non-linear excitation of electron-hole pairs. |
| Databáze: | OpenAIRE |
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