Scholarlink

<p>While most approaches to polariton research focus on achieving strong coupling between excitons in monolayer transition metal dichalcogenides (TMDCs) and external microcavities, bulk TMDCs have been largely overlooked due to their reduced exciton oscillator strength and indirect bandgap nature. Here, we report the observation of polariton condensation within the indirect-transition range, enabled by a condensation mechanism in 50-nm-thick WS₂-based bound state in the continuum (BIC) cavities. Our photonic-like BIC polaritons exhibit a significant Rabi splitting energy ( ~ 294 meV) and clear evidence of condensation driven by a mechanism involving <i>indirect excitons</i> that directly inject photons into BIC polaritons. Remarkably, the interaction-induced confinement of polariton condensates can be optically tuned by adjusting the pump laser size, despite a minimal exciton fraction of 6%, distinguishing this system from purely photonic counterparts. These findings open new avenues for exploring polariton physics with <i>indirect excitons</i> in TMDCs and other emerging materials.</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

Polariton condensate far-detuned from exciton resonance in WS2 bound states in the continuum

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月16日

查看全文
  • Junghyun Sung,
  • Joohoon Kim,
  • Ho Seung Lee,
  • Woo Hun Choi,
  • Minsu Jeong,
  • Jihae Lee,
  • Seokwoo Kim,
  • Dong-Jin Shin,
  • Daegwang Choi,
  • Junsuk Rho,
  • Su-Hyun Gong,
  • Hyun Gyu Song

摘要

While most approaches to polariton research focus on achieving strong coupling between excitons in monolayer transition metal dichalcogenides (TMDCs) and external microcavities, bulk TMDCs have been largely overlooked due to their reduced exciton oscillator strength and indirect bandgap nature. Here, we report the observation of polariton condensation within the indirect-transition range, enabled by a condensation mechanism in 50-nm-thick WS₂-based bound state in the continuum (BIC) cavities. Our photonic-like BIC polaritons exhibit a significant Rabi splitting energy ( ~ 294 meV) and clear evidence of condensation driven by a mechanism involving indirect excitons that directly inject photons into BIC polaritons. Remarkably, the interaction-induced confinement of polariton condensates can be optically tuned by adjusting the pump laser size, despite a minimal exciton fraction of 6%, distinguishing this system from purely photonic counterparts. These findings open new avenues for exploring polariton physics with indirect excitons in TMDCs and other emerging materials.