Transmissive and reflective type multi-nanolayer electro-optical modulators for chip-to-chip free space optical interconnection: wavelength-scale electromagnetic modelling by the method of single expression

Modulating characteristics of transmissive and reflective Fabry–Perot type multi-nanolayer conductor–dielectric electro-optical modulators (EOMs) for chip-to-chip free space optical interconnection are analyzed via wavelength-scale electromagnetic modelling. For electromagnetic analysis the frequenc...

Full description

Saved in:
Bibliographic Details
Published in:Optical and quantum electronics 2024-07, Vol.56 (8), Article 1328
Main Authors: Baghdasaryan, H. V., Knyazyan, T. M., Hovhannisyan, T. T., Mardoyan, G. R., Baghdasaryan, T., Leitgeb, E., Marciniak, M.
Format: Article
Language:English
Subjects:
Bragg reflectors
Characterization and Evaluation of Materials
Computer Communication Networks
Conduction
Electric contacts
Electrical Engineering
Free space optics
Free-space optical interconnects
Incident radiation
Lasers
Lithium niobates
Modelling
Modulators
Optical Devices
Optical interconnects
Optics
Permittivity
Photonics
Physics
Physics and Astronomy
Reflectance
Semiconductor lasers
Silicon dioxide
Skewed distributions
Thin films
Transmittance
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Modulating characteristics of transmissive and reflective Fabry–Perot type multi-nanolayer conductor–dielectric electro-optical modulators (EOMs) for chip-to-chip free space optical interconnection are analyzed via wavelength-scale electromagnetic modelling. For electromagnetic analysis the frequency-domain method of single expression is used. The considered EOM structures consist of an electro-optical spacer of LiNbO 3 covered by two thin ITO conducting nano-layers, surrounded by Si/SiO 2 distributed Bragg reflectors (DBRs). In the case of transmissive EOM the DBRs are symmetric regarding the spacer, while in the case of reflective EOM they are asymmetric to provide high reflectance for the structure. From four possible types of DBRs the suitable structure has been chosen with layers of higher permittivity adjoining to the ITO nano-layers. ITO nano-layers serving as electric contacts for supplying modulating electrical signal to the electro-optical spacer are parts of the multi-nanolayer structures and are included in the electromagnetic models. An incident radiation from an external laser diode at 1.55 μm wavelength is considered. The optimal configurations of the EOM structures providing a high peak in the transmittance for the transmissive EOM and a narrow dip in the reflectance for the reflective EOM are proposed. Efficiency of optical wave intensity modulation is analyzed by means of influence of electro-optical spacer’s permittivity change on the transmittance and the reflectance of the EOM structures.
ISSN:1572-817X
0306-8919
1572-817X
DOI:10.1007/s11082-024-07251-4