Browsing by Author "Lin, Shiuan H."

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Optical, magneto-optical and holographic study of Bi4Ge3O12 crystals doped with transition elements
(2006-01-01)
Petkova, Petya
;
Marinova, Vera
;
Iliev, Ilia
;
Dimov, Todor
;
Lin, Shiuan H.
Bismuth germanate Bi3Ge4O12 (BGO) single crystals doped with ruthenium, manganese and ruthenium plus manganese are gown by Czohralski technique with automatically diameter-weight control method. The effect of doping on the light-induced, magneto-optical and holographic properties of BGO single crystals is studied. It was found that the optical transmission spectrum of doped samples is modified strongly under thermal annealing and homogeneous illumination with UV light as well as the photochromic effect is fully reversible. The magneto-optical rotation was measured and Verdet constant was calculated at visible spectral range. Holographic grating are successfully recorded at 633 nm.
Ruthenium and Rhodium doped sillenite crystals: holographic properties and applications at near-infrared spectral range
(2013)
Marinova, Vera
;
Hsu, Ken Y.
;
Lin, Shiuan H.
;
Liu, Ren C.
;
Lin, Yu H.
We report an improvement of the response time and near infrared sensitivity of sillenite crystals Bi12SiO20 (BSO), Bi12TiO20 (BTO) doped with transition metal ions as Ru and Rh. Real-time holographic recording is performed at 1064 nm at a diffusion regime. By using 532 nm light for pre-excitation, significant operation speed of 20 ms is achieved in case of Rh-doped BTO crystal. Further, a possibility to combine doped sillenite plates with liquid crystal into a organic/inorganic hybrid devices (Liquid Crystal Light Valves) is demonstrated, which opens many prospects for further near infrared photonic applications.