Transient material properties during defect-assisted laser breakdown in deuterated potassium dihydrogen phosphate crystals
We investigate theoretically the transition from solid dielectric materials to warm solid density plasma during laser-induced breakdown in DKDP crystals (KD2PO4). Evidence taken from the experimentally measured wavelength dependence of the breakdown threshold suggests that the material excitation me...
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| Veröffentlicht in: | Journal of applied physics 2014-03, Vol.115 (10) |
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| container_title | Journal of applied physics |
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| creator | Duchateau, Guillaume Feit, Michael D. Demos, Stavros G. |
| description | We investigate theoretically the transition from solid dielectric materials to warm solid density plasma during laser-induced breakdown in DKDP crystals (KD2PO4). Evidence taken from the experimentally measured wavelength dependence of the breakdown threshold suggests that the material excitation mechanisms mainly consist of a sequence of one-photon absorptions between short-lived vibronic defect states spanning the band gap with a quasi-continuum of states. The transition between excitation paths involving different number of photons yields information about the role of temperature in determining the width of the transition and corresponding threshold conduction band density prior to initiation of breakdown. This physical system is well adapted to study a plasma warming up at solid density leading to the so-called warm dense matter. |
| doi_str_mv | 10.1063/1.4868161 |
| format | Article |
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Evidence taken from the experimentally measured wavelength dependence of the breakdown threshold suggests that the material excitation mechanisms mainly consist of a sequence of one-photon absorptions between short-lived vibronic defect states spanning the band gap with a quasi-continuum of states. The transition between excitation paths involving different number of photons yields information about the role of temperature in determining the width of the transition and corresponding threshold conduction band density prior to initiation of breakdown. This physical system is well adapted to study a plasma warming up at solid density leading to the so-called warm dense matter.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.4868161</identifier><language>eng</language><publisher>Melville: American Institute of Physics</publisher><subject>70 PLASMA PHYSICS AND FUSION TECHNOLOGY ; Applied physics ; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ; Conduction bands ; Crystal defects ; CRYSTALS ; Density ; Dependence ; Deuteration ; DIELECTRIC MATERIALS ; ELECTRONIC STRUCTURE ; ENERGY ABSORPTION ; Energy gap ; EXCITATION ; KDP crystals ; Laser induced breakdown ; LASER-PRODUCED PLASMA ; Material properties ; PHASE TRANSFORMATIONS ; PHOTONS ; PLASMA DENSITY ; POTASSIUM PHOSPHATES ; SOLIDS</subject><ispartof>Journal of applied physics, 2014-03, Vol.115 (10)</ispartof><rights>2014 AIP Publishing LLC.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c285t-c3fd4a5e2387c1fb1409239b0551446e2d3704baed14c09398edc98586b7ce333</citedby><cites>FETCH-LOGICAL-c285t-c3fd4a5e2387c1fb1409239b0551446e2d3704baed14c09398edc98586b7ce333</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22277893$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Duchateau, Guillaume</creatorcontrib><creatorcontrib>Feit, Michael D.</creatorcontrib><creatorcontrib>Demos, Stavros G.</creatorcontrib><title>Transient material properties during defect-assisted laser breakdown in deuterated potassium dihydrogen phosphate crystals</title><title>Journal of applied physics</title><description>We investigate theoretically the transition from solid dielectric materials to warm solid density plasma during laser-induced breakdown in DKDP crystals (KD2PO4). Evidence taken from the experimentally measured wavelength dependence of the breakdown threshold suggests that the material excitation mechanisms mainly consist of a sequence of one-photon absorptions between short-lived vibronic defect states spanning the band gap with a quasi-continuum of states. The transition between excitation paths involving different number of photons yields information about the role of temperature in determining the width of the transition and corresponding threshold conduction band density prior to initiation of breakdown. 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Evidence taken from the experimentally measured wavelength dependence of the breakdown threshold suggests that the material excitation mechanisms mainly consist of a sequence of one-photon absorptions between short-lived vibronic defect states spanning the band gap with a quasi-continuum of states. The transition between excitation paths involving different number of photons yields information about the role of temperature in determining the width of the transition and corresponding threshold conduction band density prior to initiation of breakdown. This physical system is well adapted to study a plasma warming up at solid density leading to the so-called warm dense matter.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4868161</doi></addata></record> |
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| ispartof | Journal of applied physics, 2014-03, Vol.115 (10) |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | 70 PLASMA PHYSICS AND FUSION TECHNOLOGY Applied physics CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Conduction bands Crystal defects CRYSTALS Density Dependence Deuteration DIELECTRIC MATERIALS ELECTRONIC STRUCTURE ENERGY ABSORPTION Energy gap EXCITATION KDP crystals Laser induced breakdown LASER-PRODUCED PLASMA Material properties PHASE TRANSFORMATIONS PHOTONS PLASMA DENSITY POTASSIUM PHOSPHATES SOLIDS |
| title | Transient material properties during defect-assisted laser breakdown in deuterated potassium dihydrogen phosphate crystals |
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