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Broad-angle polarization-independent transparency in PT-symmetric optical multilayers.

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Bibliographic Details
Title: Broad-angle polarization-independent transparency in PT-symmetric optical multilayers.
Authors: Varvari, Anna A1 (AUTHOR) avarvari@ece.auth.gr, Nye, Nicholas S1 (AUTHOR), Karatzidis, Dimitrios I1 (AUTHOR), Kantartzis, Nikolaos V1 (AUTHOR)
Source: Journal of Physics D: Applied Physics. 2026, Vol. 59 Issue 2, p1-10. 10p.
Subjects: Optical multilayers, Refractive index, Feasibility studies, Translucency (Optics)
Abstract: A parity-time (PT)-symmetric multilayered structure is shown to exhibit near-perfect transparency across a broad angular spectrum for both TE and TM polarizations. With a carefully engineered complex refractive index featuring a small imaginary component ( n I = 0.001 ), the system achieves unity transmission and vanishing reflection over all incidence angles within [ − 40 ∘ , 40 ∘ ] . Importantly, in the TM case, this range extends even further to ± 60 ∘ . This performance is realized entirely within the broken PT-symmetric phase and remains robust under significant parameter deviations. Essentially, the required levels of optical gain and loss fall well within the capabilities of existing materials in the optical regime, rendering the structure experimentally feasible with current fabrication technologies. These findings establish a practical and physically accessible strategy for designing broadband, angle-tolerant, and polarization-independent photonic systems based on non-Hermitian principles. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:A parity-time (PT)-symmetric multilayered structure is shown to exhibit near-perfect transparency across a broad angular spectrum for both TE and TM polarizations. With a carefully engineered complex refractive index featuring a small imaginary component ( n I = 0.001 ), the system achieves unity transmission and vanishing reflection over all incidence angles within [ − 40 ∘ , 40 ∘ ] . Importantly, in the TM case, this range extends even further to ± 60 ∘ . This performance is realized entirely within the broken PT-symmetric phase and remains robust under significant parameter deviations. Essentially, the required levels of optical gain and loss fall well within the capabilities of existing materials in the optical regime, rendering the structure experimentally feasible with current fabrication technologies. These findings establish a practical and physically accessible strategy for designing broadband, angle-tolerant, and polarization-independent photonic systems based on non-Hermitian principles. [ABSTRACT FROM AUTHOR]
ISSN:00223727
DOI:10.1088/1361-6463/ae2ee0