Scholarlink

<p>Photoconductive antennas (PCAs) have become privileged THz emitters due to the broadband spectrum, reliability, ease in fabrication, and flexibility in design. However, commonly used single-element PCA emitters suffer from low conversion efficiency. In this paper, we report on a relatively simple and high-efficient 1D array PCA THz emitter with a judiciously designed topology comprising of only a few dipole-type PCAs. When accounting an important trade-off in the array’s period, which simultaneously impacts the laser pump efficiency and redistributes power between the main and side lobes of the THz beam, the 1D array of only seven PCAs ensures an 11-fold enhancement in the conversion efficiency (by power, over the single-element PCA) in the frequency range of <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10762_2025_1086_Article_IEq1.gif" Format="GIF" Height="14" Rendition="HTML" Resolution="72" Type="Linedraw" Width="64" /> </InlineMediaObject> <EquationSource Format="TEX">\(0.3-3.5\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0.3</mn> <mo>-</mo> <mn>3.5</mn> </mrow> </math></EquationSource> </InlineEquation>&#xa0;THz. Although the proposed 1D array PCA emitter does not provide absorption of all laser pump power, the spatial reconstruction of its THz radiation pattern, thanks to the optimized design, provides a significant increase in conversion efficiency. Moreover, the array conceptualization is technologically reliable and is much easier and miniaturized compared to conventional large-area and large-aperture PCA emitters. The results of our findings are important for the further design and scaling of the PCA technology, aimed at meeting the demands of vigorously explored THz spectroscopy, imaging, and exposure technologies.</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

Enhanced THz Emission in a Few-Element 1D Photoconductive Antenna Array

  • 期刊论文

  • 发表日期：

    2025年9月19日

查看全文
  • D. V. Lavrukhin,
  • A. E. Yachmenev,
  • R. R. Galiev,
  • D. V. Garabov,
  • R. A. Khabibullin,
  • A. Satou,
  • Yu.G. Goncharov,
  • S. V. Garnov,
  • K. I. Zaytsev,
  • D. S. Ponomarev

摘要

Photoconductive antennas (PCAs) have become privileged THz emitters due to the broadband spectrum, reliability, ease in fabrication, and flexibility in design. However, commonly used single-element PCA emitters suffer from low conversion efficiency. In this paper, we report on a relatively simple and high-efficient 1D array PCA THz emitter with a judiciously designed topology comprising of only a few dipole-type PCAs. When accounting an important trade-off in the array’s period, which simultaneously impacts the laser pump efficiency and redistributes power between the main and side lobes of the THz beam, the 1D array of only seven PCAs ensures an 11-fold enhancement in the conversion efficiency (by power, over the single-element PCA) in the frequency range of \(0.3-3.5\) 0.3 - 3.5  THz. Although the proposed 1D array PCA emitter does not provide absorption of all laser pump power, the spatial reconstruction of its THz radiation pattern, thanks to the optimized design, provides a significant increase in conversion efficiency. Moreover, the array conceptualization is technologically reliable and is much easier and miniaturized compared to conventional large-area and large-aperture PCA emitters. The results of our findings are important for the further design and scaling of the PCA technology, aimed at meeting the demands of vigorously explored THz spectroscopy, imaging, and exposure technologies.