Goos-Hänchen (GH) effect is a fundamental phenomenon in optics. Here we demonstrate theoretically that the surface modes at Parity-time (PT) symmetric interfaces, can induce a giant GH shift at a specific incident angle. It is found that the amplitude of the GH shift can be tuned by adjusting the thickness of the bilayer, and as the thickness grows, its maximum value can go to infinity in theory. The physical mechanism behind this interesting feature is that the surface modes at PT interfaces are quasi-bound states in continuum (BICs), which lead to rapid variation in the phase of the scattered waves. Our work enriches the previous studies about GH effect in PT bilayer structures and provides a way in turn to explore the BICs in non-Hermitian photonic systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/OE.27.007857 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Amphipathic Antimicrobial Peptides Illuminate a Reciprocal Relationship between Self-assembly and Cytolytic Activity.
Angew Chem Int Ed Engl
March 2025
Emory University, Chemistry, 1515 Dickey Drive, 30325, Atlanta, UNITED STATES OF AMERICA.
Amphipathic character, encoded within polar sequence patterns of antimicrobial peptides, is a critical structural feature that influences membrane disruptive behavior. Similarly, polar sequence patterns induce self-assembly of amphipathic peptides, which results in the formation of ordered supramolecular structures. The relationship between self-assembly and membrane activity remains an open question of relevance for the development of effective antimicrobial peptides.
View Article and Find Full Text PDFElectroactive Dressing with Selective Sorption of Exudate Enables Treatment of Complicated Wound.
Adv Mater
March 2025
PCFM Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, P. R. China.
Exudate management and cell activity enhancement are vital to complicated wound healing. However, current exudate management dressings indiscriminately remove exudate, which is detrimental to cell activity enhancement. Herein, a novel class of electroactive bilayer (cMO/PVA) dressing is developed by constructing manganese oxide nanoneedle-clusters decorated commercial carbon cloth (MO), in situ casting polyvinyl alcohol (PVA) hydrogel, and finally charging.
View Article and Find Full Text PDFLight-stimulated paper/polymer bilayer actuators incorporated with photosensitizers for enhanced actuation.
Chem Commun (Camb)
March 2025
Department of Chemical and Biomolecular Engineering, Sogang University, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Republic of Korea.
Photostimulated actuators can be remotely actuated and operated at high speed, making them potential candidates for soft robotics. In this study, a paper-based actuator activated solely by light was developed for weight lifting. A polymer blend, primarily made of agarose-poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS), as a photosensitizer, MXenes and methylene blue (MB) was employed on a paper substrate to produce a bilayer structure using a paintbrush technique.
View Article and Find Full Text PDFSwitching on and off the spin polarization of the conduction band in antiferromagnetic bilayer transistors.
Nat Nanotechnol
March 2025
Department of Quantum Matter Physics, University of Geneva, Geneva, Switzerland.
Antiferromagnetic conductors with suitably broken spatial symmetries host spin-polarized bands, which lead to transport phenomena commonly observed in metallic ferromagnets. In bulk materials, it is the given crystalline structure that determines whether symmetries are broken and spin-polarized bands are present. Here we show that, in the two-dimensional limit, an electric field can control the relevant symmetries.
View Article and Find Full Text PDFIon transport in helical-helical polypeptide polymerized ionic liquid block copolymers.
Nat Commun
March 2025
Department of Materials Science and Engineering, Materials Research Laboratory, University of Illinois Urbana-Champaign, Urbana, IL, USA.
Helical-helical polypeptide polymerized ionic liquid block copolymers (PPIL BCPs) are synthesized to investigate the role of helical structure on self-assembly and ionic conductivity. PPIL BCPs, consisting of a cationic polypeptide (PTPLG) with bis(trifluoromethane sulfonimide) (TFSI) counterion and varying lengths connected to a length-fixed neutral poly-(γ-benzyl--glutamate) (PBLG) block, exhibit stable helical conformations with minimal glass transition (T) variation. Here, we show that increasing PIL composition leads to a transition from poorly ordered to highly ordered lamellar (LAM) structures with the highest PIL content BCP forming a bilayer LAM structure with close-packed helices.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!