TY - JOUR
T1 - Encryption of nonlinear optical signals in ZnO:Al thin films by ultrashort laser pulses
AU - Castro-Chacón, J. H.
AU - Torres-Torres, C.
AU - Khomenko, A. V.
AU - García-Zárate, M. A.
AU - Trejo-Valdez, M.
AU - Martínez-Gutiérrez, H.
AU - Torres-Martínez, R.
N1 - Publisher Copyright:
© 2016 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2017/3/26
Y1 - 2017/3/26
N2 - Described herein is the effect of optical annealing on the third-order non-linear optical properties exhibited by nanostructured Al-doped ZnO thin films. The samples were synthetized by an ultrasonic spray pyrolysis method. The optical annealing process was carried out by laser pulses at 532, 835 and 1064 nm wavelengths with, ps, fs and ps pulse duration, respectively. The optical non-linearity of the films was measured by the z-scan method with three different irradiations of excitation: 100 fs at 835 nm, 120 ps at 532 nm, and 150 ps at 1064 nm. The as-grown samples showed a saturable optical absorption that evolves into two-photon absorption transitions by a picosecond optical annealing phenomenon induced at 532 nm wavelength. Potential applications for developing optical encryption functions were considered.
AB - Described herein is the effect of optical annealing on the third-order non-linear optical properties exhibited by nanostructured Al-doped ZnO thin films. The samples were synthetized by an ultrasonic spray pyrolysis method. The optical annealing process was carried out by laser pulses at 532, 835 and 1064 nm wavelengths with, ps, fs and ps pulse duration, respectively. The optical non-linearity of the films was measured by the z-scan method with three different irradiations of excitation: 100 fs at 835 nm, 120 ps at 532 nm, and 150 ps at 1064 nm. The as-grown samples showed a saturable optical absorption that evolves into two-photon absorption transitions by a picosecond optical annealing phenomenon induced at 532 nm wavelength. Potential applications for developing optical encryption functions were considered.
KW - Non-linear optics
KW - ZnO
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=84994101822&partnerID=8YFLogxK
U2 - 10.1080/09500340.2016.1253880
DO - 10.1080/09500340.2016.1253880
M3 - Artículo
SN - 0950-0340
VL - 64
SP - 601
EP - 608
JO - Journal of Modern Optics
JF - Journal of Modern Optics
IS - 6
ER -