Scholarlink

<p>We investigate light–matter coupling in planar metal–dielectric architectures using open cavity (OC), full cavity (FC), and multi-cavity (MC) configurations. Surface plasmon resonance (SPR) reflection spectra were measured in the Kretschmann geometry with Rhodamine B (RhB) as the excitonic medium. Unlike previous reports that mainly emphasized plasmon–exciton interactions, this work directly compares plasmon– and photon–exciton coupling across multiple geometries, highlighting mode- and polarisation-dependent behaviours. The OC structure exhibited plasmon–exciton coupling, while FC and MC supported photon–exciton modes. Rabi splitting was strongly influenced by polarisation, dye–metal separation, and oscillator strength. In OC, RhB positioned close to the metal reduced the effective dipole moment, leading to an ~ 18% decrease in splitting. In FC, s-polarised modes showed negligible coupling at 100&#xa0;nm dye thickness but splitting increased when RhB was near the metal, whereas p-polarised modes exhibited a significant reduction. MC structures revealed tunable splitting with a ~ 26% polarisation-dependent decrease attributed to field dilution. A critical dye thickness of ~ 50–100&#xa0;nm marked a transition in coupling efficiency, and oscillator strength enhanced splitting until saturation. These results provide design strategies for tunable, polarisation-sensitive polaritonic devices such as sensors and low-threshold nano lasers.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Surface Plasmon Mediated Tunable Rabi Splitting for Polarisation Sensitive Optical Devices

  • 期刊论文

  • 发表日期：

    2025年11月19日

查看全文
  • Ajeesh P Vijayan,
  • Pradeesh Kannan

摘要

We investigate light–matter coupling in planar metal–dielectric architectures using open cavity (OC), full cavity (FC), and multi-cavity (MC) configurations. Surface plasmon resonance (SPR) reflection spectra were measured in the Kretschmann geometry with Rhodamine B (RhB) as the excitonic medium. Unlike previous reports that mainly emphasized plasmon–exciton interactions, this work directly compares plasmon– and photon–exciton coupling across multiple geometries, highlighting mode- and polarisation-dependent behaviours. The OC structure exhibited plasmon–exciton coupling, while FC and MC supported photon–exciton modes. Rabi splitting was strongly influenced by polarisation, dye–metal separation, and oscillator strength. In OC, RhB positioned close to the metal reduced the effective dipole moment, leading to an ~ 18% decrease in splitting. In FC, s-polarised modes showed negligible coupling at 100 nm dye thickness but splitting increased when RhB was near the metal, whereas p-polarised modes exhibited a significant reduction. MC structures revealed tunable splitting with a ~ 26% polarisation-dependent decrease attributed to field dilution. A critical dye thickness of ~ 50–100 nm marked a transition in coupling efficiency, and oscillator strength enhanced splitting until saturation. These results provide design strategies for tunable, polarisation-sensitive polaritonic devices such as sensors and low-threshold nano lasers.