Research output: Contribution to journal › Article › peer-review
Abnormal kinetics of domain structure in KTA single crystals. / Akhmatkhanov, A. R.; Chuvakova, M. A.; Kipenko, I. A. et al.
In: Applied Physics Letters, Vol. 115, No. 21, 212901, 18.11.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Abnormal kinetics of domain structure in KTA single crystals
AU - Akhmatkhanov, A. R.
AU - Chuvakova, M. A.
AU - Kipenko, I. A.
AU - Dolgushin, N. A.
AU - Kolker, D. B.
AU - Vedenyapin, V. N.
AU - Isaenko, L. I.
AU - Shur, V. Ya
PY - 2019/11/18
Y1 - 2019/11/18
N2 - Single crystals of potassium titanyl phosphate (KTiOPO4, KTP) family (MTiOXO4, where M is K, Rb, or Cs, and X is P or As) with periodical domain structures have emerged as one of the key platforms for enabling nonlinear photonics applications. Potassium titanyl arsenate (KTiOAsO4, KTA) crystals possess nonlinear optical properties outperforming those of KTP. However, domain kinetics in KTA, being the crucial element for periodical poling, lacks comprehensive studies. We present the results of in situ imaging of domain kinetics in KTA with high temporal resolution. The analysis of a set of instantaneous domain structure images (kinetic map) has allowed reliable revealing of the slow and fast domain walls, similar to KTP. The mobility and the threshold fields for the domain walls have been estimated. The main stages of the domain structure evolution have been revealed. The original hatching stage representing the formation of quasiperiodic structure of the narrow stripe domains has been discovered. The relative input of the hatching stage has increased with external field. The obtained qualitative difference in the domain structure evolution, compared with KTP, has been attributed to a six times larger ratio of fast to slow wall mobility in KTA. This fact results in suppression of the undesirable broadening of the stripe domains thus making KTA crystals very attractive for periodical poling.
AB - Single crystals of potassium titanyl phosphate (KTiOPO4, KTP) family (MTiOXO4, where M is K, Rb, or Cs, and X is P or As) with periodical domain structures have emerged as one of the key platforms for enabling nonlinear photonics applications. Potassium titanyl arsenate (KTiOAsO4, KTA) crystals possess nonlinear optical properties outperforming those of KTP. However, domain kinetics in KTA, being the crucial element for periodical poling, lacks comprehensive studies. We present the results of in situ imaging of domain kinetics in KTA with high temporal resolution. The analysis of a set of instantaneous domain structure images (kinetic map) has allowed reliable revealing of the slow and fast domain walls, similar to KTP. The mobility and the threshold fields for the domain walls have been estimated. The main stages of the domain structure evolution have been revealed. The original hatching stage representing the formation of quasiperiodic structure of the narrow stripe domains has been discovered. The relative input of the hatching stage has increased with external field. The obtained qualitative difference in the domain structure evolution, compared with KTP, has been attributed to a six times larger ratio of fast to slow wall mobility in KTA. This fact results in suppression of the undesirable broadening of the stripe domains thus making KTA crystals very attractive for periodical poling.
KW - FLUX-GROWN KTIOPO4
KW - PERIODICALLY POLED KTIOASO4
KW - POLARIZATION REVERSAL
KW - CONDUCTIVITY
KW - FAMILY
UR - http://www.scopus.com/inward/record.url?scp=85075335572&partnerID=8YFLogxK
U2 - 10.1063/1.5125842
DO - 10.1063/1.5125842
M3 - Article
AN - SCOPUS:85075335572
VL - 115
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 21
M1 - 212901
ER -
ID: 22407500