Control over the crystalline state of sapphire

Saulius Juodkazis, Koichi Nishimura, Hiroaki Misawa, Takahiro Ebisui, Ryoichi Waki, Shigeki Matsuo, Tatsuya Okada

Research output: Contribution to journalArticle

106 Citations (Scopus)

Abstract

Control over the crystallanity and chemical reactivity of sapphire (Al 2O3) using femtosecond pulse exposure was investigated. Crystalline-to-amorphous and amorphous-to-polycrystalline transitions were induced inside a sapphire sample using single and multi-pulse radiation. The method allowed the fabrication of a 3D network of channels without apparent constraints on their length. Multipulse exposure of sapphire caused partial recrystallization of the amorphous phase. The results showed high selectivity of wet etching in sapphire optically amorphized by the pulses. It was also observed that the crystallinity of sapphire can be controlled with a precision of several nanometers by the appropriate choice of exposure conditions. It was demonstrated that matter can be subjected to extreme pressure by commonly available femtosecond laser radiation.

Original languageEnglish
Pages (from-to)1361-1364
Number of pages4
JournalAdvanced Materials
Volume18
Issue number11
DOIs
Publication statusPublished - 2006 Jun 6
Externally publishedYes

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Aluminum Oxide
Sapphire
Crystalline materials
Ultrashort pulses
Chemical reactivity
Wet etching
Laser radiation
Radiation
Fabrication

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Juodkazis, S., Nishimura, K., Misawa, H., Ebisui, T., Waki, R., Matsuo, S., & Okada, T. (2006). Control over the crystalline state of sapphire. Advanced Materials, 18(11), 1361-1364. https://doi.org/10.1002/adma.200501837

Control over the crystalline state of sapphire. / Juodkazis, Saulius; Nishimura, Koichi; Misawa, Hiroaki; Ebisui, Takahiro; Waki, Ryoichi; Matsuo, Shigeki; Okada, Tatsuya.

In: Advanced Materials, Vol. 18, No. 11, 06.06.2006, p. 1361-1364.

Research output: Contribution to journalArticle

Juodkazis, S, Nishimura, K, Misawa, H, Ebisui, T, Waki, R, Matsuo, S & Okada, T 2006, 'Control over the crystalline state of sapphire', Advanced Materials, vol. 18, no. 11, pp. 1361-1364. https://doi.org/10.1002/adma.200501837
Juodkazis S, Nishimura K, Misawa H, Ebisui T, Waki R, Matsuo S et al. Control over the crystalline state of sapphire. Advanced Materials. 2006 Jun 6;18(11):1361-1364. https://doi.org/10.1002/adma.200501837
Juodkazis, Saulius ; Nishimura, Koichi ; Misawa, Hiroaki ; Ebisui, Takahiro ; Waki, Ryoichi ; Matsuo, Shigeki ; Okada, Tatsuya. / Control over the crystalline state of sapphire. In: Advanced Materials. 2006 ; Vol. 18, No. 11. pp. 1361-1364.
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