Ultrafast nonlinear refraction in integrated Fabry-Perot etalon containing polydiacetylene

M. Bakarezos, M. A. Camacho, I. J. Blewett, Ajoy Kumar Kar, Brian Spencer Wherrett, H. Matsuda, T. Fukuda, S. Yamada, R. Rangel-Rojo, H. Katagi, H. Kasai, S. Okada, H. Nakanishi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


A nonlinear integrated Fabry-Perot etalon containing poly-1,6-dicarbazolyl-2,4-hexadiyne (poly-DCHD) nanocrystals has been fabricated. Time-resolved fringe shifts following picosecond excitation at 645 nm are monitored with a broadband white-light-continuum probe. The shift towards shorter wavelengths indicates a negative refractive index change. The magnitude of the refractive cross-section is found to be 1.6×10-21 cm3, at a wavelength of approximately 700 nm, suggesting that polydiacetylene nanocrystal thin films are well suited for Fabry-Perot bared all-optical switching devices.

Original languageEnglish
Pages (from-to)1078-1079
Number of pages2
JournalElectronics Letters
Issue number13
Publication statusPublished - 24 Jun 1999


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