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High-Q mid-infrared thermal emitters operating with high power-utilization efficiency.
Optics Express
|July 14, 2016
Summary
We developed a high-efficiency mid-infrared thermal emitter using photonic crystals and quantum wells. This device achieves significantly higher peak intensity than a blackbody, enabling efficient thermal emission applications.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Efficient thermal emitters are crucial for various applications, including thermal imaging and spectroscopy.
- Existing thermal emitters often suffer from low power-utilization efficiency and broadband emission.
Purpose of the Study:
- To demonstrate a single-mode, high-Q (Q>100) mid-infrared thermal emitter with high power-utilization efficiency.
- To achieve narrowband thermal emission with significantly enhanced peak intensity compared to a blackbody.
Main Methods:
- Fabrication of a rod-type photonic crystal (PC) slab integrated with Gallium Arsenide/Aluminum Gallium Arsenide (GaAs/AlGaAs) multiple quantum wells (MQWs).
- Utilizing a GaAs substrate frame and electric wires for precise Joule heating.
- Careful structural design of the PC slab and supporting frame to minimize thermal losses.
Main Results:
- Achieved a single-mode thermal emitter with a high quality factor (Q>100) in the mid-infrared spectrum.
- Demonstrated high power-utilization efficiency.
- Obtained peak emission intensity an order of magnitude higher than a reference blackbody emitter for a given electrical input power.
Conclusions:
- The developed photonic crystal thermal emitter offers superior performance for mid-infrared applications.
- Efficient thermal management and narrowband emission are key to achieving high intensity.
- This technology holds promise for advanced thermal management and sensing.
