Spatial Symmetry and Conservation of Orbital Angular Momentum in Spontaneous Parametric Down-Conversion

被引：29

作者：

Feng, Sheng ^{[1
]}

Kumar, Prem ^{[1
]}

机构：

[1] Northwestern Univ, Ctr Photon Commun & Comp, Dept EECS, Evanston, IL 60208 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.101.163602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Directly contradictory arguments coexist regarding the conservation rule of orbital angular momentum in spontaneous parametric down-conversion. We analytically show how this rule is decided by spatial symmetry. We discover that the down-converted photon pairs can carry non-negligible extrinsic orbital angular momentum in the degrees of relative-movement freedom due to spatial symmetry breaking, leading to nonconservation of total orbital angular momentum in type-II down-conversion. Also, we demonstrate that the traditional technique does not measure the extrinsic orbital angular momentum.

引用

页数：4

共 33 条

[1] Parametric down-conversion for light beams possessing orbital angular momentum [J].

Arlt, J ;

Dholakia, K ;

Allen, L ;

Padgett, MJ .

PHYSICAL REVIEW A, 1999, 59 (05) :3950-3952

[2] Orbital and intrinsic angular momentum of single photons and entangled pairs of photons generated by parametric down-conversion [J].

Arnaut, HH ;

Barbosa, GA .

PHYSICAL REVIEW LETTERS, 2000, 85 (02) :286-289

[3] Twin photons with angular-momentum entanglement: Phase matching [J].

Barbosa, GA ;

Arnaut, HH .

PHYSICAL REVIEW A, 2002, 65 (05) :538011-538017

[4] Transverse coincidence structures in spontaneous parametric down-conversion with orbital angular momentum: Theory [J].

Barbosa, Geraldo A. .

PHYSICAL REVIEW A, 2007, 76 (03)

[5] Geometrical optics of beams with vortices: Berry phase and orbital angular momentum Hall effect [J].

Bliokh, Konstantin Yu. .

PHYSICAL REVIEW LETTERS, 2006, 97 (04)

[6]

BURHAM DC, 1970, PHYS REV LETT, V25, P84

[7] Measuring two-photon orbital angular momentum entanglement [J].

Calvo, G. F. ;

Picon, A. ;

Bramon, A. .

PHYSICAL REVIEW A, 2007, 75 (01)

[8] Spontaneous parametric down-conversion: Anisotropical and anomalously strong narrowing of biphoton momentum correlation distributions [J].

Fedorov, M. V. ;

Efremov, M. A. ;

Volkov, P. A. ;

Moreva, E. V. ;

Straupe, S. S. ;

Kulik, S. P. .

PHYSICAL REVIEW A, 2008, 77 (03)

[9]

FENG S, ARXIV08051924

[10]

FENG S, ARXIVQUANTPH0703187

← 1 2 3 4 →