TY - GEN
T1 - Periodic domain inversion in Z-cut LiTaO3 by electron beam scanning assisted by an internal field within the crystal
AU - Gopalan, Venkatraman
AU - Nutt, Alan C.
AU - Gupta, Mool C.
PY - 1996
Y1 - 1996
N2 - The coercive field for domain reversal in a 0.5 mm Z-cut LiTaO 3 was measured to be 21 KV/mm. However, if the polarization of the crystal is reversed using an electric field of 21 KV/mm, the coercive field for a second reversal is found to be 11 KV/mm. This asymmetry is due to the presence of an in-built internal field of 5 KV/mm in the virgin crystal. If the electron beam writing is done on the new C-face of the polarization reversed region of the crystal, (1) no cracking was observed, (2) the writing required less charge for domain inversion because of the reduced coercive field, thereby facilitating shorter scan times. We have obtained uniform 3.6 μm period domain inversion grating using this technique.
AB - The coercive field for domain reversal in a 0.5 mm Z-cut LiTaO 3 was measured to be 21 KV/mm. However, if the polarization of the crystal is reversed using an electric field of 21 KV/mm, the coercive field for a second reversal is found to be 11 KV/mm. This asymmetry is due to the presence of an in-built internal field of 5 KV/mm in the virgin crystal. If the electron beam writing is done on the new C-face of the polarization reversed region of the crystal, (1) no cracking was observed, (2) the writing required less charge for domain inversion because of the reduced coercive field, thereby facilitating shorter scan times. We have obtained uniform 3.6 μm period domain inversion grating using this technique.
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M3 - Conference contribution
AN - SCOPUS:0029767774
SN - 0819420743
SN - 9780819420749
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 196
EP - 202
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Gupta, Mool C.
A2 - Kozlovsky, William J.
A2 - MacPherson, David C.
T2 - Nonlinear Frequency Generation and Conversion
Y2 - 29 January 1996 through 31 January 1996
ER -