• 2553 Citations
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1989 …2020

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1996

Photoluminescence study on point defects in buried SiO2 film formed by implantation of oxygen

Seol, K. S., Ieki, A., Ohki, Y., Nishikawa, H. & Tachimori, M., 1996 Jan 1, In : Journal of Applied Physics. 79, 1, p. 412-416 5 p.

Research output: Contribution to journalArticle

37 Citations (Scopus)

Photoluminescence study on point defects in buried SiO2 film formed by implantation of oxygen

Seol, K. S., Ieki, A., Ohki, Y., Nishikawa, H. & Tachimori, M., 1996 Jan 1, In : Journal of Applied Physics. 79, p. 412-416

Research output: Contribution to journalArticle

37 Citations (Scopus)

Plasma-induced damage of silicon thermal oxides in the VLSI process

Nishikawa, H., Watanabe, E., Ito, D. & Tochikubo, F., 1996 Jan 1, In : Memoirs of Faculty of Engineering. p. 17-24

Research output: Contribution to journalArticle

Visible photoluminescence from Si clusters in γ-irradiated amorphous SiO2

Nishikawa, H., Watanabe, E., Ito, D., Sakurai, Y., Nagasawa, K. & Ohki, Y., 1996 Sep 1, In : Journal of Applied Physics. 80, p. 3513-3517

Research output: Contribution to journalArticle

116 Citations (Scopus)
1995

Nature of photoluminescence involving transitions from ground to 4fn-15d1 states in rare-earth-doped glasses

Yokokawa, T., Inokuma, H., Ohki, Y., Nishikawa, H. & Hama, Y., 1995 Apr 1, In : Journal of Applied Physics. 77, p. 4013-4017

Research output: Contribution to journalArticle

17 Citations (Scopus)

Nature of photoluminescence involving transitions from the ground to 4 fn-1 5d1 states in rare-earth-doped glasses

Yokokawa, T., Inokuma, H., Ohki, Y., Nishikawa, H. & Hama, Y., 1995 Dec 1, In : Journal of Applied Physics. 77, 8, p. 4013-4017 5 p.

Research output: Contribution to journalArticle

17 Citations (Scopus)

Optical and Electrical Studies on Point Defects in Amorphous SiO2 Films

Nishikawa, H., Watanabe, E. & Ito, D., 1995 Jan 1, In : Memoirs of Faculty of Engineering. p. 5031-5036

Research output: Contribution to journalArticle

Paramagnetic Defect Centers Induced by Excimer Lasers, γ-Rays, and Mechanical Fracturing in Amorphous SiO2

Nishikawa, H. & Ohki, Y., 1995 Jan 1, In : Defect and Diffusion Forum. 123-124, p. 123-134

Research output: Contribution to journalArticle

Photoluminescence and electron spin-resonance studies of defects in ion-implanted thermal SiO2 films

Nishikawa, H., Fukui, H., Watanabe, E., Ito, D., Takiyamal, M., Ieki, A. & Ohki, Y., 1995 Jan 1, In : Materials Science Forum. 196-201, p. 97-102

Research output: Contribution to journalArticle

1 Citation (Scopus)

Photoluminescence study of defect in ion-implanted thermal SiO2 films

Nishikawa, H., Watanabe, E., Ito, D., Takiyama, M., A.Ieki, A. I. & Ohki, Y., 1995 Jul 1, In : Default journal. 78, p. 842-846

Research output: Contribution to journalArticle

79 Citations (Scopus)

Photoluminescence study of defects in ion-implanted thermal SiO2 films

Nishikawa, H., Watanabe, E., Ito, D., Takiyama, M., Ieki, A. & Ohki, Y., 1995 Dec 1, In : Journal of Applied Physics. 78, 2, p. 842-846 5 p.

