Multiphoton-absorbing organic materials for microfabrication, emerging optical applications and non-destructive three-dimensional imaging

Kevin D. Belfield, Katherine J. Schafer, Yong Liu, Jun Liu, Xiaobin Ren, Eric W. Van Stryland

Research output: Contribution to journalArticlepeer-review

225 Scopus citations

Abstract

Non-resonant two-photon absorption (TPA) can be defined as the simultaneous absorption of two photons, via a virtual state, in a medium. TPA exhibits a quadratic dependence of absorption on the incident light intensity, resulting in highly localized photoexcitation. Recent developments in the design and synthesis of efficient, stable TPA organic materials are discussed. Microfabrication via two-photon induced free radical polymerization of acrylate monomers and cationic polymerization of epoxide monomers was accomplished using commercially available photoinitiators, and also a custom-made compound possessing high two-photon absorptivity. Two-photon facilitated photoisomerization of a fulgide in solution and in a polymer thin film demonstrated two-photon induced photochromism and its application in interferometric image recording, respectively. Greatly enhanced signal-to-noise ratios and resolution were achieved in the non-destructive three-dimensional two-photon fluorescence imaging of a polymer-coated substrate versus conventional single-photon laser scanning confocal microscopic imaging. Multifunctional TPA organic materials and fabrication of functional microstructures are also discussed.

Original languageEnglish (US)
Pages (from-to)837-849
Number of pages13
JournalJournal of Physical Organic Chemistry
Volume13
Issue number12
DOIs
StatePublished - Dec 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Organic Chemistry

Keywords

  • Fluorescence imaging
  • Microfabrication
  • Photo-polymerization
  • Photoisomerization
  • Two-photon absorption

Fingerprint Dive into the research topics of 'Multiphoton-absorbing organic materials for microfabrication, emerging optical applications and non-destructive three-dimensional imaging'. Together they form a unique fingerprint.

Cite this