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. 2017 Apr 4;7:626. doi: 10.1038/s41598-017-00725-4

Figure 1.

Figure 1

The fluence pattern, temperature change and PA signal waveform of (a) conventional short laser pulse induced PA effect with both stress and thermal confinements satisfied; (b) long laser pulse induced dual PA nonlinear effect with only thermal confinement satisfied, and (c) even longer laser pulse without thermal confinement.