What question did this study set out to answer?

To accurately measure the optical constants n and k and determine film thicknesses for copper, silver, and gold across the 0.5 to 6.5 eV spectral range.

December 15, 1972Physical review. B, Solid state

Optical Constants of the Noble Metals

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Authors

PJP. B. JohnsonOld Dominion University RCR. W. ChristyDartmouth College

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Implication

Experimental study reveals optical constants in vacuum-evaporated noble metal films, establishing benchmark values for electronic band transitions across 0.5 to 6.5 eV.

Key Points

To accurately measure the optical constants n and k and determine film thicknesses for copper, silver, and gold across the 0.5 to 6.5 eV spectral range.
Carried out reflection and transmission optical measurements at room temperature on vacuum-evaporated thin films with thicknesses ranging from 185 to 500 Å.
Inverted three optical measurements simultaneously to compute both the film thickness d (estimated error ±2 Å) and optical constants n and k (estimated error <0.02 across most of the spectrum).
Determined that optical constant values were thickness-independent in the 250 to 500 Å range and showed no variation after vacuum annealing or exposure to air.
Demonstrated that free-electron optical effective masses and relaxation times extracted from near-infrared data aligned closely with previously established values.
Extracted the interband component of the imaginary dielectric constant by subtracting the free-electron contribution, matching contemporary theoretical calculations for copper and gold.

Cite This Study

Johnson et al. (1972) studied this question.

synapsesocial.com/papers/69d7cb07d6e98ee792d17c93 https://doi.org/10.1103/physrevb.6.4370

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December 15, 1972Physical review. B, Solid state

Optical Constants of the Noble Metals

View Full Paper

Ask AI

Bookmark

Authors

PJP. B. JohnsonOld Dominion University RCR. W. ChristyDartmouth College

Discussion

Member takes

Implication

Experimental study reveals optical constants in vacuum-evaporated noble metal films, establishing benchmark values for electronic band transitions across 0.5 to 6.5 eV.

Key Points

To accurately measure the optical constants n and k and determine film thicknesses for copper, silver, and gold across the 0.5 to 6.5 eV spectral range.
Carried out reflection and transmission optical measurements at room temperature on vacuum-evaporated thin films with thicknesses ranging from 185 to 500 Å.
Inverted three optical measurements simultaneously to compute both the film thickness d (estimated error ±2 Å) and optical constants n and k (estimated error <0.02 across most of the spectrum).
Determined that optical constant values were thickness-independent in the 250 to 500 Å range and showed no variation after vacuum annealing or exposure to air.
Demonstrated that free-electron optical effective masses and relaxation times extracted from near-infrared data aligned closely with previously established values.
Extracted the interband component of the imaginary dielectric constant by subtracting the free-electron contribution, matching contemporary theoretical calculations for copper and gold.

Cite This Study

Johnson et al. (1972) studied this question.

synapsesocial.com/papers/69d7cb07d6e98ee792d17c93 https://doi.org/10.1103/physrevb.6.4370

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