Scholarlink

<p>The rapidly developing field of topological photonics has the potential to revolutionize the design and operation of optical systems. This study presents a novel approach for constructing a resilient sensor based on topological resonance. The coupling of the photonic crystal waveguide (PCW) with the topological corner state (TCS) within the structure forms the proposed sensor. The PCW provides a well-defined propagating mode, while the TCS is a localized mode that is topologically protected against perturbations. The coupling between the two modes contributes growth to a Fano resonance and results in a sharp and narrow spectral feature sensitive to the refractive index variation of the surrounding medium. The proposed sensor possesses a high sensitivity of ∼461.96 nm/RIU with a high Q-factor <InlineEquation ID="IEq2"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_8016_Article_IEq2.gif" Format="GIF" Height="20" Rendition="HTML" Resolution="72" Type="Linedraw" Width="58" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:(\:&gt;{10}^{6})\)</EquationSource> </InlineEquation>, high figure of merit <InlineEquation ID="IEq3"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_8016_Article_IEq3.gif" Format="GIF" Height="21" Rendition="HTML" Resolution="72" Type="Linedraw" Width="108" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:\:(\:&gt;{10}^{6}\:{\text{R}\text{I}\text{U}}^{-1})\)</EquationSource> </InlineEquation>, and has an ideal detection limit value of<InlineEquation ID="IEq4"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="11082_2024_8016_Article_IEq4.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="68" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:\:{10}^{-7}\:\text{R}\text{I}\text{U}\)</EquationSource> </InlineEquation>. The present study gives a new platform for a more productive way of creating highly efficient topological Fano resonance sensors. The proposed sensor is resistant, sensitive, and highly versatile, making it beneficial for different applications.</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

Fano resonance-boosted topological sensor for next-generation sensing

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年1月22日

查看全文
  • Zeinelabedin A. Mohamed,
  • Alaa M. Abd-Elnaiem,
  • Israa Abood,
  • Mohamed Almokhtar,
  • Sayed El. Soliman

摘要

The rapidly developing field of topological photonics has the potential to revolutionize the design and operation of optical systems. This study presents a novel approach for constructing a resilient sensor based on topological resonance. The coupling of the photonic crystal waveguide (PCW) with the topological corner state (TCS) within the structure forms the proposed sensor. The PCW provides a well-defined propagating mode, while the TCS is a localized mode that is topologically protected against perturbations. The coupling between the two modes contributes growth to a Fano resonance and results in a sharp and narrow spectral feature sensitive to the refractive index variation of the surrounding medium. The proposed sensor possesses a high sensitivity of ∼461.96 nm/RIU with a high Q-factor \(\:(\:>{10}^{6})\) , high figure of merit \(\:\:(\:>{10}^{6}\:{\text{R}\text{I}\text{U}}^{-1})\) , and has an ideal detection limit value of \(\:\:{10}^{-7}\:\text{R}\text{I}\text{U}\) . The present study gives a new platform for a more productive way of creating highly efficient topological Fano resonance sensors. The proposed sensor is resistant, sensitive, and highly versatile, making it beneficial for different applications.