Abstract
We utilize cavity-enhanced extinction spectroscopy to directly quantify the optical absorption of defects in MoS2 generated by helium ion bombardment. We achieve hyperspectral imaging of specific defect patterns with a detection limit below 0.01% extinction, corresponding to a detectable defect density below 1 x 10(11) cm(-2). The corresponding spectra reveal a broad subgap absorption, being consistent with theoretical predictions related to sulfur vacancy-bound excitons in MoS2. Our results highlight cavity-enhanced extinction spectroscopy as efficient means for the detection of optical transitions in nanoscale thin films with weak absorption, applicable to a broad range of materials.
Item Type: | Journal article |
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Faculties: | Physics |
Subjects: | 500 Science > 530 Physics |
ISSN: | 1948-7185 |
Language: | English |
Item ID: | 115443 |
Date Deposited: | 02. Apr 2024, 08:14 |
Last Modified: | 02. Apr 2024, 08:14 |
DFG: | Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390776260 |
DFG: | Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 390814868 |
DFG: | Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 422707584 |