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Time-resolved imaging of flyer dynamics for femtosecond laser-induced backward transfer of solid polymer thin films

Time-resolved imaging of flyer dynamics for femtosecond laser-induced backward transfer of solid polymer thin films
Time-resolved imaging of flyer dynamics for femtosecond laser-induced backward transfer of solid polymer thin films
We have studied the transfer regimes and dynamics of polymer flyers from laser-induced backward transfer (LIBT) via time-resolved shadowgraphy. Imaging of the flyer ejection phase of LIBT of 3.8µm and 6.4µm thick SU-8 polymer films on germanium and silicon carrier substrates was performed over a time delay range of 1.4- 16.4µs after arrival of the laser pulse. The experiments were carried out with 150fs, 800nm pulses spatially shaped using a digital micromirror device, and laser fluences of up to 3.5J/cm2 while images were recorded via a CCD camera and a spark discharge lamp. Velocities of flyers found in the range of 6-20m/s, and the intact and fragmented ejection regimes, were a function of donor thickness, carrier and laser fluence. The crater profile of the donor after transfer and the resulting flyer profile indicated different flyer ejection modes for Si carriers and high fluences. The results contribute to better understanding of the LIBT process, and help to determine experimental parameters for successful LIBT of intact deposits.
0169-4332
1231-1238
Feinäugle, M.
3b15dc5b-ff52-4232-9632-b1be238a750c
Gregorčič, P.
0deb2acf-99e2-41f8-a021-9793634087e4
Heath, D.
d53c269d-90d2-41e6-aa63-a03f8f014d21
Mills, B.
05f1886e-96ef-420f-b856-4115f4ab36d0
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020
Feinäugle, M.
3b15dc5b-ff52-4232-9632-b1be238a750c
Gregorčič, P.
0deb2acf-99e2-41f8-a021-9793634087e4
Heath, D.
d53c269d-90d2-41e6-aa63-a03f8f014d21
Mills, B.
05f1886e-96ef-420f-b856-4115f4ab36d0
Eason, R.W.
e38684c3-d18c-41b9-a4aa-def67283b020

Feinäugle, M., Gregorčič, P., Heath, D., Mills, B. and Eason, R.W. (2017) Time-resolved imaging of flyer dynamics for femtosecond laser-induced backward transfer of solid polymer thin films. Applied Surface Science, 396, 1231-1238. (doi:10.1016/j.apsusc.2016.11.120).

Record type: Article

Abstract

We have studied the transfer regimes and dynamics of polymer flyers from laser-induced backward transfer (LIBT) via time-resolved shadowgraphy. Imaging of the flyer ejection phase of LIBT of 3.8µm and 6.4µm thick SU-8 polymer films on germanium and silicon carrier substrates was performed over a time delay range of 1.4- 16.4µs after arrival of the laser pulse. The experiments were carried out with 150fs, 800nm pulses spatially shaped using a digital micromirror device, and laser fluences of up to 3.5J/cm2 while images were recorded via a CCD camera and a spark discharge lamp. Velocities of flyers found in the range of 6-20m/s, and the intact and fragmented ejection regimes, were a function of donor thickness, carrier and laser fluence. The crater profile of the donor after transfer and the resulting flyer profile indicated different flyer ejection modes for Si carriers and high fluences. The results contribute to better understanding of the LIBT process, and help to determine experimental parameters for successful LIBT of intact deposits.

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Accepted/In Press date: 15 November 2016
e-pub ahead of print date: 19 November 2016
Published date: 28 February 2017
Organisations: Optoelectronics Research Centre

Identifiers

Local EPrints ID: 403150
URI: http://eprints.soton.ac.uk/id/eprint/403150
ISSN: 0169-4332
PURE UUID: 93dba096-fe3c-4259-a86f-41f3f2a93be7
ORCID for B. Mills: ORCID iD orcid.org/0000-0002-1784-1012
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 28 Nov 2016 09:54
Last modified: 18 Feb 2021 17:08

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