Polarization conversion in bottom-up grown quasi-1D fibrous red phosphorus flakes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 37474534.
- Also identified by DOI 10.1038/s41467-023-40122-2 and PMC identifier 10359251.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Fibrous red phosphorus (RP) has triggered growing attention as an emerging quasi-one-dimensional (quasi-1D) van der Waals crystal recently. Unfortunately, it is difficult to achieve substrate growth of high-quality fibrous RP flakes due to their inherent quasi-1D structure, which impedes their fundamental property exploration and device integration. Herein, we demonstrate a bottom-up approach for the growth of fibrous RP flakes with (001)-preferred orientation via a chemical vapor transport (CVT) reaction in the P/Sn/I<sub>2</sub> system. The formation of fibrous RP flakes can be attributed to the synergistic effect of Sn-mediated P<sub>4</sub> partial pressure and the SnI<sub>2</sub> capping layer-directed growth. Moreover, we investigate the optical anisotropy of the as-grown flakes, demonstrating their potential application as micro phase retarders in polarization conversion. Our developed bottom-up approach lays the foundation for studying the anisotropy and device integration of fibrous red phosphorus, opening up possibilities for the two-dimensional growth of quasi-1D van der Waals materials.