论文标题
迈向手性大声乳清
Towards chiral acoustoplasmonics
论文作者
论文摘要
创建和操纵纳米结构材料的可能性鼓励探索控制电磁特性的新策略。最吸引人的纳米结构是对螺旋极化的反应不同的纳米结构，即表现出手性。在这里，我们提出了一个基于交叉拉长条的简单结构，轻度手工定义了主导的横截面吸收或散射，与其对应物（散射或吸收）相差200％。提出的手性系统为增强相干的声子激发和检测开辟了道路。从理论上讲，我们提出了使用圆极化光的简单连贯的声子生成（时间分辨的布里渊散射）实验。在报道的结构中，通过最大化吸收来优化声音子的产生，而通过工程散射特性，在相同波长和不同的螺旋性下增强了检测。提出的结果构成了在高效和多功能大声质传感器的设计和优化中收获手性效应的第一步之一。
The possibility of creating and manipulating nanostructured materials encouraged the exploration of new strategies to control electromagnetic properties. Among the most intriguing nanostructures are those that respond differently to helical polarization, i.e., exhibit chirality. Here, we present a simple structure based on crossed elongated bars where light-handedness defines the dominating cross-section absorption or scattering, with a 200% difference from its counterpart (scattering or absorption). The proposed chiral system opens the way to enhanced coherent phonon excitation and detection. We theoretically propose a simple coherent phonon generation (time-resolved Brillouin scattering) experiment using circularly polarized light. In the reported structures, the generation of acoustic phonons is optimized by maximizing the absorption, while the detection is enhanced at the same wavelength -- and different helicity -- by engineering the scattering properties. The presented results constitute one of the first steps towards harvesting chirality effects in the design and optimization of efficient and versatile acoustoplasmonic transducers.
