Related Experiment Video
Updated: Jun 28, 2026
09:33
Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Broadband Radiative Heat Transfer Suppression via Dispersion-Engineered Metasurfaces
Lin Jing1, Mingze He1, Sander A Mann1,2
1Photonics Initiative, Advanced Science Research Center, City University of New York, New York, NY, 10031, USA.
Nature Communications
|June 26, 2026
Summary
This study introduces a novel dielectric metasurface pair for effective broadband thermal radiation suppression, overcoming limitations of traditional methods. The all-dielectric approach offers significant heat transfer reduction without metallic components.
Area of Science:
- Nanophotonics and Metamaterials
- Thermal Engineering
- Materials Science
Background:
- Metallic reflectors for radiative heat transfer suppression face limitations due to electrical conduction and material incompatibility.
- Non-metallic thermophotonic approaches are constrained by the Bode-Fano limit, leading to performance-bandwidth trade-offs.
Purpose of the Study:
- To develop a novel strategy for broadband radiative heat transfer suppression using complementary dispersion engineering in dielectric metasurfaces.
- To overcome the limitations of conventional thermophotonic approaches and metallic reflectors.
Main Methods:
- Co-design of aperiodic distributed Bragg reflector (DBR) pairs using stochastic gradient descent (SGD) optimization.
- Leveraging complementary dispersion engineering to misalign passbands across the thermal band of interest.
- Fabrication of a 7-layered (7-L) dielectric metasurface pair.
Main Results:
- Significant reduction in radiative heat exchange compared to fused silica benchmarks (82% via emissivity, 62.5% via radiometric quantification).
- Demonstrated broadband thermal decoupling within a compact, ultrathin all-dielectric platform.
- Exhibited robustness against design/fabrication tolerances and operational temperature drift (320-500 K).
Conclusions:
- Established a generalizable framework for bandwidth-unconstrained thermal radiation engineering.
- The all-dielectric metasurface approach circumvents metallic component limitations, enabling new possibilities for thermal management.
- Potential applications in energy-efficient systems, thermal insulation, and advanced thermal management solutions.
Related Concept Videos
01:17Radiation: Applications
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
01:05Absorption of Radiation
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
01:20Mechanisms of Heat Transfer II
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
01:19Mechanism of heat transfer
Understanding heat transfer mechanisms is essential for understanding how our bodies maintain balance in different environmental conditions. When the environment is thermoneutral, the body is in a state of balance, neither using nor releasing energy to maintain its core temperature. However, when the environment is not thermoneutral, the body employs four heat transfer mechanisms to maintain homeostasis: conduction, convection, evaporation, and radiation. These mechanisms facilitate heat...