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arXiv 2304.09522physics.optics
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基于光子晶体腔的光力学诱导光捕获系统

Optomechanically induced optical trapping system based on photonic crystal cavities

Manuel Monterrosas-Romero, Seyed K. Alavi, Ester M. Koistinen, Sungkun Hong

AI总结:

本研究提出基于电介质光子晶体纳米束腔的新型光阱,利用光力学反作用突破传统光阱衍射极限等局限,数值模拟验证其可实现56nm窄阱宽的亚微米颗粒悬浮,光吸收较传统光镊降43倍,还可构建亚衍射极限动态势场,为精密传感和量子实验提供新途径。

摘要:

光捕获已被证实是一种可精确操控小型电介质物体的实用实验技术。但受其固有特性限制,传统光阱存在衍射极限,且需要极高光强才能束缚电介质物体。本研究提出了一种基于电介质光子晶体纳米束腔的新型光阱,可大幅突破传统光阱的上述局限,其原理是利用电介质纳米颗粒与腔体之间的光力学诱导反作用机制。我们通过数值模拟验证,该光阱可完全悬浮亚微米尺度的电介质颗粒,阱宽窄至56 nm;它能实现较高的光阱刚度,因此颗粒运动的Q值-频率乘积较高,同时与传统光镊相比,光吸收降低了43倍。此外,研究表明还可利用多激光频率生成特征尺寸远低于衍射极限的复杂动态势场。该光捕获系统为基于悬浮颗粒的精密传感和基础量子实验提供了新的可能。

英文摘要:

Optical trapping has proven to be a valuable experimental technique for precisely controlling small dielectric objects. However, due to their very nature, conventional optical traps are diffraction limited and require high intensities to confine the dielectric objects. In this work, we propose a novel optical trap based on dielectric photonic crystal nanobeam cavities, which overcomes the limitations of conventional optical traps by significant factors. This is achieved by exploiting an optomechanically induced backaction mechanism between a dielectric nanoparticle and the cavities. We perform numerical simulations to show that our trap can fully levitate a submicron-scale dielectric particle with a trap width as narrow as 56 nm. It allows for achieving a high trap stiffness, therefore, a high Q-frequency product for the particle's motion while reducing the optical absorption by a factor of 43 compared to the cases for conventional optical tweezers. Moreover, we show that multiple laser tones can be used further to create a complex, dynamic potential landscape with feature sizes well below the diffraction limit. The presented optical trapping system offers new opportunities for precision sensing and fundamental quantum experiments based on levitated particles.

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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