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Electrically switchable organo-inorganic hybrid for a white-light laser source
Jui-Chieh Huang1, Yu-Cheng Hsiao2, Yu-Ting Lin2
1Institute of Photonic System, College of Photonics, National Chiao Tung University, Guiren Dist., Tainan 71150, Taiwan.
Scientific Reports
|June 22, 2016
Summary
We developed a tunable white-light laser using a photonic bandgap hybrid. This energy-saving device offers adjustable wavelengths for coherent light applications.
Area of Science:
- Photonics
- Materials Science
- Laser Technology
Background:
- Coherent white-light sources are crucial for various advanced applications.
- Existing technologies often face limitations in tunability, energy efficiency, or spectral control.
- Photonic crystals offer unique light manipulation properties.
Purpose of the Study:
- To demonstrate a novel spectrally discrete white-light laser device.
- To achieve electrical tunability of laser wavelengths.
- To explore energy-saving operation for coherent white-light generation.
Main Methods:
- Fabrication of a photonic bandgap hybrid structure.
- The hybrid comprises a dye-doped cholesteric liquid crystal (CLC) soft photonic crystal sandwiched between two inorganic multilayer photonic crystals.
- Utilized a sole optical pump and applied voltage for laser generation and wavelength tuning.
Main Results:
- Achieved mono-, bi-, or tri-chromatic laser output with a single optical pump.
- Demonstrated electrical tunability of laser wavelengths via the voltage-controlled CLC soft photonic crystal.
- Observed three distinct spectral peaks originating from CLC bandedges and photonic defect modes.
Conclusions:
- The developed photonic bandgap hybrid laser offers a spectrally discrete and electrically tunable white-light source.
- The device exhibits energy-saving operation due to the optically bistable nature of CLC.
- This technology holds significant potential for meeting the demand for advanced coherent white-light sources.
