Mobile charge induced periodic poling and device

Details Mobile charge induced periodic poling and device Mobile charge induced periodic poling and device

2006-09-08

2008-10-14

Sanghavi, Hemang (Department: 2874)

Optical: systems and elements

Optical frequency converter

C359S332000, C385S122000

Reexamination Certificate

active

07436579

ABSTRACT:
Devices and methods are disclosed for realizing a high quality bulk domain grating structure utilizing mobile charges that are generated by means of photo-excitation in a substrate. An effect of light exposure (UV, visible, or a combination of wavelengths) is to generate photo-induced charges. The application of a voltage across the substrate combined with the application of light exposure causes a photo-induced current to flow through the substrate. The photo-induced charges (behaving like virtual electrode inside the material) and the photo-induced current result in both reduction of the coercive field required for domain inversion in the material and improve realization of the domain inversion pattern, which previously has not been possible at room temperature.

REFERENCES:
patent: 3384433 (1968-05-01), Bloembergen
patent: 4236785 (1980-12-01), Papuchon et al.
patent: 5036220 (1991-07-01), Byer et al.
patent: 5171400 (1992-12-01), Magel et al.
patent: 5193023 (1993-03-01), Yamada et al.
patent: 5519802 (1996-05-01), Field et al.
patent: 5800767 (1998-09-01), Byer et al.
patent: 6565648 (2003-05-01), Nakamura et al.
patent: 7112263 (2006-09-01), Nihei
Bryan et al.“Increased optical damage resistance in Lithium Niobate” Appl. Phys. Lett. vol. 44. pp. 847-849, 1984.
Dierolf et al“Direct write method for domain inversion patterns in liNbO3”, Apl Phys Lett vol. 84 No. 20 pp. 3987-3989, 2004.
Fujimura et al “Fabrication of domain inverted gratings in MgO:LiNbO3 by applying voltage under ultraviolet irradiation through photomask at room temperature”, Elect Lett vol. 39 No. 9 p. 719-721, 2003.
Harada et al, “Bulk periodically poled MgO:LiNbO3 by corona discharge method”, Appl. Phys. Lett vol. 69, No. 18, pp. 2629-2631, 1996, Fuji Photo Film Co Ltd.
Huang et al.“A discussion on domain inversion in LiNbO3”, Appl. Phys. Lett. vol. 65. pp. 1763-1765, 1994.
Ito et al. “Fabrication of periodic domain grating in LiNbO3 by electron beam writing for application of nonlinear optical processes” Elect. Lett. vol. 27 pp. 1221-1224, 1991.
Keys et al, “Fabrication of domain reversed gratings for SHG in lithium niobate by electron beam bombardment”, Electronics Letters, vol. 26, No. 3 pp. 188-189, 1990.
Ming el. al., “The growth striation and ferroelctric domain structures in Czochralski grown LiNbO3 single crystals”, Journal of Materials Science, vol. 11, pp. 1663-1670, 1982.
Mizuuchi et al “Electric field poling in Mg doped LiNbO3”, Journal of Applied Phys, vol. 96, No. 11, pp. 6585-6590, Dec. 1, 2004.
Mizuuchi et al, “Efficient second harmonic generation of 340nm light in a 1.4 μm periodically poled bulk MgO:LiNbO3”, Jpn J Appl Phys vol. 42, pp. L90-L91, 2003.
Muller et al, “Influence of ultraviolet illumination on the poling characteristics of lithium niobate crystals”, Appl Phys Lett vol. 83 No. 9, pp. 1824-1826 2003.
Nakamura et al, “Periodic poling of magnesium oxide doped lithium niobate”, Jnl. Appl Phys, vol. 91, No. 7, pp. 4528-4534, Apr. 1, 2002.
Valdivia et al, “Nanoscale surface domain formation on the + Z face of lithium niobate by pulsed ultraviolet laser illumination”, Appl Phys Lett vol. 86, 2005.
Yamada et al., “Fabrication of periodically reversed domain structure for SHG in LiNbO3 by direct electron beam lithography at room temperature”, Elect. Lett. vol. 27, pp. 828-829, 1991.

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