Three-dimensional recording by femtosecond pulses in dielectrics

Saulius Juodkazis, Toshiaki Kondo, Vygantas Mizeikis, Shigeki Matsuo, Hiroyuki Murata, Hiroaki Misawa

Research output: Contribution to journalConference article

9 Citations (Scopus)

Abstract

Fabrication and characteristics of two-dimensional (2D) and three-dimensional (3D) periodic structures, recorded in the bulk of SU8 photoresist film by multiple-beam interference is described. Multiple beams (up to nine) were generated by a diffractive beam splitter. Recording was performed by ultrashort laser pulses with temporal width of 140 fs (FVWM) and central wavelength of 800 nm, derived from a Ti:sapphire laser. Intensity-dependent photomodification of the photoresist was due to single-photon as well as multi-photon (two and three) absorption. After the development, the exposed resist films contained free-standing 2D and 3D periodic dielectric structures with unexposed exposed regions removed by the development. Detailed examination of the samples has revealed close resemblance between their structure and the light intensity distributions in the multiple-beam interference fields, expected from the numerical calculations. Quality of the samples recorded by a single-photon absorption was lower than that of that of other samples, in particular due to poor development quality. The microfabrication method used in this work appears to be a suitable for obtaining photonic crystal templates.

Original languageEnglish
Pages (from-to)94-107
Number of pages14
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4977
DOIs
Publication statusPublished - 2003 Dec 5
EventPROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Photon Processing in Microelectronics and Photonics II - San Jose, CA, United States
Duration: 2003 Jan 272003 Jan 30

Keywords

  • Holographic recording
  • Photonic crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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