用液晶空间光调制器产生光阱阵列

顾宋博; 徐淑武; 陆俊发; 纪宪明; 印建平

doi:10.7498/aps.61.153701

摘要

液晶空间光调制器能够方便地用于制作各种衍射型光学元件, 但液晶空间光调制器存在分辨率有限的缺点, 本文提出了用液晶空间光调制器制作相位型光栅, 产生一维和二维光阱阵列的新方案, 用迭代傅里叶级数算法优化设计光栅的相位分布, 在不改变空间光调制器硬件参数设置的情况下, 充分利用和发掘了空间光调制器的优点, 同时又能较好地回避其所存在的缺陷. 根据现有的空间光调制器的技术参数, 模拟仿真设计光栅, 计算光强分布, 结果表明: 用大失谐、小功率激光照明, 能够产生具有很高峰值光强和光强梯度的光阱阵列, 囚禁冷原子的光学偶极势达到mK量级, 对原子的作用力远大于原子的重力.

关键词:

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:

作者及机构信息

1.
南通大学电子信息学院理学院, 南通 226007;

2.
华东师范大学精密光谱科学与技术国家重点实验室, 上海 200062;

3.
东华理工大学物理系, 抚州 344000

基金项目: 国家自然科学重点基金(批准号: 11034002), 科技部量子调控重大研究计划项目(批准号: 2011CB921602), 华东师范大学精密光谱科学与技术国家重点实验室开放基金和江苏省自然科学基金(批准号: BK2008183)资助的课题.

Authors and contacts

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

Funds: Project supported by the Key Program National Natural Science Foundation of China (Grant No. 11034002), the National Key Basic Research and Development Program of China (Grant No. 2011CB921602), the Open Research Fund of State Key Laboratory of Precision Spectroscopy, East China Normal University and the Natural Science Foundation of Jiangsu Province (Grant No. BK2008183).

参考文献

[1]	Greiner M, Mandel O, Esslinger T, Hansch T W, Bloch I 2002 Nature 415 39
[2]	Raithel G, Birkl G, Kastberg A, Phillips W D, Rolston S L 1997 Phys. Rev. Lett. 78 630
[3]	Vuletic V, Chin C, Kerman A J, Chu S 1998 Phys. Rev. Lett. 81 5768
[4]	Dutta S K, Teo B K, Raithel G 1999 Phys. Rev. Lett. 83 1934
[5]	Tie L, Xue J K 2011 Chin. Phys. B 20 120311
[6]	Wang J J, Zhang A X, Xue J K 2011 Chin. Phys. B 20 080308
[7]	Grabouski A, Pfau T 2003 Eur. Phys. J. D 22 347
[8]	Folman R 2002 Adv. At. Mol. Opt. Phys. 48 263
[9]	Reichel J, Hansel W, Hommelhoff P, Hansch T W 2001 Appl. Phys. B 72 81
[10]	Grynberg G, Robilliard C 2001 Phys. Rep. 355 335
[11]	Semmler D, Wernsdorfer J, Bissbort U, Byczuk K, Hofstetter W 2010 Phys. Rev. B 82 235115
[12]	Michael Kastner 2010 Phys. Rev. Lett. 104 240403
[13]	David A, Kessler, Eli Barkai 2010 Phys. Rev. Lett. 105 120602
[14]	Yi L, Mejri S, McFerran J J, Le C Y, Bize S 2011 Phys. Rev. Lett. 106 073005
[15]	Dumke R, Volk M, Mther T, Buchkremer F B J, Birkl G, Ertmer W 2002 Phys. Rev. Lett. 89 097903
[16]	Ji X M, Lu J F, Mu R W, Yin J P 2006 Acta. Phys Sin. 55 3396 (in Chinses) [纪宪明, 陆俊发, 沐仁旺, 印建平 2006 55 3396]
[17]	Gabriel M, David E, Jörgen B 2007 Appl. Opt. 46 95
[18]	Lu J F, Zhou Q, Ji X M, Yin J P 2011 Acta. Phys. Sin. 60 063701 (in Chinses) [陆俊发, 周琦, 纪宪明, 印建平 2011 60 063701]
[19]	Qi X Q, Gao C Q 2011 Acta. Phys. Sin. 60 014208 (in Chinses) [齐晓庆, 高春清 2011 60 014208]
[20]	Xheng H D, Yu Y J, Dai L M, Wang T 2010 Acta. Phys. Sin. 59 6145 (in Chinses) [郑华东, 于瀛洁, 代林茂, 王涛 2010 59 6145]
[21]	Zhou Q, Lu J F, Yin J P 2010 Chin. Phys. B 19 093202
[22]	Zhou Q, Lu J F, Yin J P 2010 Chin. Phys. B 19 123203
[23]	Liu X Zhang J, Wu L Y, Gan Y F 2011 Chin. Phys. B 20 024211
[24]	Kotlyar V V, Seraphimovich P G, Soifer V A 1998 Opt. Laser. Eng. 29 261
[25]	Fienup J R, 1980 Opt. Eng. 19 297
[26]	Ripoll O, Kettunen V, Herzig H P 2004 Opt. Eng. 43 2549
[27]	Ji X M, Yin J P 2004 Acta Phys. Sin. 53 4163 (in Chinese) [纪宪明, 印建平 2004 53 4163]

