Open AccessAnomalous bi-directional scanning electro-optic KTN devices with UV-assisted electron and hole injections
Author(s) -
Chang Jiang Chen,
Annan Shang,
Yun Goo Lee,
Ju Hung Chao,
Ruijia Liu,
Shizhuo Yin,
Robert C. Hoffman
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.404307
Subject(s) - optics , materials science , tantalate , lithium tantalate , optoelectronics , scanning electron microscope , electron , ultraviolet , electro optic effect , lithium niobate , photorefractive effect , potassium niobate , ferroelectricity , electric field , physics , quantum mechanics , dielectric
In this Letter, we reported anomalous electro-optic potassium tantalate niobate (KTN) devices, in which both electrons and holes were injected into the KTN crystal via ultraviolet (UV) illumination-assisted charge injection. This could not only significantly enhance the performance of electro-optic devices (e.g., a 270% increase in the deflection angle in terms of the KTN deflector) but also enable the new bi-directional scanning capability. The results in this work would be very useful for a variety of devices and applications, such as electro-optic based vari-focal lenses.