Direct measurement of second-order coupling in a waveguide lattice

被引：16
|
作者：
Keil, Robert [1 ]
Pressl, Benedikt [1 ]
Heilmann, Rene [2 ]
Graefe, Markus [2 ]
Weihs, Gregor [1 ]
Szameit, Alexander [2 ]
机构：
[1] Univ Innsbruck, Inst Expt Phys, A-6020 Innsbruck, Austria
[2] Univ Jena, Inst Appl Phys, Abbe Ctr Photon, D-07743 Jena, Germany
来源：
APPLIED PHYSICS LETTERS | 2015年 / 107卷 / 24期
基金：
奥地利科学基金会; 欧洲研究理事会;
关键词：
OPTICAL BLOCH OSCILLATIONS; ARRAYS; LASER; INTERFERENCE;
D O I：
10.1063/1.4937807
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We measure the next-nearest-neighbour coupling in an array of coupled optical waveguides directly via an integrated eigenmode interferometer. In contrast to light propagation experiments, the technique is insensitive to nearest-neighbour dynamics. Our results show that second-order coupling in a linear configuration can be suppressed well below the level expected from the exponential decay of the guided modes. (C) 2015 AIP Publishing LLC.
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页数：4
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