基于受连续体中束缚态支配的垂直偶极子的强局域纳米激光器

IF 2.2 3区物理与天体物理 Q2 OPTICS

Optics Communications Pub Date : 2024-10-28 DOI:10.1016/j.optcom.2024.131255

YanYan Huo , Yuqian Zhang , Xinyu Liu , Tingyin Ning , Yingying Ren

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引用次数: 0

摘要

超小模式体积和强局部场对于纳米激光器的微型化和性能提升至关重要。在这里，我们展示了一种基于垂直偶极子共振的纳米激光器，该共振耦合到银镜上纳米柱周期性阵列的镜面上，受连续体中对称保护束缚态（BIC）的支配，具有极小的模式体积和高场增强。利用这种垂直偶极子，可以探索出一种局部场尺寸仅为 ∼λ/300 （其中 λ 为谐振波长）的纳米激光器。与不带银镜的垂直偶极纳米激光器相比，有效模式体积可减少一个数量级，阈值可从 5.85 μJ/mm2 降至 0.337 μJ/mm2。此外，通过进一步研究入射光的角度，我们还可以调整纳米激光器的阈值。当入射角从 9° 调整到 1° 时，阈值可从 1.43 μJ/mm2 降至 0.299 μJ/mm2。

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Strongly localized nanolaser based on the vertical dipole governed by bound states in the continuum

Ultrasmall mode volumes and strongly localized fields are crucial for the miniaturization and performance enhancement of nanolasers. Here, we demonstrate a nanolaser based on a vertical dipole resonance coupled to its mirror in a periodic array of nanopillars on an Ag mirror, governed by symmetry-protected bound states in the continuum (BICs), which possess extremely small mode volumes and high field enhancement. A nanolaser with a strongly localized field size of only ∼λ/300 (where λ is the resonant wavelength) can be explored by using this vertical dipole. Compared to a vertical dipole nanolaser without a silver mirror, the effective mode volume can be reduced by an order of magnitude, and the threshold can decrease from 5.85 to 0.337 μJ/mm². Additionally, by controlling further investigated the angle of the incident light, we can also adjust the threshold of the nanolaser. When the incidence angle is adjusted from 9° to 1°, the threshold can be reduced from 1.43 to 0.299 μJ/mm².

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来源期刊

Optics Communications 物理-光学

CiteScore

5.10

自引率

8.30%

发文量

681

审稿时长

38 days

期刊介绍： Optics Communications invites original and timely contributions containing new results in various fields of optics and photonics. The journal considers theoretical and experimental research in areas ranging from the fundamental properties of light to technological applications. Topics covered include classical and quantum optics, optical physics and light-matter interactions, lasers, imaging, guided-wave optics and optical information processing. Manuscripts should offer clear evidence of novelty and significance. Papers concentrating on mathematical and computational issues, with limited connection to optics, are not suitable for publication in the Journal. Similarly, small technical advances, or papers concerned only with engineering applications or issues of materials science fall outside the journal scope.