標題: Time-domain and spectral-domain investigation of inflection-point slow-light modes in photonic crystal coupled waveguides
作者: Huang, Shih-Chieh
Kato, Masao
Kuramochi, Eiichi
Lee, Chien-Ping
Notomi, Masaya
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
公開日期: 19-Mar-2007
摘要: We report on spectral-domain and time-domain measurements and numerical calculations of group velocities in a photonic crystal coupled waveguide, where the unique guided mode band structure has a flat band region within the photonic band gap allowing for slow light observation. The spectral dependence of group velocity, which is measured by interference method, indicates the existence of slow light modes around the inflection point of the unique flat band, rather than at the band edge. Time-domain observation of optical pulses propagating along two-dimension slab photonic crystal coupled waveguides is also demonstrated by using a high speed oscilloscope. By adjusting the wavelength of the input pulses toward the flat band of the coupled defect modes, an increasing duration time between reference and output pulses are clearly observed. An extremely small group velocity of 0.017c is thus obtained. Calculated group velocities show good agreement with our measured results. (c) 2007 Optical Society of America.
URI: http://dx.doi.org/10.1364/OE.15.003543
http://hdl.handle.net/11536/11019
ISSN: 1094-4087
DOI: 10.1364/OE.15.003543
期刊: OPTICS EXPRESS
Volume: 15
Issue: 6
起始頁: 3543
結束頁: 3549
Appears in Collections:Articles


Files in This Item:

  1. 000245076200085.pdf