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Jpn. J. Appl. Phys. 41 (2002) pp. L291-L293  |Next Article|  |Table of Contents|
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Letter

An Easy Method for Fabricating TiO₂ Gel Photonic Crystals Using Molds and Highly Concentrated Alkoxide Solutions

Shu Shimada, Kun'ichi Miyazawa and Makoto Kuwabara

Department of Materials Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

(Received September 5, 2001; accepted for publication December 29, 2001)

Two types of two-dimensional (2D) photonic crystals (PCs) made of transparent TiO₂ xerogels and having triangular arrays of air columns and TiO₂ rods with a lattice constant of 15 µm were successfully fabricated from a highly concentrated Ti-alkoxide (Ti(OPrⁱ)₄) solution (1.6 mol/L) using Si micromolds. The gel PCs had dimensions of 10 µm thickness and of more than 300 µm width and length. The diameters of the air columns and TiO₂ rods formed in the PCs were 5 µm and 11 µm, respectively. It was found that the addition of polyethylene glycol is quite effective in producing crack-free gel PCs by this method. This method allows preparation of dense and highly transparent TiO₂ gel PCs and also allows the introduction of arbitrary defects at desired positions in PCs. This method can be applied for various kinds of metal alkoxides.

URL: http://jjap.jsap.jp/link?JJAP/41/L291/
DOI: 10.1143/JJAP.41.L291

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References | Citing Articles (7)

1. E. Yablonovitch: Phys. Rev. Lett. 58 (1987) 2059[APS].
2. J. D. Joannopoulos, R. D. Meade and J. N. Winn: Photonic Crystals (Princeton University Press, Princeton, 1995).
3. H. Kosaka, T. Kawashima, A. Tomita, M. Notomi, T. Tamamura, T. Sato and S. Kawakami: Appl. Phys. Lett. 74 (1999) 1370[AIP Scitation].
4. A. Birner, R. B. Wehrspohn, U. M. Gosele and K. Busch: Adv. Mater. 13 (2001) 377[CrossRef].
5. S. Noda, A. Chutinai and M. Imada: Nature 407 (2000) 608[CrossRef].
6. B. T. Holland, C. F. Blanford and A. Stein: Science 281 (1998) 538[Science].
7. M. Campbell, D. N. Sharp, M. T. Harrison, R. G. Denning and A. J. Turberfield: Nature 404 (2000) 53[CrossRef].
8. O. J. A. Schueller, G. M. Whitesides, J. A. Rogers, M. Meier and A. Dodabalapur: Appl. Opt. 38 (1999) 5799.
9. S. M. Wolfrum: J. Mater. Sci. Lett. 6 (1987) 706.
10. N. Tohge, A. Matsuda, T. Minami, Y. Matsuno, S. Katayama and Y. Ikeda: J. Non-Cryst. Solids 100 (1988) 501[CrossRef].
11. H. Simooka and M. Kuwabara: J. Am. Ceram. Soc. 78 (1995) 2849[CrossRef].
12. H. Simooka, K. Yamada, S. Takahashi and M. Kuwabara: J. Sol–Gel Sci. & Technol. 13 (1998) 873.

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