Unveiling square and triangular optical lattices: a comparative study

Juarez G. Silva; Alcenisio J. Jesus-Silva; Marcio A. R. C. AlencarJandir M. HickmannEduardo J. S. Fonseca

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Unveiling square and triangular optical lattices: a comparative study

机译：揭开方形和三角形光学晶格的面纱：比较研究

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We study square and triangular optical lattice formation using a diffraction technique with light-possessing orbital angular momentum (OAM). We demonstrate that it is possible to use Fraunhofer diffraction of light by a square aperture to unveil OAM about two times bigger than would be possible with a triangular aperture. We notice that the pattern remains truncated until a topological charge (TC) equal to 20 with good precision. Even though a square pattern cannot be used to determine the TC sign, it is possible to measure high order of the modulus and sign of the TC up to 20, combining patterns of the triangular and square apertures.

机译：我们使用具有光的轨道角动量（OAM）的衍射技术研究了方形和三角形光学晶格的形成。我们证明，使用弗劳恩霍夫光的方形孔径衍射来揭示OAM是三角孔径的两倍。我们注意到，在拓扑电荷（TC）等于 20 之前，该模式一直保持截断状态，精度很高。尽管不能使用正方形图案来确定 TC 符号，但可以结合三角形和方形孔径的图案来测量 TC 的模量和符号的高阶 20。

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《Optics Letters》 |2014年第4期|949-952|共4页
作者
Juarez G. Silva; Alcenisio J. Jesus-Silva; Marcio A. R. C. AlencarJandir M. HickmannEduardo J. S. Fonseca;
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Optics and Materials Group-OPTMA, Universidade Federal de Alagoas, Caixa Postal 2051, Maceio, AL 57061-970, Brazil;

Departamento de Fisica, Universidade Federal de Sergipe, Centro de Ciencias Exatas e Tecnologia, Cidade Universitaria Prof. Jose Aloisio de Campos, Rod. Marechal Rondon s/n, Jardim Rosa Elze, Sao Cristovao, SE 57072-970, Brazil;

Instituto de Fisica, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil;

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Unveiling square and triangular optical lattices: a comparative study

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