Effect of NaCl on the modulation of LPFG double peak by PDDA/PSS nanomembrane.

In this paper, poly(diallyldimethylammonium chloride)(PDDA)/poly(sodium styrene sulfonate)(PSS) nanomembranes were deposited on the surface of long-period fiber gratings (LPFG) using the electrostatic layer-by-layer (LBL) assembly method, and the effect of NaCl on the modulation of LPFG double peaks by PDDA/PSS nanomembranes was investigated. The principle behind the emergence of double peaks was first explored using coupled mode theory, revealing that changes in the mode effective refractive index(RI) occur as the number of nanomembrane layers increases. The experimental results showed that under the conditions of PDDA with NaCl/PSS without NaCl and PDDA without NaCl/PSS with NaCl, double peaks do not appear in the spectra of LPFG as the number of thin film layers increases.

The Relationship Between EFL Teachers' Personality Traits, Communication Strategies, and Work Engagement.

This review strives to shed light on the related studies on the relationship between English as a Foreign Language (EFL) teachers' personality traits, communication strategies, and their work engagement. The positive correlation between teachers' personality traits and work engagement has been confirmed in the review of the literature. Furthermore, studies have proved the relationship between teachers' communication strategies and personality traits.