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(xiàn)(27)相關(guān)文章 (15) 全文: PDF (1186 KB) HTML (1 KB) 導(dǎo)出: BibTeX | EndNote (RIS) Supporting Info摘要： 液晶空間光調(diào)制器能夠方便地用于制作各種衍射型光學(xué)元件, 但液晶空間光調(diào)制器存在分辨率有限的缺點(diǎn), 本文提出了用液晶空間光調(diào)制器制作相位型光柵, 產(chǎn)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(shè)計(jì)光柵的相位分布, 在不改變空間光調(diào)制器硬件參數(shù)設(shè)置的情況下, 充分利用和發(fā)掘了空間光調(diào)制器的優(yōu)點(diǎn), 同時(shí)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(diào)制器的技術(shù)參數(shù), 模擬仿真設(shè)計(jì)光柵, 計(jì)算光強(qiáng)分布, 結(jié)果表明: 用大失諧、小功率激光照明, 能夠產(chǎn)生具有很高峰值光強(qiáng)和光強(qiáng)梯度的光阱陣列, 冷原子的光學(xué)偶極勢達(dá)到mK量級, 對原子的作用力遠(yuǎn)大于原子的重力.關(guān)鍵詞： 原子光學(xué) 光阱陣列 空間光調(diào)制器 服務(wù)把本文推薦給朋友加入引用管理器 AlertRSS作者相關(guān)文章顧宋博徐淑武陸俊發(fā)紀(jì)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(xué)重點(diǎn)基金(批準(zhǔn)號: 11034002), 量子調(diào)控重大研究計(jì)劃項(xiàng)目(批準(zhǔn)號: 2011CB921602), 華東師范大學(xué)精密光譜科學(xué)與技術(shù)國家重點(diǎn)實(shí)驗(yàn)室開放基金和江蘇省自然科學(xué)基金(批準(zhǔn)號: BK2008183)資助的課題.
會員1.png)