Research output: Contribution to journalArticle

79 Citations (Scopus)

Photoluminescence Study on Point Defects in SIMOX Buried SiO2 Film

S.Seol, K., Ieki, A., Ohki, Y., Nishikawa, H. & Tachimori, M., 1995 Jan 1, In : Materials Science Forum. 196-201, p. 1909-1914

Research output: Contribution to journalArticle

Role of point defects in dielectric breakdown of SiO2 formed by plasma-enhanced chemical vapor deposition

Ishii, K., Isshiki, D., Ohki, Y., Nishikawa, H. & Takiyama, M., 1995 Jan 1, In : Japanese Journal of Applied Physics. 34, p. 205-211

Research output: Contribution to journalArticle

15 Citations (Scopus)

Role of point defects in dielectric breakdown of sio2formed by plasma-enhanced chemical vapor deposition of tetraethoxysilane

Ishii, K., Isshiki, D., Ohki, Y., Nishikawa, H. & Takiyama, M., 1995 Jan, In : Japanese Journal of Applied Physics. 34, 1, p. 205-211 7 p.

Research output: Contribution to journalArticle

15 Citations (Scopus)
1994

Decay kinetics of the 4.4-eV photoluminescence associated with the two states of oxygen-deficient type defect in amorphous SiO2

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Mar 1, In : Physical Review Letters. 72, p. 2101-2104

Research output: Contribution to journalArticle

149 Citations (Scopus)

Decay kinetics of the 4.4-eV photoluminescence associated with the two states of oxygen-deficient-type defect in amorphous SiO2

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Jan 1, In : Physical Review Letters. 72, 13, p. 2101-2104 4 p.

Research output: Contribution to journalArticle

149 Citations (Scopus)

Gamma-Ray-Induced Loss of Er3+ -Doped Silica-Core Optical Fiber

Koyama, T., Dohguchi, N., Ohki, Y., Nishikawa, H., Kusama, Y. & Seguchi, T., 1994 Jul 1, In : Japanese Journal of Applied Physics. 33, p. 3937-3941

Research output: Contribution to journalArticle

1 Citation (Scopus)

Gamma-Ray-Induced Loss of E r3+-Doped Silica-Core Optical Fiber

Koyama, T., Dohguchi, N., Ohki, Y., Nishikawa, H., Kusama, Y. & Seguchi, T., 1994 Jul, In : Japanese Journal of Applied Physics. 33, 7R, 1 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Kinetics of enhanced photogeneration of E' centers in oxygen-deficient silica

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Jan 1, In : Journal of Non-Crystalline Solids. 179, p. 179-184

Research output: Contribution to journalArticle

18 Citations (Scopus)

Kinetics of enhanced photogeneration of E′ centers in oxygen-deficient silica

Nishikawa, H., Watanabe, E., Ito, D. & Ohki, Y., 1994 Nov 4, In : Journal of Non-Crystalline Solids. 179, C, p. 179-184 6 p.

Research output: Contribution to journalArticle

18 Citations (Scopus)

Optical characteristics of SiO2 formed by plasma-enhanced chemical-vapor deposition of tetraethoxysilane

Ishii, K., Ohki, Y. & Nishikawa, H., 1994 Nov 1, In : Journal of Applied Physics. 76, p. 5418-5422

Research output: Contribution to journalArticle

20 Citations (Scopus)

Optical characteristics of SiO2 formed by plasma-enhanced chemical-vapor deposition of tetraethoxysilane

Ishii, K., Ohki, Y. & Nishikawa, H., 1994 Dec 1, In : Journal of Applied Physics. 76, 9, p. 5418-5422 5 p.

Research output: Contribution to journalArticle

20 Citations (Scopus)

Point defects in high purity silica induced by high-dose gamma irradiation

Sakurai, Y., Nagasawa, K., Nishikawa, H. & Ohki, Y., 1994 Dec 1, In : Journal of Applied Physics. 75, 3, p. 1372-1377 6 p.

Research output: Contribution to journalArticle

38 Citations (Scopus)
1993
54 Citations (Scopus)

Correlation of preexisting diamagnetic defect centers with induced paramagnetic defect centers by ultraviolet or vacuum-ultraviolet photons in high-purity silica glasses

Nishikawa, H., Nakamura, R., Ohki, Y. & Hama, Y., 1993 Jan 1, In : Physical Review B. 48, 21, p. 15584-15594 11 p.

Research output: Contribution to journalArticle

54 Citations (Scopus)

Enhanced photogeneration of E′ centers from neutral oxygen vacancies in the presence of hydrogen in high-purity silica glass

Nishikawa, H., Nakamura, R., Ohki, Y. & Hama, Y., 1993 Jan 1, In : Physical Review B. 48, 5, p. 2968-2973 6 p.

