Multilayer heterostructure for privacy protection and electromagnetic wave manipulation based on second harmonic

In this study, the traditional transfer matrix method is integrated with the random-access order algorithm to develop a multi-objective optimization function to alter the electromagnetic waves propagation characteristics within the proposed multilayer heterostructure. Employing the brewster angle in...

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Bibliographic Details
Published in:Optics and laser technology Vol. 192; p. 114031
Main Authors: Xu, Jie, Zhang, Ming-Zhe, Yang, Cheng, Zhang, Hai-Feng
Format: Journal Article
Language:English
Published: Elsevier Ltd 01.12.2025
Subjects:
Angle selection
Electromagnetic waves manipulation
Encoder
Multilayer heterostructure
Privacy protection
Random-access order algorithm
Electromagnetic waves manipulation
Privacy protection
Multilayer heterostructure
Angle selection
Random-access order algorithm
Encoder
ISSN:0030-3992
Online Access:Get full text
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Summary:In this study, the traditional transfer matrix method is integrated with the random-access order algorithm to develop a multi-objective optimization function to alter the electromagnetic waves propagation characteristics within the proposed multilayer heterostructure. Employing the brewster angle in conjunction with second harmonic generation via magnetized ferroelectric crystals, an exact incident angle selection area of 68.7° to 80° is demonstrated on the given multilayer heterostructure, showcasing distinct transmission behaviors for the fundamental and second harmonic waves. The multi-faceted control mechanism is integrated with the piezoresistive materials, harnessing the logic levels of the electromagnetic waves’s incidence angle, external pressure, and transmission difference to manage a tunable coding function. Due to the tunability and transmission properties of the multilayer heterostructure, the privacy protection function can be further used to provide a privacy protection zone of 10.5°. Based on maintaining the function of the encoder, the privacy protection function is successfully combined with it. Therefore, this work establishes a novel groundwork for developing tunable and versatile encoders, broadening the potential for electromagnetic waves manipulation.
ISSN:0030-3992
DOI:10.1016/j.optlastec.2025.114031