| 用液晶空間光調制器產生光阱陣列 |
| 顧宋博1, 徐淑武1 2, 陸俊發(fā)2 3, 紀憲明1, 印建平2 |
| 1. 南通大學電子信息學院理學院, 南通 226007; 2. 華東師范大學精密光譜科學與技術國家重點實驗室, 上海 200062; 3. 東華理工大學物理系, 撫州 344000 |
| Generation of the array of optical traps by liquid crystal spatial light modulator |
| Gu Song-Bo1, Xu Shu-Wu1 2, Lu Jun-Fa2 3, Ji Xian-Ming1, Yin Jian-Ping2 |
| 1. Science College, Nantong University, Nantong 226007, China; 2. State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China; 3. Department of Physics, East China Institute of Technology, Fuzhou 344000, China |
| 摘要參考文獻(27)相關文章 (15) 全文: PDF (1186 KB) HTML (1 KB) 導出: BibTeX | EndNote (RIS) Supporting Info摘要： 液晶空間光調制器能夠方便地用于制作各種衍射型光學元件, 但液晶空間光調制器存在分辨率有限的缺點, 本文提出了用液晶空間光調制器制作相位型光柵, 產生一維和二維光阱陣列的新方案, 用迭代傅里葉級數(shù)算法優(yōu)化設計光柵的相位分布, 在不改變空間光調制器硬件參數(shù)設置的情況下, 充分利用和發(fā)掘了空間光調制器的優(yōu)點, 同時又能較好地回避其所存在的缺陷. 根據(jù)現(xiàn)有的空間光調制器的技術參數(shù), 模擬仿真設計光柵, 計算光強分布, 結果表明: 用大失諧、小功率激光照明, 能夠產生具有很高峰值光強和光強梯度的光阱陣列, 冷原子的光學偶極勢達到mK量級, 對原子的作用力遠大于原子的重力.關鍵詞： 原子光學 光阱陣列 空間光調制器 服務把本文推薦給朋友加入引用管理器 AlertRSS作者相關文章顧宋博徐淑武陸俊發(fā)紀憲明印建平Abstract： Liquid crystal spatial light modulator (LC-SLM) can be readily used to fabricate the diffractive optical elements. However, a disadvantage of the finite resolution always exists in LC-SLM. In this paper, a new scheme of fabricating phase grating with LC-SLM is proposed to produce one-dimensional (1D) and two-dimensional (2D) array of optical traps. The advantage of the LC-SLM is fully utilized and the disadvantage is well avoided in our scheme. The phase distribution of the grating is optimized by using iterative Fourier series expansion. The grating is designed by simulation according to the LC-SLM technique parameters, and the corresponding light intensity distribution is calculated. The results show that the array has very high peak value intensity and big gradient of intensity by illuminating the grating with a large detuning and low power laser. The optical dipole potential of trapping cold atoms achieves the order of mK, and the interaction force between atom and optical field is much greater than the atom gravity. Keywords： atomic optics array of optical traps spatial light modulator 收稿日期: 2011-11-07PACS: 37.10.Gh (Atom traps and guides) 37.10.Jk (Atoms in optical lattices) 42.79.Kr (Display devices, liquid-crystal devices) 基金: 國家自然科學重點基金(批準號: ), 量子調控重大研究計劃項目(批準號: 2011CB921602), 華東師范大學精密光譜科學與技術國家重點實驗室開放基金和江蘇省自然科學基金(批準號: BK2008183)資助的課題. |
