Strongly confined mid-infrared to terahertz phonon polaritons in ultrathin SrTiO

Peiyi He, Jiade Li, Cong Li, Ning Li, Bo Han, Ruochen Shi, Ruishi Qi, Jinlong Du, Pu Yu, Peng Gao

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Article in Science advances, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

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10 authors.

Peiyi HeInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.ORCID 0009-0008-5278-8705

Jiade LiInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.ORCID 0009-0001-1567-3393

Cong LiState Key Laboratory of Low-Dimensional Quantum Physics, Frontier Science Center for Quantum Information, and Department of Physics, Tsinghua University, Beijing 100871, China.

Ning LiInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.

Bo HanInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.

Ruochen ShiInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.ORCID 0000-0003-3756-7038

Ruishi QiDepartment of Physics, University of California, Berkeley, Berkeley, CA 94720, USA.ORCID 0009-0000-1305-1104

Jinlong DuElectron Microscopy Laboratory, School of Physics, Peking University, Beijing 100871, China.

Pu YuState Key Laboratory of Low-Dimensional Quantum Physics, Frontier Science Center for Quantum Information, and Department of Physics, Tsinghua University, Beijing 100871, China.ORCID 0000-0002-5513-7632

Peng GaoInternational Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, China.ORCID 0000-0003-0860-5525

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Phonon polaritons (PhPs) enable subwavelength light control for infrared sensing, imaging, and optoelectronics, but conventional polar materials have narrow Reststrahlen bands, limiting applications. Materials that support PhPs with broad spectral range, strong field confinement, slow group velocity, and high-quality factor are therefore needed. Here, using monochromatic electron energy loss spectroscopy in a scanning transmission electron microscope, we demonstrate that ultrathin SrTiO

Identifiers

PMID41259531

DOI10.1126/sciadv.ady7316

PMCPMC12629183

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