Space-selective valence state manipulation of transition metal ions inside glasses by a femtosecond laser

Qiu, Jianrong; Zhu, Congshan; Nakaya, Takayuki; Si, Jinhai; Kojima, Kazuo; Ogura, Fumito; Hirao, Kazuyuki
November 2001
Applied Physics Letters;11/26/2001, Vol. 79 Issue 22, p3567
Academic Journal
We report the observation of space-selective oxidation of Mn[sup 2+] to Mn[sup 3+] in a transparent and colorless Mn and Fe ions codoped silicate glass at room temperature by using an 800-nm-femtosecond laser. Difference absorption spectrum of the glass after and before the irradiation of the focused infrared femtosecond pulsed laser showed that a portion of Mn[sup 2+] ions near the focused part of the laser beam inside the glass were oxidized to Mn[sup 3+] ions after the laser irradiation. Mn[sup 3+] ions were stable at the temperatures below 300 °C. It is suggested that Mn[sup 2+] ions act as hole trapping centers while Fe[sup 3+] ions as well as active sites in the glass matrix act as electron trapping centers. A promising application was demonstrated for the fabrication of three-dimensional colored image inside a transparent material. © 2001 American Institute of Physics.


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