Paul is a physicist who received his Ph. D. from Stanford University in theoretical physics. Most of his research is in the areas of applied solid-state physics, and in environmental physics. Paul is affiliated with the Heat Island Group of our Division's Energy Analysis Program.
Current research interests include:
- Fluorescent pigments that re-radiate solar radiation, for cool roofing
- Combustion synthesis of mixed metal oxides
- Spectral and angular optical properties of rough and soiled surfaces
- Calorimetric measurements using sunlight
Recently, Paul has investigated how surface roughness reduces the solar reflectance of materials, the soiling and weathering of roofing materials and the destruction of air pollutants by photocatalytic oxidation using the semiconductor TiO2.
Prior to Paul's (semi-) retirement in 2005, he worked on synthesis of high-temperature superconducting YBa2Cu3O7 tapes (with R. Russo and R. Reade). World record critical current values were achieved in 1992. Other topics were infrared luminescence of the semiconductor InSb, infrared radiative cooling, longwave radiative transfer in the atmosphere, and the availability of the solar radiation resource.