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Efficient organic distributed feedback lasers with imprinted active films.

Manuel G Ramirez1, Pedro G Boj, Victor Navarro-Fuster

  • 1Instituto Universitario de Materiales de Alicante and Unidad Asociada UA-CSIC, Universidad de Alicante, Alicante 03080, Spain.

Optics Express
|November 24, 2011
PubMed
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Efficient organic distributed feedback (DFB) lasers were fabricated using thermal nanoimprint lithography (NIL). This method offers a simple, low-cost approach for high-quality laser production with excellent performance and photostability.

Area of Science:

  • Organic electronics
  • Photonics
  • Materials science

Background:

  • Organic distributed feedback (DFB) lasers are crucial for tunable light sources.
  • Traditional fabrication methods can be complex and costly.
  • Improving the efficiency and manufacturability of organic lasers is an ongoing challenge.

Purpose of the Study:

  • To develop an efficient and cost-effective method for fabricating organic DFB lasers.
  • To investigate the impact of thermal nanoimprint lithography (NIL) on laser performance.
  • To achieve high-quality grating structures and excellent optical properties in organic laser films.

Main Methods:

  • Fabrication of organic DFB lasers using thermally-nanoimprinted active films.
  • Utilizing polystyrene films doped with a perylenediimide derivative as the active material.

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  • Employing thermal NIL at 155°C, avoiding room temperature or solvent-assisted techniques.

    • Main Results:

    • Achieved efficient organic DFB lasers emitting between 565 and 580 nm.
    • Demonstrated high grating quality and excellent modulation depth via thermal NIL.
    • Observed laser thresholds of 1 μJ/pulse, single-mode emission (<0.2 nm linewidth), and photostability of ~10⁵ pump pulses.
    • Confirmed that the 155°C heat exposure did not significantly alter the active material's properties.

    Conclusions:

    • Thermal NIL provides a simple, low-cost, and effective method for fabricating high-performance organic DFB lasers.
    • The developed technique offers comparable laser performance to standard DFBs with easier fabrication.
    • This approach enables the production of efficient and photostable organic lasers under ambient conditions.