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Multi-colour nanowire photonic crystal laser pixels
Jeremy B Wright1, Sheng Liu, George T Wang
11] Sandia National Laboratories, Albuquerque, New Mexico 87185, USA [2] Center for High Technology Materials, The University of New Mexico, Albuquerque, New Mexico 87106, USA.
Scientific Reports
|October 19, 2013
Summary
Researchers developed a new micro-laser technology using III-nitride nanowires for tunable, vertically emitting lasers. This innovation enables broad wavelength tuning for advanced lighting and display applications.
Area of Science:
- Optoelectronics
- Materials Science
- Nanotechnology
Background:
- Emerging applications like solid-state lighting and displays need micro-scale, vertically emitting lasers with tunable wavelengths.
- Current laser technologies face limitations in achieving broad wavelength tunability and desired geometric arrangements.
- Existing surface-emitting lasers require complex bandgap or cavity length modifications.
Purpose of the Study:
- To introduce a novel paradigm for micro-scale vertically emitting lasers with extended tuning range.
- To demonstrate a fabrication method for lasers with controllable, distinct lasing wavelengths.
- To enable the creation of "super-pixels" for advanced display technologies.
Main Methods:
- Utilizing broad gain-bandwidth III-nitride multiple quantum well (MQW) heterostructures.
- Employing a novel top-down nanowire photonic crystal nanofabrication technique.
- Integrating multiple monolithically grown gain sections with different emission center wavelengths.
Main Results:
- Achieved single-mode lasing in the blue-violet spectral region.
- Demonstrated a remarkable 60 nm (16%) wavelength tuning range, controlled by photonic crystal geometry.
- Successfully addressed challenges of conventional laser technologies for micro-scale applications.
Conclusions:
- The developed approach offers a new paradigm for tunable, vertically emitting micro-lasers.
- This technology can be extended to cover the entire visible spectrum for diverse applications.
- The method provides a viable solution for creating "super-pixels" for next-generation lighting and displays.
