Surface modification of organic polymer by dual action of extreme ultraviolet/visible-near infrared ultrashort pulses
Tomáš MocekInstitute of Physics ASCR 1 Department of X-ray Lasers, , Na Slovance 2, Prague 8-182 21, Czech RepublicJ. PolanInstitute of Physics ASCR 1 Department of X-ray Lasers, , Na Slovance 2, Prague 8-182 21, Czech RepublicP. HomerInstitute of Physics ASCR 1 Department of X-ray Lasers, , Na Slovance 2, Prague 8-182 21, Czech RepublicKrzysztof JakubczakInstitute of Physics ASCR 1 Department of X-ray Lasers, , Na Slovance 2, Prague 8-182 21, Czech RepublicB. RusInstitute of Physics ASCR 1 Department of X-ray Lasers, , Na Slovance 2, Prague 8-182 21, Czech RepublicI. J. KimKorea Advanced Institute of Science and Technology 2 Coherent X-ray Research Center, , 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of KoreaChul Min KimKorea Advanced Institute of Science and Technology 2 Coherent X-ray Research Center, , 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of KoreaGae Hwang LeeKorea Advanced Institute of Science and Technology 2 Coherent X-ray Research Center, , 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of KoreaChang Hee NamKorea Advanced Institute of Science and Technology 2 Coherent X-ray Research Center, , 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of KoreaV. HájkováInstitute of Physics ASCR 3 Department of Laser Plasmas, , Na Slovance 2, Prague 8-182 21, Czech RepublicJ. ChalupskýInstitute of Physics ASCR 3 Department of Laser Plasmas, , Na Slovance 2, Prague 8-182 21, Czech RepublicL. JuhaInstitute of Physics ASCR 3 Department of Laser Plasmas, , Na Slovance 2, Prague 8-182 21, Czech Republic
2009en
ABI
Аннотация
We present the experimental evidence of structural surface modifications of poly(methyl methacrylate) (PMMA) caused by simultaneous action of extreme ultraviolet (XUV) (∼21 nm) and visible-near infrared (visible-NIR) (820/410 nm) ultrashort pulses. Although the fluence of each individual beam was far below the surface modification threshold, very efficient and specific material expansion was observed after irradiation of PMMA by more than ∼20 shots of mixed XUV/visible-NIR radiation. As the XUV photons generate free charge carriers, absorption of the optical radiation dramatically increases, which heats up the material and further enhances the XUV induced damage to the polymer chain.
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