Electrically driven programmable phase-change meta-switch reaching 80% efficiency

التفاصيل البيبلوغرافية
العنوان: Electrically driven programmable phase-change meta-switch reaching 80% efficiency
المؤلفون: Abdollahramezani, Sajjad, Hemmatyar, Omid, Taghinejad, Mohammad, Taghinejad, Hossein, Krasnok, Alex, Eftekhar, Ali A., Teichrib, Christian, Deshmukh, Sanchit, El-Sayed, Mostafa, Pop, Eric, Wuttig, Matthias, Alu, Andrea, Cai, Wenshan, Adibi, Ali
سنة النشر: 2021
المجموعة: Physics (Other)
مصطلحات موضوعية: Physics - Optics, Physics - Applied Physics
الوصف: Despite recent advances in active metaoptics, wide dynamic range combined with high-speed reconfigurable solutions is still elusive. Phase-change materials (PCMs) offer a compelling platform for metasurface optical elements, owing to the large index contrast and fast yet stable phase transition properties. Here, we experimentally demonstrate an in situ electrically-driven reprogrammable metasurface by harnessing the unique properties of a phase-change chalcogenide alloy, Ge$_{2}$Sb$_{2}$Te$_{5}$ (GST), in order to realize fast, non-volatile, reversible, multilevel, and pronounced optical modulation in the near-infrared spectral range. Co-optimized through a multiphysics analysis, we integrate an efficient heterostructure resistive microheater that indirectly heats and transforms the embedded GST film without compromising the optical performance of the metasurface even after several reversible phase transitions. A hybrid plasmonic-PCM meta-switch with a record electrical modulation of the reflectance over eleven-fold (an absolute reflectance contrast reaching 80%), unprecedented quasi-continuous spectral tuning over 250 nm, and switching speed that can potentially reach a few kHz is presented. Our work represents a significant step towards the development of fully integrable dynamic metasurfaces and their potential for beamforming applications.
نوع الوثيقة: Working Paper
DOI: 10.1038/s41467-022-29374-6
URL الوصول: http://arxiv.org/abs/2104.10381
رقم الأكسشن: edsarx.2104.10381
قاعدة البيانات: arXiv
الوصف
DOI:10.1038/s41467-022-29374-6