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Proceedings Paper

II-VI electro-optical devices for visible-wavelength modulation
Author(s): Harald Babucke; Peter Thiele; Michael Rabe; Torsten Prasse; Fritz Henneberger
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Paper Abstract

Electro-absorptive and electro-refractive modulation and switching are shown using various proof-of-concept devices at room temperature. In a multiple quantum well structure, the field-induced broadening of the confined excitons leads to a transmission change of more than 30 percent. The Pockels effect is used to modulate and switch blue-green light by means of MBE-grown ZnSe waveguides with cladding layers of (Zn,Mn)Se on n-GaAs substrates. In a retarder geometry, the strained birefringent planar waveguide demonstrates a contrast ratio larger than 80:1 at 2.485 eV. Applying the electric filed via stripe-contacts on the top cladding layer, the waveguiding for TE-polarized light can be confined in lateral direction. In the center of the lateral waveguide channel, the contrast ratio is better than 16:1 at 2.48 eV. Switching between adjacent channels is accomplished with a contrast ratio better than 5:1.

Paper Details

Date Published: 6 June 1997
PDF: 10 pages
Proc. SPIE 2994, Physics and Simulation of Optoelectronic Devices V, (6 June 1997); doi: 10.1117/12.275589
Show Author Affiliations
Harald Babucke, Humboldt-Univ. zu Berlin (Germany)
Peter Thiele, Humboldt-Univ. zu Berlin (Germany)
Michael Rabe, Humboldt-Univ. zu Berlin (Germany)
Torsten Prasse, Humboldt-Univ. zu Berlin (Germany)
Fritz Henneberger, Humboldt-Univ. zu Berlin (Germany)

Published in SPIE Proceedings Vol. 2994:
Physics and Simulation of Optoelectronic Devices V
Marek Osinski; Weng W. Chow, Editor(s)

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