Scholarlink

<p>We report frequency generation by four-wave mixing in thin-film barium titanate (BTO) microring resonators. From the generated idler powers, we determined the nonlinear refractive index of the BTO thin film to be <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(n_2 = 1.4 \times 10^{-18}\)</EquationSource> </InlineEquation> <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\text {m}^2\)</EquationSource> </InlineEquation>/W, in close agreement with previously reported value using photothermal spectroscopy. This value is an order of magnitude larger than the Kerr effect in thin-film lithium niobate and only slightly less than silicon, without the nonlinear loss due to free carrier absorption in the latter. These results suggest that BTO-on-insulator is a promising integrated photonic material for nonlinear and quantum applications such as generation of frequency combs, entangled photon pairs and squeezed light.</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

Frequency generation by four-wave mixing in barium titanate-on-insulator microring resonators

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月12日

查看全文
  • Robin Kim,
  • Runtong Zhen,
  • Vien Van

摘要

We report frequency generation by four-wave mixing in thin-film barium titanate (BTO) microring resonators. From the generated idler powers, we determined the nonlinear refractive index of the BTO thin film to be \(n_2 = 1.4 \times 10^{-18}\) \(\text {m}^2\) /W, in close agreement with previously reported value using photothermal spectroscopy. This value is an order of magnitude larger than the Kerr effect in thin-film lithium niobate and only slightly less than silicon, without the nonlinear loss due to free carrier absorption in the latter. These results suggest that BTO-on-insulator is a promising integrated photonic material for nonlinear and quantum applications such as generation of frequency combs, entangled photon pairs and squeezed light.