Raman lasers are an actively developing field of nonlinear optics aiming to create efficient frequency converters and various optical sensors. Due to the growing importance of ultracompact chip‐scale technologies, there is a constant demand for optical device miniaturization; however, the development of a nanoscale Raman laser remains a challenging endeavor. In this work, a fully subwavelength Raman laser operating in visible range is proposed, based on a gallium phosphide nanocylinder resonator supporting a quasi‐bound state in the continuum (quasi‐BIC). The precise spectral matching of the nanoparticle high‐Q modes is performed with the pump and detuned Raman emission wavelengths. The simulations demonstrate an experiment‐ready design of Raman nanolaser with a lasing threshold expected to be as low as . The proposed configuration represents the prototype of a low‐threshold Raman nanolaser with all dimensions smaller than the operational wavelength.

中文翻译：

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连续体中准束缚态驱动的亚波长拉曼激光器

拉曼激光器是一个积极发展的非线性光学领域，旨在创建高效的变频器和各种光学传感器。由于超紧凑芯片级技术的重要性日益增加，对光学器件小型化的需求不断增加；然而，纳米级拉曼激光器的开发仍然是一项具有挑战性的工作。在这项工作中，提出了一种在可见光范围内工作的全亚波长拉曼激光器，基于支持连续体中准束缚态（准BIC）的磷化镓纳米圆柱谐振器。纳米颗粒高光谱精确匹配问模式是通过泵浦和失谐拉曼发射波长来执行的。模拟展示了拉曼纳米激光器的实验就绪设计，其激光阈值预计低至。所提出的配置代表了所有尺寸均小于工作波长的低阈值拉曼纳米激光器的原型。