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Organic semiconductor distributed feedback laser pixels for lab-on-a-chip applications fabricated by laser-assisted
Xin Liu1, Stephan Prinz, Heino Besser
1Light Technology Institute (LTI), Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany. uli.lemmer@kit.edu.
Faraday Discussions
|December 5, 2014
Summary
We developed a fast, inexpensive method to create organic semiconductor laser pixels on polymer chips using laser-assisted replication. This technique enables precise fabrication of distributed feedback (DFB) laser components for advanced analysis applications.
Area of Science:
- Materials Science
- Photonics
- Polymer Chemistry
Background:
- Organic semiconductor distributed feedback (DFB) lasers are crucial for biomedical and chemical analysis.
- Current fabrication methods for DFB corrugations are costly and slow.
Purpose of the Study:
- To develop an efficient and cost-effective method for fabricating organic DFB laser pixels on polymer chips.
- To enable precise, spatially localized patterning of nanoscale corrugations.
Main Methods:
- Utilized laser-assisted replication with a near-infrared diode laser.
- Fabricated poly(methyl methacrylate) (PMMA) chips with integrated organic DFB laser pixels.
- Employed laser transmission welding for chip encapsulation.
Main Results:
- Achieved rapid fabrication of DFB laser pixels on PMMA chips within 5 minutes per 30 mm × 30 mm chip.
- Enabled simultaneous generation of nanoscale gratings and microscale waveguide structures.
- Demonstrated the ability to add further nanostructures without damaging existing photonic components.
Conclusions:
- Laser-assisted replication offers a time-saving and inexpensive alternative for producing organic DFB laser pixels.
- This method facilitates the integration of DFB laser sources into all-polymer chips for analytical devices.
- The process allows for precise control over nanostructure placement and subsequent modifications.
