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説明:

Polaritons in van-der-Waals materials (vdWMs) promise high confinement and multiple tailoring options by resonators and launching structures which conventionally require cumbersome lithography techniques. Optical programming of phase-change materials (PCMs) offers fast and reconfigurable fabrication of these structures. As the plasmonic PCM In3SbTe2 can be switched between a dielectric and metallic phase, In3SbTe2 is promising for optical programming of metallic launching structures to tailor and confine polaritons in vdWMs. Here, we combine the vdWM hexagonal boron nitride (hBN) with In3SbTe2 and optically program circular resonators for hBN’s phonon polaritons into In3SbTe2. We investigate the polariton resonators with near-field optical microscopy. Demonstrating the reconfigurability, we decrease the resonator diameter to increase the confinement up to λ/39 and achieve a quality factor of 72. Finally, we fabricate a focusing structure for hBN’s polaritons whose focal point we reconfigure. We promote In3SbTe2 as a versatile platform for rapid prototyping of polariton optics in vdWMs.

権利情報:

• In Copyright
  

  This document is the Accepted Manuscript version of a Published Article that appeared in final form in Nano Letters, copyright © 2025 American Chemical Society. To access the final published article see https://doi.org/10.1021/acs.nanolett.5c03325.

キーワード: Phonon polaritons, Hexagonal boron nitride (hBN), Phase-change materials (PCM)

刊行年月日: 2025-11-05

出版者: American Chemical Society (ACS)

掲載誌:

• Nano Letters (ISSN: 15306984) vol. 25 issue. 44 p. 15809-15816

研究助成金:

• Ministry of Education, Culture, Sports, Science and Technology
• RWTH Aachen University
• Deutsche Forschungsgemeinschaft 471733165
• Deutsche Forschungsgemeinschaft EXC 2004/1-390534769
• Deutsche Forschungsgemeinschaft SFB 917 - 518913417
• Japan Society for the Promotion of Science 20H00354
• Japan Society for the Promotion of Science 23H02052
• Horizon 2020 Framework Programme 881603

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI:

公開URL: https://doi.org/10.1021/acs.nanolett.5c03325

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更新時刻: 2026-06-25 14:05:17 +0900

MDRでの公開時刻: 2026-10-23 03:00:00 +0900