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Title: Self-aligning concave relativistic plasma mirror with adjustable focus

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4973432· OSTI ID:1361715

We report an experimental-computational study of the optical properties of plasma mirrors (PMs) at the incident laser frequency when irradiated directly at relativistic intensity (10180<1019W/cm2) by near-normally incident (4°), high-contrast, 30 fs, 800 nm laser pulses. We find that such relativistic PMs are highly reflective (0.6–0.8) and focus a significant fraction of reflected light to intensity as large as ~10I0 at distance f as small as ~25 μm from the PM, provided that pre-pulses do not exceed 1014 W/cm2 prior to ~20 ps before arrival of the main pulse peak. Particle-in-cell simulations show that focusing results from denting of the reflecting surface by light pressure combined with relativistic transparency and that reflectivity and f can be adjusted by controlling pre-plasma length L over the range 0.5 ≲L ≲ 3 μm. Pump-probe reflectivity measurements show that the PM's focusing properties evolve on a ps time scale.

Research Organization:
Univ. of Texas, Austin, TX (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); US Air Force Office of Scientific Research (AFOSR); Engineering and Physical Sciences Research Council (EPSRC)
Grant/Contract Number:
SC0012444; SC0011617; FA9550-14-1-0045; SC0007889; SC001062; 2; FC52-08NA28512; NA0002008; FG02-04ER54742; EP/G054940/1; EP/G055165/1; EP/G056803/1; AC05-06OR23100
OSTI ID:
1361715
Alternate ID(s):
OSTI ID: 1420500; OSTI ID: 1425378
Journal Information:
Physics of Plasmas, Journal Name: Physics of Plasmas Vol. 24 Journal Issue: 1; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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Cited By (3)

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Highly efficient laser-driven Compton gamma-ray source journal January 2019