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    Ultrafast Spectroscopy of Electron Phonon Coupling in Gold

    Source: Journal of Heat Transfer:;2014:;volume( 136 ):;issue: 012::page 122401
    Author:
    Guo, Liang
    ,
    Xu, Xianfan
    DOI: 10.1115/1.4028543
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Transient reflectance of gold was measured using ultrafast spectroscopy by varying the wavelength of the probe laser beam in the visible range. Based on the band structure of gold, the influence of the probe beam wavelength on the signal trend is analyzed in terms of sensitivity, effect of nonthermalized electrons, and relaxation rate. It is found that probing around 490 nm renders the best sensitivity and a simple linear relation between the transient reflectance and the electron temperature. The twotemperature model (TTM) is applied to calculate the electronphonon coupling factor by fitting the transient reflectance signal. This work clarifies the ultrafast energy transfer dynamics in gold and the importance of using proper probe laser wavelength for modeling the transient heat transfer process in metal.
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      Ultrafast Spectroscopy of Electron Phonon Coupling in Gold

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    http://yetl.yabesh.ir/yetl1/handle/yetl/155421
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    contributor authorGuo, Liang
    contributor authorXu, Xianfan
    date accessioned2017-05-09T01:09:48Z
    date available2017-05-09T01:09:48Z
    date issued2014
    identifier issn0022-1481
    identifier otherht_136_12_122401.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/155421
    description abstractTransient reflectance of gold was measured using ultrafast spectroscopy by varying the wavelength of the probe laser beam in the visible range. Based on the band structure of gold, the influence of the probe beam wavelength on the signal trend is analyzed in terms of sensitivity, effect of nonthermalized electrons, and relaxation rate. It is found that probing around 490 nm renders the best sensitivity and a simple linear relation between the transient reflectance and the electron temperature. The twotemperature model (TTM) is applied to calculate the electronphonon coupling factor by fitting the transient reflectance signal. This work clarifies the ultrafast energy transfer dynamics in gold and the importance of using proper probe laser wavelength for modeling the transient heat transfer process in metal.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleUltrafast Spectroscopy of Electron Phonon Coupling in Gold
    typeJournal Paper
    journal volume136
    journal issue12
    journal titleJournal of Heat Transfer
    identifier doi10.1115/1.4028543
    journal fristpage122401
    journal lastpage122401
    identifier eissn1528-8943
    treeJournal of Heat Transfer:;2014:;volume( 136 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian