Research
Broken-symmetry metasurfaces
Breaking mirror, rotational, or translational symmetry to produce directional, polarization-selective, and chiral thermal emission.
Selected work
- Electro-optic symmetry breaking of BIC modes for tunable infrared emissivity. Materials Today Physics, 2023.
- Reversible symmetry breaking of BIC graphene plasmons for tunable mid-infrared absorption. Optics Express, 2024.
- Active tuning of angular asymmetric thermal emission via carrier injection in metal-insulator-metal resonance gratings. Surfaces and Interfaces, 2024.
Kirchhoff's law violation
Space-time modulation and other time-varying media that break reciprocity, enabling nonreciprocal thermal emission that violates Kirchhoff's law.
Selected work
- Violation of Kirchhoff's law of thermal radiation with a space-time modulated grating. ACS Photonics, 2022.
- Nonreciprocal thermal emission using spatiotemporal modulation of graphene. ACS Photonics, 2022.
Thermophotovoltaics
Wavelength-selective emitters and absorbers matched to a photovoltaic cell for efficient conversion of heat to electricity.
Selected work
- Novel and efficient Mie-metamaterial thermal emitter for thermophotovoltaic systems. Optics Express, 2016.
- Mie-metamaterials-based thermal emitter for near-field thermophotovoltaic systems. Materials, 2017.
- Optimal design of a wavelength-selective thermal emitter for thermophotovoltaic applications. J. Thermal Science and Engineering Applications, 2018.
Thermal management and intelligent energy systems
Heat-transfer modeling and control for building energy, HVAC, and battery thermal management, from thermal diodes to reduced-order models.
Selected work
- High-contrast far-field radiative thermal diode. Scientific Reports, 2017.
- High-rectification near-field thermal diode using a phase-change periodic nanostructure. Applied Physics Letters, 2016.