Polarization reversal induced by heating-cooling cycles in MgO doped lithium niobate crystals
نویسندگان
چکیده
منابع مشابه
X-ray-induced conductivity in iron-doped lithium niobate crystals
Illumination of photorefractive, iron-doped lithium niobate crystals (LiNbO3 :Fe) with x-rays generates a conductivity that we determine from the speed of hologram erasure. The doping levels of the crystals and the acceleration voltage of our x-ray tube are varied. A theoretical model is presented, which describes the obtained results. A decrease of the conductivity with increasing Fe concentra...
متن کاملPyroelectrically induced photorefractive damage in magnesium-doped lithium niobate crystals
Judith R. Schwesyg,* Matthias Falk, Chris R. Phillips, Dieter H. Jundt, Karsten Buse, and Martin M. Fejer E. L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA Institute of Physics, University of Bonn, Wegelerstrasse 8, 53115 Bonn, Germany Crystal Technology, Inc., 1040 East Meadow Circle, Palo Alto, California 94303, USA Institute of Microsystem Technology, University ...
متن کاملLight-Induced Order-of-Magnitude Decrease in the Electric Field for Domain Nucleation in MgO-Doped Lithium Niobate Crystals
周期分極反転素子は,いまや波長変換において欠かせないデバイス であり,その作製技術には高い関心が集まっている.光アシストによ る分極反転法は,従来の櫛型構造電極を用いた分極反転法と比べ,よ り細かい周期の分極反転構造を作製できる方法として注目されてい る.本論文では,下図に示すような光学配置により,ニオブ酸リチウ ム結晶における光照射の分極反転への影響を調べた.著者らは可視光 照射により分極反転ドメインの核形成電場が大幅に減少することを発 見し,その減少率はノンドープ結晶で30%,マグネシウムドープ結 晶で約90%に達するという結果を得ている.また,このような効果 は光照射をしているときのみ起こり,入射する面の方向 (+C面, -C面)には依存しないとも報告している.(図3,表1,文献18) 光アシストによる分極反転のメカニズムは,いまだ解明されていな い部分が多い.本論文のような研...
متن کاملRecent Advances in the Photorefraction of Doped Lithium Niobate Crystals
The recent advances in the photorefraction of doped lithium niobate crystals are reviewed. Materials have always been the main obstacle for commercial applications of photorefractive holographic storage. Though iron-doped LiNbO3 is the mainstay of holographic data storage efforts, several shortcomings, especially the low response speed, impede it from becoming a commercial recording medium. Thi...
متن کاملCharacterization of erbium doped lithium niobate crystals and waveguides
Optical planar waveguides have been fabricated by the titanium in-diffusion process in lithium niobate crystals activated with erbium ions. The waveguides were studied by m-line technique in order to recover the index profile. The effect of the Ti in-diffusion on the structural and spectroscopic properties of the lithium niobate crystals was investigated by Raman and photoluminescence spectrosc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2013
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.4801969