University of Virginia — Hopkins Group (ExSiTE Lab)

Snapshot

Why it matters internationally

UVA appears in the landscape through ultra-high-temperature materials work, with IR-EMPOWER reporting measurement of spectral emissivity and emittance from room temperature to ~4000 °C, and independent seminar material (Princeton) describing coupled ellipsometry and laser-heating radiometry up to the melting points of ceramics and carbides. Its importance is that it pushes emissivity research toward the ultrahigh-temperature frontier, where conventional furnace-based measurement logic breaks down and coupled optical-thermal methods become necessary — strategically relevant for aerospace, re-entry, thermal barrier, and refractory systems.

Scope of activity

Relevant unit

• Patrick Hopkins Group (ExSiTE Lab), UVA. Research program on ultra-high-temperature materials using laser-heating-based radiometry and ellipsometry.

Radiative properties measured

Spectral emissivity and emittance at extreme temperature · spectral absorptivity/emissivity of ceramics and carbides.

Capability envelope

• Temperature: room temperature to ~4000 °C.
• Methodology: combination of ellipsometry and laser-heating-based radiometry for measurement of ceramics and carbides up to their melting points.

Application domains

• Ultra-high-temperature materials
• Aerospace
• Thermal barrier materials
• Refractory systems
• Extreme-environment metrology

IR-EMPOWER contributions

• Hunter B. Schonfeld — direct and indirect measurement of spectral emissivity and emittance from room temperature to 4000 °C.

Why UVA Hopkins Group is a reference pole

Above about 2500 °C, furnace-based methods struggle and almost every standard emissivity assumption — thermalization, equilibrium, surface stability — becomes fragile. Laboratories that push coupled optical-thermal methods into that regime are rare, and they are the ones that define how the field extends toward re-entry- and hypersonics-relevant temperatures. UVA’s combination of ellipsometry with laser-heating radiometry places it firmly in that frontier.

External sources

• PMI/PCCM Seminar Series — Patrick Hopkins (Princeton)