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Flexible blue-emitting encapsulated organic semiconductor DFB laser.
Johannes Herrnsdorf1, Benoit Guilhabert, Yujie Chen
1Institute of Photonics, University of Strathclyde, Glasgow G4 0NW, UK. johannes.herrnsdorf@strath.ac.uk
Optics Express
|December 18, 2010
Summary
Flexible distributed feedback (DFB) lasers were created using soft-lithography. These lasers emit blue light and demonstrate stable operation in ambient conditions, showcasing a low-cost fabrication method.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Mechanically flexible lasers are crucial for next-generation electronic devices.
- Developing cost-effective fabrication methods for flexible lasers remains a challenge.
Purpose of the Study:
- To fabricate mechanically flexible distributed feedback (DFB) lasers using a low-cost soft-lithography technique.
- To characterize the optical properties and operational stability of the fabricated flexible DFB lasers.
Main Methods:
- Holographic master gratings were used for soft-lithography to create the DFB structures.
- Star-shaped oligofluorene was employed as the gain material for laser emission.
- Device encapsulation was performed to ensure stability in ambient conditions.
Main Results:
- Laser emission was achieved in the blue spectrum, ranging from 425 to 442 nm.
- A soft pump threshold of 14.4 μJ/cm was determined.
- Encapsulated devices exhibited stable operation in ambient atmosphere with a degradation energy dosage of 53 J/cm.
Conclusions:
- The study successfully demonstrated a low-cost fabrication of mechanically flexible DFB lasers.
- The developed flexible lasers show promising performance and stability for practical applications.
- Soft-lithography offers a viable route for scalable production of optoelectronic devices.
