Midinfrared optical breakdown in transparent dielectrics |
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| Authors: | Simanovskii D M Schwettman H A Lee H Welch A J |
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| Affiliation: | W. W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, California 94305, USA. |
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| Abstract: | Optical breakdown measurements for transparent dielectrics are reported for 1 ps laser pulses as a function of mid-IR wavelength from 4.7 to 7.8 microm. For wide-gap dielectrics seed electrons are generated by tunnel ionization with subsequent avalanche ionization and laser absorption by dense plasma. For narrow-gap dielectrics tunnel ionization alone leads to dense plasma formation. |
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