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High performance organic distributed Bragg reflector lasers fabricated by dot matrix holography
Optics Express
|December 25, 2015
Summary
Researchers developed novel distributed Bragg reflector (DBR) polymer lasers using dot matrix holography. These polymer lasers achieve single-mode lasing at 622 nm with a low threshold and high efficiency.
Area of Science:
- Optoelectronics
- Polymer Science
- Holography
Background:
- Distributed Bragg reflector (DBR) lasers are crucial optical devices.
- Fabrication of polymer-based DBR lasers presents unique challenges.
- Controlling laser properties requires precise control over cavity design.
Purpose of the Study:
- To report the fabrication of DBR polymer lasers using dot matrix holography.
- To characterize the lasing performance of these novel devices.
- To demonstrate the versatility of dot matrix holography for laser design.
Main Methods:
- Fabrication of DBR mirrors with variable separations using dot matrix holography.
- Spin-coating an energy transfer blend of blue and red-emitting conjugated polymers.
- Optical pumping to induce and measure lasing characteristics.
- UV-imprinting technique for flexible DBR laser fabrication.
Main Results:
- Achieved single-mode lasing at 622 nm with a 0.41 nm bandwidth.
- Demonstrated a low working threshold of 13.5 μJ/cm².
- Measured a slope efficiency of 5.2%.
- Compared DBR cavity performance with distributed feedback (DFB) lasers, noting DFB's higher threshold.
Conclusions:
- Dot matrix holography is a versatile method for designing DBR polymer lasers.
- The fabricated lasers exhibit efficient, single-mode operation.
- Flexible DBR lasers can be produced using UV-imprinting, showcasing the technique's adaptability.
