Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform

Chan Shan Yang; Chih Hsuan Lin; Alexey Zaytsev; Kuei Chung Teng; Tsing Hua Her; Ci Ling Pan

doi:10.1063/1.4907637

Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform

Chan Shan Yang, Chih Hsuan Lin, Alexey Zaytsev, Kuei Chung Teng, Tsing Hua Her, Ci Ling Pan^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We have demonstrated the laser ablation of PMMA using dual-color waveform synthesis of the fundamental (ω) and its second-harmonic (2ω) of a femtosecond Ti:Sapphire laser. A modest and yet clear modulation (∼22%) in ablated area versus relative phase between the 2ω and ω beams with a power-ratio of 15% (28/183 mW) is revealed. This is explained qualitatively by the dependence of ablation on multiphoton ionization of which the rate is related to the relative phase of the synthesized waveform. At higher peak power ratios, the modulation decreases rapidly, as the two-photon-ionization rate of the 2ω dominates over that of the three-to four-photon ionization of the ω beam. This technique demonstrates the feasibility of phase-controlled laser processing of materials.

Original language	English
Article number	051902
Journal	Applied Physics Letters
Volume	106
Issue number	5
DOIs	https://doi.org/10.1063/1.4907637
Publication status	Published - 2015 Feb 2
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform",

abstract = "We have demonstrated the laser ablation of PMMA using dual-color waveform synthesis of the fundamental (ω) and its second-harmonic (2ω) of a femtosecond Ti:Sapphire laser. A modest and yet clear modulation (∼22%) in ablated area versus relative phase between the 2ω and ω beams with a power-ratio of 15% (28/183 mW) is revealed. This is explained qualitatively by the dependence of ablation on multiphoton ionization of which the rate is related to the relative phase of the synthesized waveform. At higher peak power ratios, the modulation decreases rapidly, as the two-photon-ionization rate of the 2ω dominates over that of the three-to four-photon ionization of the ω beam. This technique demonstrates the feasibility of phase-controlled laser processing of materials.",

author = "Yang, {Chan Shan} and Lin, {Chih Hsuan} and Alexey Zaytsev and Teng, {Kuei Chung} and Her, {Tsing Hua} and Pan, {Ci Ling}",

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T1 - Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform

AU - Yang, Chan Shan

AU - Lin, Chih Hsuan

AU - Zaytsev, Alexey

AU - Teng, Kuei Chung

AU - Her, Tsing Hua

AU - Pan, Ci Ling

PY - 2015/2/2

Y1 - 2015/2/2

N2 - We have demonstrated the laser ablation of PMMA using dual-color waveform synthesis of the fundamental (ω) and its second-harmonic (2ω) of a femtosecond Ti:Sapphire laser. A modest and yet clear modulation (∼22%) in ablated area versus relative phase between the 2ω and ω beams with a power-ratio of 15% (28/183 mW) is revealed. This is explained qualitatively by the dependence of ablation on multiphoton ionization of which the rate is related to the relative phase of the synthesized waveform. At higher peak power ratios, the modulation decreases rapidly, as the two-photon-ionization rate of the 2ω dominates over that of the three-to four-photon ionization of the ω beam. This technique demonstrates the feasibility of phase-controlled laser processing of materials.

AB - We have demonstrated the laser ablation of PMMA using dual-color waveform synthesis of the fundamental (ω) and its second-harmonic (2ω) of a femtosecond Ti:Sapphire laser. A modest and yet clear modulation (∼22%) in ablated area versus relative phase between the 2ω and ω beams with a power-ratio of 15% (28/183 mW) is revealed. This is explained qualitatively by the dependence of ablation on multiphoton ionization of which the rate is related to the relative phase of the synthesized waveform. At higher peak power ratios, the modulation decreases rapidly, as the two-photon-ionization rate of the 2ω dominates over that of the three-to four-photon ionization of the ω beam. This technique demonstrates the feasibility of phase-controlled laser processing of materials.

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Femtosecond laser ablation of polymethylmethacrylate via dual-color synthesized waveform

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