Optical Properties of Fluid Hydrogen at the Transition to a Conducting State
Journal Article
·
· Physical Review Letters
- Carnegie Inst. of Washington, Washington D.C. (United States); Univ. of Edingburgh (United Kingdom); Howard Univ., Washington D.C. (United States)
- Carnegie Inst. of Washington, Washington D.C. (United States)
- Carnegie Inst. of Washington, Washington D.C. (United States); Howard Univ., Washington D.C. (United States)
- Carnegie Inst. of Washington, Washington D.C. (United States); Chinese Academy of Science, Hefei (China); Univ. of Science and Technology of China, Hefei (China)
We use fast transient transmission and emission spectroscopies in the pulse laser heated diamond anvil cell to probe the energy-dependent optical properties of hydrogen at pressures of 10–150 GPa and temperatures up to 6000 K. Hydrogen is absorptive at visible to near-infrared wavelengths above a threshold temperature that decreases from 3000 K at 18 GPa to 1700 K at 110 GPa. Finally, transmission spectra at 2400 K and 141 GPa indicate that the absorptive hydrogen is semiconducting or semimetallic in character, definitively ruling out a first-order insulator-metal transition in the studied pressure range.
- Research Organization:
- Energy Frontier Research Centers (EFRC) (United States). Energy Frontier Research in Extreme Environments (EFree)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); US Army Research Office (ARO); National Natural Science Foundation of China (NSFC)
- Grant/Contract Number:
- FC52-08NA28554; SC0001057; NSF EAR-1015239; NSF EAR-1520648; NSF EAR/IF-1128867; 56122-CH-H
- OSTI ID:
- 1387997
- Alternate ID(s):
- OSTI ID: 1258704
- Journal Information:
- Physical Review Letters, Vol. 116, Issue 25; Related Information: EFree partners with Carnegie Institution of Washington (lead); California Institute of Technology; Colorado School of Mines; Cornell University; Lehigh University; Pennsylvania State University; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 57 works
Citation information provided by
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