施引文献

[1]	Greiner M, Mandel O, Esslinger T, Hansch T W, Bloch I 2002 Nature 415 39
[2]	Raithel G, Birkl G, Kastberg A, Phillips W D, Rolston S L 1997 Phys. Rev. Lett. 78 630
[3]	Vuletic V, Chin C, Kerman A J, Chu S 1998 Phys. Rev. Lett. 81 5768
[4]	Dutta S K, Teo B K, Raithel G 1999 Phys. Rev. Lett. 83 1934
[5]	Tie L, Xue J K 2011 Chin. Phys. B 20 120311
[6]	Wang J J, Zhang A X, Xue J K 2011 Chin. Phys. B 20 080308
[7]	Grabouski A, Pfau T 2003 Eur. Phys. J. D 22 347
[8]	Folman R 2002 Adv. At. Mol. Opt. Phys. 48 263
[9]	Reichel J, Hansel W, Hommelhoff P, Hansch T W 2001 Appl. Phys. B 72 81
[10]	Grynberg G, Robilliard C 2001 Phys. Rep. 355 335
[11]	Semmler D, Wernsdorfer J, Bissbort U, Byczuk K, Hofstetter W 2010 Phys. Rev. B 82 235115
[12]	Michael Kastner 2010 Phys. Rev. Lett. 104 240403
[13]	David A, Kessler, Eli Barkai 2010 Phys. Rev. Lett. 105 120602
[14]	Yi L, Mejri S, McFerran J J, Le C Y, Bize S 2011 Phys. Rev. Lett. 106 073005
[15]	Dumke R, Volk M, Mther T, Buchkremer F B J, Birkl G, Ertmer W 2002 Phys. Rev. Lett. 89 097903
[16]	Ji X M, Lu J F, Mu R W, Yin J P 2006 Acta. Phys Sin. 55 3396 (in Chinses) [纪宪明, 陆俊发, 沐仁旺, 印建平 2006 55 3396]
[17]	Gabriel M, David E, Jörgen B 2007 Appl. Opt. 46 95
[18]	Lu J F, Zhou Q, Ji X M, Yin J P 2011 Acta. Phys. Sin. 60 063701 (in Chinses) [陆俊发, 周琦, 纪宪明, 印建平 2011 60 063701]
[19]	Qi X Q, Gao C Q 2011 Acta. Phys. Sin. 60 014208 (in Chinses) [齐晓庆, 高春清 2011 60 014208]
[20]	Xheng H D, Yu Y J, Dai L M, Wang T 2010 Acta. Phys. Sin. 59 6145 (in Chinses) [郑华东, 于瀛洁, 代林茂, 王涛 2010 59 6145]
[21]	Zhou Q, Lu J F, Yin J P 2010 Chin. Phys. B 19 093202
[22]	Zhou Q, Lu J F, Yin J P 2010 Chin. Phys. B 19 123203
[23]	Liu X Zhang J, Wu L Y, Gan Y F 2011 Chin. Phys. B 20 024211
[24]	Kotlyar V V, Seraphimovich P G, Soifer V A 1998 Opt. Laser. Eng. 29 261
[25]	Fienup J R, 1980 Opt. Eng. 19 297
[26]	Ripoll O, Kettunen V, Herzig H P 2004 Opt. Eng. 43 2549
[27]	Ji X M, Yin J P 2004 Acta Phys. Sin. 53 4163 (in Chinese) [纪宪明, 印建平 2004 53 4163]

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