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A Survey of Transparent Conducting Films and Optoelectrical Materials for High Optical Power Applications

Journal Article · · Physica Status Solidi. A, Applications and Materials Science
The lifetime laser damage performance of a wide range of transparent conductive materials is assessed, including ultrathin metal films, doped metal oxides, doped compound semiconductors, and graphene whose carrier densities span five orders of magnitude from 1018 to 1023cm-3. Lifetime laser damage thresholds are determined by exposing material surfaces to repeated nanosecond laser pulses at near IR wavelengths (1064 nm). Near threshold fluences, two distinct damage modes, i.e., bulk and discrete, emerge depending on carrier density. These bulk and discrete damage modes are attributed to free carrier-induced bulk and localized, defect-driven absorption processes, respectively. For polycrystalline films with free carrier densities greater than ≈1020 cm-3, laser damage thresholds are less than 5 J cm-2. In contrast, bulk absorption is not apparent at thresholds substantially higher than ≈10 J cm-2 in single-crystal films with free carrier concentrations lower than ≈1019cm-3. By increasing thickness, films with lower carrier densities can deliver relevant levels of sheet conductance (<200 Ω sq-1) while remaining transparent. These lifetime laser damage threshold measurements offer systematic criteria to select materials aimed at handling high optical powers in optoelectronics devices and emerging plasmonic and metamaterials for lasers.
Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1567993
Alternate ID(s):
OSTI ID: 1560759
Report Number(s):
LLNL-JRNL-741079; 894755
Journal Information:
Physica Status Solidi. A, Applications and Materials Science, Journal Name: Physica Status Solidi. A, Applications and Materials Science Journal Issue: na Vol. na; ISSN 1862-6300
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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