Low voltage operation of electro-absorption modulator promising for high-definition 3D imaging application using a three step asymmetric coupled quantum well structure

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In this paper, we propose a transmission type electro-absorption modulator (EAM) operating at 850 nm having low operating voltage and high absorption change with low insertion loss using a novel three step asymmetric coupled quantum well (3 ACQW) structure which can be used as an optical image shutter for high-definition (HD) three dimensional (3D) imaging. Theoretical calculations show that the exciton red shift of 3 ACQW structure is more than two times larger than that of rectangular quantum well (RQW) structure while maintaining high absorption change. The EAM having coupled cavities with 3 ACQW structure shows a wide spectral bandwidth and high amplitude modulation at a bias voltage of only -8V, which is 41% lower in operating voltage than that of RQW, making the proposed EAM highly attractive as an optical image shutter for HD 3D imaging applications.
Publisher
Institute of Physics Publishing
Issue Date
2014-08
Language
English
Citation

3rd International Conference on Mathematical Modeling in Physical Sciences, IC-MSQUARE 2014

DOI
10.1088/1742-6596/574/1/012171
URI
http://hdl.handle.net/10203/216653
Appears in Collection
ME-Conference Papers(학술회의논문)
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