Direct picosecond measurement of photoinduced Cooper-pair breaking in lead

J. F. Federici; B. I. Greene; P. N. Saeta; D. R. Dykaar; F. Sharifi; R. C. Dynes

doi:10.1103/PhysRevB.46.11153

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Direct picosecond measurement of photoinduced Cooper-pair breaking in lead

J. F. Federici, B. I. Greene, P. N. Saeta, D. R. Dykaar, F. Sharifi, R. C. Dynes

DOI 10.1103/PhysRevB.46.11153 · Physical Review B

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Abstract

We report on a direct kinetic measurement of Cooper-pair breaking in superconducting lead. A 100-fs pulse of visible light was used to excite a thin-film lead sample, while the Cooper-pair density was optically probed using an ultrashort pulse of broadband far-infrared radiation. Subsequent to the absorption of the visible light, a rapid (<1 ps) change in the far-infrared optical transmission was observed, corresponding to the breaking of Cooper pairs and the collapse of the superconducting gap.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	unknown