تقرير
Laser-patterned submicron Bi2Se3-WS2 pixels with tunable circular polarization at room temperature
| العنوان: | Laser-patterned submicron Bi2Se3-WS2 pixels with tunable circular polarization at room temperature |
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| المؤلفون: | Hennighausen, Zachariah, Wickramaratne, Darshana, McCreary, Kathleen M., Hudak, Bethany M., Brintlinger, Todd, Chuang, Hsun-Jen, Noyan, Mehmet A., Jonker, Berend T., Stroud, Rhonda M., Erve, Olaf M. vant |
| سنة النشر: | 2022 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Applied Physics, Physics - Chemical Physics, Physics - Optics |
| الوصف: | Characterizing and manipulating the circular polarization of light is central to numerous emerging technologies, including spintronics and quantum computing. Separately, monolayer tungsten disulfide (WS2) is a versatile material that has demonstrated promise in a variety of applications, including single photon emitters and valleytronics. Here, we demonstrate a method to tune the photoluminescence (PL) intensity (factor of x161), peak position (38.4meV range), circular polarization (39.4% range), and valley polarization of a Bi2Se3-WS2 2D heterostructure using a low-power laser (0.762uW) in ambient. Changes are spatially confined to the laser spot, enabling submicron (814nm) features, and are long-term stable (>334 days). PL and valley polarization changes can be controllably reversed through laser exposure in vacuum, allowing the material to be erased and reused. Atmospheric experiments and first-principles calculations indicate oxygen diffusion modulates the exciton radiative vs. non-radiative recombination pathways, where oxygen absorption leads to brightening, and desorption to darkening. Comment: Published: ACS Appl. Mater. Interfaces 2022 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1021/acsami.1c24205 |
| URL الوصول: | http://arxiv.org/abs/2202.07495 |
| رقم الأكسشن: | edsarx.2202.07495 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1021/acsami.1c24205 |
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