Real-space observation of ultraslow light in photonic crystal waveguides

被引：439

作者：

Gersen, H

Karle, TJ

Engelen, RJP

Bogaerts, W

Korterik, JP

van Hulst, NF

Krauss, TF

Kuipers, L

机构：

[1] Univ Twente, Dept Sci & Technol, Appl Opt Grp, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, MESA, Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

[3] Univ St Andrews, Sch Phys & Astron, Ultrafast Photon Collaborat, St Andrews KY16 9SS, Fife, Scotland

[4] Univ Ghent, IMEC, Dept Informat Technol, INTEC, B-9000 Ghent, Belgium

[5] FOM, Inst Atom & Mol Phys, AMOLF, NL-1098 SJ Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

Boundary conditions - Dispersion (waves) - Photons - Scanning - Scanning electron microscopy - Semiconductor materials - Waveguides;

D O I：

10.1103/PhysRevLett.94.073903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show the real-space observation of fast and slow pulses propagating inside a photonic crystal waveguide by time-resolved near-field scanning optical microscopy. Local phase and group velocities of modes are measured. For a specific optical frequency we observe a localized pattern associated with a flat band in the dispersion diagram. During at least 3 ps, movement of this field is hardly discernible: its group velocity would be at most c/1000. The huge trapping times without the use of a cavity reveal new perspectives for dispersion and time control within photonic crystals.

引用

页码：1 / 4

页数：4

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