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A monolithic white laser
Fan Fan1, Sunay Turkdogan1, Zhicheng Liu1
1School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, Arizona 85287, USA.
Nature Nanotechnology
|July 28, 2015
Summary
Researchers developed a novel semiconductor nanosheet laser that emits red, green, and blue light simultaneously. This breakthrough enables dynamic tuning across the full visible spectrum for advanced lighting and display applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Monolithic semiconductor lasers emitting across the visible spectrum are crucial for applications like solid-state lighting and full-color displays.
- Achieving a monolithic white laser has been hindered by challenges in epitaxial growth of mismatched materials for different colors.
Purpose of the Study:
- To demonstrate a monolithic multi-segment semiconductor nanosheet laser capable of simultaneous red, green, and blue (RGB) emission.
- To overcome material growth challenges for creating full-spectrum visible lasers.
Main Methods:
- Fabrication of a monolithic multi-segment semiconductor nanosheet using a quaternary ZnCdSSe alloy.
- Development of a novel nanomaterial growth strategy for precise control over segment composition, morphology, and bandgaps.
Main Results:
- Simultaneous lasing in red, green, and blue wavelengths from a single ZnCdSSe nanosheet device.
- Dynamic tunability of the nanolaser across the entire visible spectrum.
- Demonstration of a device covering 70% more perceptible colors than conventional illuminants.
Conclusions:
- The developed ZnCdSSe nanosheet laser represents a significant advancement towards monolithic white lasers.
- The novel growth strategy enables independent control of material properties for multi-color emission.
- This technology has the potential to revolutionize full-color displays, lighting, and sensing applications.
