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IEICE Transactions on Electronics 2008 E91-C(12):1869-1875; doi:10.1093/ietele/e91-c.12.1869
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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Special Section on The Forefront of 21st Century Organic Molecular Electronics -- Papers -- Materials & Devices

Evanescent-Field Modulation of Amplified Spontaneous Emissions from {pi}-Conjugate Polymer Film by a One-Dimensional Photonic Crystal

Yasushi KAMIYAMA1, Akihiro TOMIOKA1, Tomochika MIZUTANI1, Mutsuhito YAMAZAKI1 and Kouzirou MORIMOTO1

1 The authors are with the Faculty of Engineering, Osaka Electro-Communication University, Neyagawa-shi, 572-8530 Japan. E-mail: tomioka{at}isc.osakac.ac.jp


  Abstract

One-dimensional photonic crystal (PC) with alternating layers of TiO2 and SiO2 was fabricated with spin coating and low temperature baking, resulting in a successful tuning of the PC stop band so as to block the amplified spontaneous emission (ASE) of a {pi}-conjugate polymer film. Single PC as a substrate, not a cavity with two PC's, of the polymer film was sufficient to shift the tangential ASE to the energy at PC stop band edge, indicating that the tangential ASE propagating along the interface was modulated by its evanescent-field tail in the PC, which opens the new pathway for low-threshold coherent luminescence from an ultrathin {pi}-conjugate polymer film with ultimate mode volume.

Key Words: amplified spontaneous emission, photonic crystal, pi conjugate polymer, evanescent field, stop band

Manuscript received June 10, 2008. Manuscript revised August 5, 2008.


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