Twisting Light by Nonlinear Photonic Crystals

被引：158

作者：

Bloch, Noa Voloch ^{[1
]}

Shemer, Keren ^{[1
]}

Shapira, Asia ^{[1
]}

Shiloh, Roy ^{[1
]}

Juwiler, Irit ^{[2
]}

Arie, Ady ^{[1
]}

机构：

[1] Tel Aviv Univ, Fleischman Fac Engn, Dept Phys Elect, IL-69978 Tel Aviv, Israel

[2] Sami Shamoon Coll Engn, Dept Elect & Elect Engn, IL-77245 Ashdod, Israel

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 23期

基金：

以色列科学基金会;

关键词：

ORBITAL ANGULAR-MOMENTUM; 2ND-HARMONIC GENERATION; OPTICAL VORTICES; VORTEX SOLITONS; BEAMS; DIFFRACTION; MODES;

D O I：

10.1103/PhysRevLett.108.233902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the observation of nonlinear interactions in quadratic nonlinear crystals having a geometrically twisted susceptibility pattern. The quasi-angular-momentum of these crystals is imprinted on the interacting photons during the nonlinear process so that the total angular momentum is conserved. These crystals affect three basic physical quantities of the output photons: energy, translational momentum, and angular momentum. Here we study the case of second-order harmonic vortex beams, generated from a Gaussian pump beam. These crystals can be used to produce multidimensional entanglement of photons by angular momentum states or for shaping the vortex's structure and polarization.

引用

页数：5

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