Research output: Contribution to journalArticle

24 Citations (Scopus)

Enhaunced photogeneration of E' centers from neutral oxygen vacancies in the presence of hydrogen in high-purity silica glass

Nishikawa, H., Nakamura, R., Ohki, Y. & Hama, Y., 1993 Aug 1, In : Physical Review B. 48, p. 2968-2973

Research output: Contribution to journalArticle

24 Citations (Scopus)

Various bonding forms of OH groups in hydrogen-treated silica

Kitagawa, M., Nishikawa, H., Ohki, Y. & Hama, Y., 1993 Dec 1, In : Journal of Applied Physics. 74, 4, p. 2378-2380 3 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Various bonding forms of OH groups in hydrogen-treated silica

Kitagawa, M., Nishikawa, H. & Ohki, Y., 1993 Aug 1, In : Journal of Applied Physics. 74, p. 2378-2380

Research output: Contribution to journalArticle

12 Citations (Scopus)
1992

Characterization od ClOx radicals in vacuum-ultraviolet-irradiated high-purity silica

Nishikawa, H., Nakamura, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1992 Oct 1, In : The American Physical Society. 46, p. 8073-8079

Research output: Contribution to journalArticle

13 Citations (Scopus)

Characterization of ClOx radicals in vacuum-ultraviolet-irradiated high-purity silica glass

Nishikawa, H., Nakamura, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1992 Jan 1, In : Physical Review B. 46, 13, p. 8073-8079 7 p.

Research output: Contribution to journalArticle

13 Citations (Scopus)

Photoluminescence from defect centers in high-purity silica glasses observed under 7.9-eV excitation

Nishikawa, H., Shiroyama, T., Nakamura, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1992 Jan 1, In : Physical Review B. 45, 2, p. 586-591 6 p.

Research output: Contribution to journalArticle

393 Citations (Scopus)
1991

Effect of high-temperature treatment on optical-absorption bands in amorphous SiO2

Dohguchi, N., Munekuni, S., Nishikawa, H., Ohki, Y. & Nagasawa, K., 1991 Sep 1, In : Journal of Applied Physics. 70, p. 2788-2790

Research output: Contribution to journalArticle

3 Citations (Scopus)

Effect of high-temperature treatment on optical-absorption bands in amorphous SiO2

Dohguchi, N., Munekuni, S., Nishikawa, H., Ohki, Y. & Nagasawa, K., 1991 Dec 1, In : Journal of Applied Physics. 70, 5, p. 2788-2790 3 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)

Si - O - Si strained bond and paramagnetic defect centers induced by mechanical fracturing in amorphous SiO2

Munekuni, S., Dohguchi, N., Nishikawa, H., Ohki, Y., Nagasawa, K. & Hama, Y., 1991 Dec 1, In : Journal of Applied Physics. 70, 9, p. 5054-5062 9 p.

Research output: Contribution to journalArticle

24 Citations (Scopus)

Si-O-Si strained bond and paramagnetic defect centers induced by mechanical fracturing in amorphous SiO2

Munekuni, S., Nohguchi, N., Nishikawa, H., Ohki, Y., Nagasawa, K. & Hama, Y., 1991 Nov 1, In : Journal of Applied Physics. 70, p. 5054-5062

Research output: Contribution to journalArticle

24 Citations (Scopus)
1990

Generation mechanism of photoinduced paramagnetic centers from preexisting precursors in high-purity silicas

Nishikawa, H., Nakamura, R., Tohmon, R., Ohki, Y., Sakurai, Y., Nagasawa, K. & Hama, Y., 1990 Jan 1, In : Physical Review B. 41, 11, p. 7828-7834 7 p.

Research output: Contribution to journalArticle

89 Citations (Scopus)
1989

Defects and optical absorption bands induced by surplus oxygen in high-purity synthetic silica

Nishikawa, H., Tohmon, R., Ohki, Y., Nagasawa, K. & Hama, Y., 1989 Dec 1, In : Journal of Applied Physics. 65, 12, p. 4672-4678 7 p.

Research output: Contribution to journalArticle

126 Citations (Scopus)