TY - GEN
T1 - Internal field in lithium tantalate single crystals
AU - Gopalan, Venkatraman
AU - Gupta, Mool C.
PY - 1996/1/1
Y1 - 1996/1/1
N2 - An in-built internal field of 5 KV/mm was measured in Z-cut LiTaO 3 single crystals in the direction of the original polarization. This was reflected in the asymmetry (along the field axis) in the polarization hysteresis curve as a function of external electric field. Measurement of internal field as a function of crystal thickness revealed that the internal field is a volume effect. Using infrared absorption measurements, the spectrum of the hydroxyl ions (OH -) present in these crystals was measured at room temperature. The shape of the spectrum changes with polarization reversal in these crystals indicating a strong correlation with the direction of internal field with respect to the polarization direction. It suggests that the origin of internal field lies in point defect complexes involving OH - ions.
AB - An in-built internal field of 5 KV/mm was measured in Z-cut LiTaO 3 single crystals in the direction of the original polarization. This was reflected in the asymmetry (along the field axis) in the polarization hysteresis curve as a function of external electric field. Measurement of internal field as a function of crystal thickness revealed that the internal field is a volume effect. Using infrared absorption measurements, the spectrum of the hydroxyl ions (OH -) present in these crystals was measured at room temperature. The shape of the spectrum changes with polarization reversal in these crystals indicating a strong correlation with the direction of internal field with respect to the polarization direction. It suggests that the origin of internal field lies in point defect complexes involving OH - ions.
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M3 - Conference contribution
AN - SCOPUS:0029748041
SN - 0819420743
SN - 9780819420749
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 28
EP - 33
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 -