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Mirrorless lasing from mesostructured waveguides patterned by soft lithography

Yang1, Wirnsberger, Huang

  • 1Department of Chemistry, Department of Chemical Engineering, Department of Materials, University of California, Santa Barbara, CA 93106, USA. Department of Chemistry, Harvard University, Cambridge, MA 02138, USA.

Science (New York, N.Y.)
|January 22, 2000
PubMed
Summary
This summary is machine-generated.

Researchers created mesostructured silica waveguides for optical circuits. Doping with rhodamine 6G dye enabled amplified spontaneous emission at a low threshold, preventing dye aggregation within the mesoporous structure.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photonics

Background:

  • Mesoporous silica offers unique optical properties.
  • Block copolymer templating enables controlled nanostructure fabrication.
  • Soft lithography provides a scalable patterning method.

Purpose of the Study:

  • To fabricate mesostructured silica waveguide arrays.
  • To investigate waveguiding properties using a low-refractive index support.
  • To explore the potential for integrated optical circuits.

Main Methods:

  • Fabrication using acidic sol-gel block copolymer templating chemistry.
  • Utilizing soft lithography for patterning.
  • Doping mesostructure with rhodamine 6G laser dye.

Main Results:

  • Successful fabrication of mesostructured silica waveguide arrays.
  • Waveguiding achieved with a low-refractive index (1.15) mesoporous silica thin film support.
  • Observed amplified spontaneous emission with a low pumping threshold (10 kW/cm²) in rhodamine 6G doped waveguides.

Conclusions:

  • The mesostructure prevents dye aggregation, enabling high dye loading.
  • Mesostructured silica waveguides show potential for integrated optical circuits.
  • The process is highly processible and self-assembling.