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The beauty of Planck’s law, describing thermal radiation, lies in its generality. Knowing the emissivity and temperature uniquely defines the spectral radiance. On the other hand, nonthermal emission, such as photoluminescence, is a fundamental light–matter quantum interaction that is associated with the chemical potential and is not bound by Planck’s law. In this work, we study the upper limit forRead More
Ideal Light Source – De-coherence without time averaging for high radiance uniform light source Imaging of microscopic structures, photography, and excitation of materials benefit from a uniform and high-power light source. Since lasers are high radiance light sources, they are good candidates for these purposes. However, their high coherence results in speckles; a nonuniform intensity. Spectral Radiance is the thermodynamicRead More
The challenge in solar energy today is not the cost of photovoltaics (PVs) electricity generation, already competing with fossil fuel prices, but rather utility-scale energy storage costs. Alternatively, low-cost thermal energy storage (TES) exists but relies on expensive concentrated solar power (CSP). A technology, able to unify PV conversion and TES, may usher in the era of efficient base-load renewableRead More
The Optical Society of America chose our Nature Communication paper as the most important work in solar energy for the year 2016
To apply thermodynamic principles for developing new optical devices. Including:
- Theoretical study on thermodynamics of radiation.
- Converting inefficient parts of the solar spectrum to wavelengths most efficient for energy-harvesting.
- Conversion of thermal energy to electricity.
- Efficient high power light sources fully integrated on-chip lasers.
We work with Excitonics. localized energy states in small molecules. By engineering the energy dynamics between Excitonics we bring the device functionality into the single molecule level.
Our group is highly multidisciplinary working at the interface between Physics, Thermodynamic, Optics, Materials, and Devices.
Excellent students and researchers in these areas are welcome to contact me.