Projekteja vuodessa
Abstrakti
Mixed-dimensional heterostructures combine the merits of materials of different dimensions; therefore, they represent an advantageous scenario for numerous technological advances. Such an approach can be exploited to tune the physical properties of two-dimensional (2D) layered materials to create unprecedented possibilities for anisotropic and high-performance photonic and optoelectronic devices. Here, we report a new strategy to engineer the light-matter interaction and symmetry of monolayer MoS2 by integrating it with one-dimensional (1D) AlGaAs nanowire (NW). Our results show that the photoluminescence (PL) intensity of MoS2 increases strongly in the mixed-dimensional structure because of electromagnetic field confinement in the 1D high refractive index semiconducting NW. Interestingly, the 1D NW breaks the 3-fold rotational symmetry of MoS2, which leads to a strong optical anisotropy of up to ∼60%. Our mixed-dimensional heterostructure-based phototransistors benefit from this and exhibit an improved optoelectronic device performance with marked anisotropic photoresponse behavior. Compared with bare MoS2 devices, our MoS2/NW devices show ∼5 times enhanced detectivity and ∼3 times higher photoresponsivity. Our results of engineering light-matter interaction and symmetry breaking provide a simple route to induce enhanced and anisotropic functionalities in 2D materials.
Alkuperäiskieli | Englanti |
---|---|
Sivut | 31140–31147 |
Sivumäärä | 8 |
Julkaisu | ACS applied materials & interfaces |
Vuosikerta | 14 |
Numero | 27 |
DOI - pysyväislinkit | |
Tila | Julkaistu - 13 heinäk. 2022 |
OKM-julkaisutyyppi | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä |
Sormenjälki
Sukella tutkimusaiheisiin 'Inducing Strong Light-Matter Coupling and Optical Anisotropy in Monolayer MoS2 with High Refractive Index Nanowire'. Ne muodostavat yhdessä ainutlaatuisen sormenjäljen.-
FEMTOCHIP: FEMTOSECOND LASER ON A CHIP
Sun, Z., Li, D., Liu, P., Turunen, M., Das, S., Mohsen, A., Liapis, A. & Atalaia Rosa, J.
01/03/2021 → 29/02/2024
Projekti: EU: Framework programmes funding
-
FAST: Ultrafast Data Production with Broadband Photodetectors for Active Hyperspectral Space Imaging
Sun, Z., Akkanen, S., Pajunpää, T., Cui, L., Nigmatulin, F. & Das, S.
01/01/2021 → 31/12/2023
Projekti: Academy of Finland: Other research funding
-
NOIMO: Novel optical isolators to continue Moore's law in photonics integration
01/09/2020 → 31/08/2024
Projekti: Academy of Finland: Other research funding