The Influence of Excitation Density on Laser Induced White Lighting of Wide-Band-Gap Semiconductor ZnSe:Yb Polycrystallite Ceramics | Zendy

Robert Tomala | Zendy; Yuriy Gerasymchuk | Zendy; D. Hreniak | Zendy; J. Legendziewicz | Zendy; W. Strȩk | Zendy

Open Access

The Influence of Excitation Density on Laser Induced White Lighting of Wide-Band-Gap Semiconductor ZnSe:Yb Polycrystallite Ceramics

Author(s) -

Robert Tomala,

Yuriy Gerasymchuk,

D. Hreniak,

J. Legendziewicz,

W. Strȩk

Publication year - 2019

Publication title -

ecs journal of solid state science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.488

H-Index - 51

eISSN - 2162-8777

pISSN - 2162-8769

DOI - 10.1149/2.0362001jss

Subject(s) - materials science , excitation , laser , power density , diode , optoelectronics , semiconductor , laser diode , optics , atomic physics , power (physics) , physics , quantum mechanics

The irradiation of ZnSe:Yb polycrystalline ceramics by focused beam of a CW 975 nm laser diode in vacuum conditions leads to generation intense white light in visible range. The emission band was centered at 630 nm. The intensity of white emission increased exponentially with the power density of incident laser light. The influence of excitation power density on generation of broadband emission was investigated. It was found that with increasing excitation power density the total intensity and the slope of exponential enhancement of white light significantly increase. Moreover, for the highest excitation power density there appeared by excitation threshold. The impact of excitation density on white laser induced white emission (LIWE) was discussed in terms of multiphoton excitation and avalanche ionization

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