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Waveguide-Coupled Light Photodetector Based on Two-Dimensional Molybdenum Disulfide
Autorzy
Rok wydania
2024
Czasopismo
ACS Applied Materials and Interfaces
Numer woluminu
16
Strony
28874-28885
DOI
10.1021/acsami.4c04854
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
The integration of transition metal dichalcogenides with photonic structures such as sol–gel SiOx:TiOy optical waveguides (WGs) makes possible the fabrication of photonic devices with the desired characteristics in the visible spectral range. In this study, we propose and experimentally demonstrate a MoS2-based photodetector integrated with a sol–gel SiOx:TiOy WG. Based on the spectroscopic measurements performed for our device, we concluded that the light entering the WG is almost completely channeled out from the WG and absorbed by the MoS2 flake, which is deposited on the WG. Therefore, this device works as a photodetector. The light coupling into the MoS2 region in this device construction is due to the high contrast of refractive index between the van der Waals crystal and the sol–gel WG, which is ∼4 and ∼1.8, respectively. The obtained MoS2-based photodetectors exhibit a photoresponsivity of 0.3 A W−1 (n-type MoS2) and 7.53 mA W−1 (p-type MoS2) at a bias voltage of 2 V. These results reveal great potential in the integration of sol–gel WGs with van der Waals crystals in optoelectronic applications.
Słowa kluczowe
MoS2, doped two-dimensional materials, photodetector, mechanical exfoliation, transition metal dichalcogenides, optical waveguide, sol–gel, Layers, Light, Oxides, Sensors, Thickness
Licencja otwartego dostępu
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Pełny tekst licencji: https://creativecommons.org/licenses/by/3.0/pl/legalcode
Adres publiczny
http://dx.doi.org/10.1021/acsami.4c04854
Strona internetowa wydawcy
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