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arXiv 1803.01992physics.optics
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束缚态驱动的全介质有源光子学

All-dielectric active photonics driven by bound states in the continuum

Song Han, Longqing Cong, Yogesh Kumar Srivastava, Bo Qiang, Mikhail V. Rybin, Wen Xiang Lim, Qijie Wang, Yuri S. Kivshar, Ranjan Singh

摘要:

最近出现的介质谐振器和超表面提供了一个低损耗的平台,有效地操纵电磁波从微波到可见光。这种平坦的超光学器件可以聚焦电磁波,生成结构化的波束和涡流,增强用于感测的局部场,以及为先进的MRI机器提供附加功能。最近的进展是与奇异的光学模式称为束缚态的连续,它可以引起极大的品质因数和超腔激光。在这里,我们实验证明了亚波长有源超腔具有极高的Q谐振,可以在超快的时间尺度重新配置。我们发现,这样的超腔使全光开关和调制非常尖锐的共振,因此可以有许多应用在激光,模式复用和生物传感。

英文摘要:

Recently emerged dielectric resonators and metasurfaces offer a low-loss platform for efficient manipulation of electromagnetic waves from microwave to visible. Such flat meta-optics can focus electromagnetic waves, generate structured beams and vortices, enhance local fields for sensing as well as provide additional functionalities for advanced MRI machinery. Recent advances are associated with exotic optical modes called bound states in the continuum, which can give rise to extremely large quality factors and supercavity lasing. Here, we experimentally demonstrate subwavelength active supercavities with extremely high-Q resonances that could be reconfigured at an ultrafast time scale. We reveal that such supercavities enable all-optical switching and modulation of extremely sharp resonances, and thus could have numerous applications in lasing, mode multiplexing, and biosensing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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