Pub Date : 2026-02-01DOI: 10.1016/j.physleta.2026.131453
Lingfang Yang , Zhifa Shan , Shuping Li
This study proposes a method based on the co-optimisation of phase shift position and coupling coefficient, revealing the variation curves of SMSR affected by random phase at different phase shift positions. Concurrently, it analyses output power variations to ensure high-power output and single-mode yield in continuous-wave distributed feedback (CW-DFB) lasers. Theoretical modelling and numerical simulations demonstrate that stable single-mode characteristics are achieved when the grating phase shift position is 0.33 L from the HR end-face, yielding a single-mode yield approaching its maximum value. Experimental validation confirms the accuracy of the simulation results, whilst also analysing the influence of phase shift position on the laser's output power characteristics.
{"title":"Research on random phase suppression in CW-DFB lasers","authors":"Lingfang Yang , Zhifa Shan , Shuping Li","doi":"10.1016/j.physleta.2026.131453","DOIUrl":"10.1016/j.physleta.2026.131453","url":null,"abstract":"<div><div>This study proposes a method based on the co-optimisation of phase shift position and coupling coefficient, revealing the variation curves of SMSR affected by random phase at different phase shift positions. Concurrently, it analyses output power variations to ensure high-power output and single-mode yield in continuous-wave distributed feedback (CW-DFB) lasers. Theoretical modelling and numerical simulations demonstrate that stable single-mode characteristics are achieved when the grating phase shift position is 0.33 L from the HR end-face, yielding a single-mode yield approaching its maximum value. Experimental validation confirms the accuracy of the simulation results, whilst also analysing the influence of phase shift position on the laser's output power characteristics.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"577 ","pages":"Article 131453"},"PeriodicalIF":2.6,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-30DOI: 10.1016/j.physleta.2026.131439
Yingying Yu, Siyu Ning, Bo Sun
This study explicitly investigates the application of toroidal electric and magnetic dipoles with mutually perpendicular configurations for efficient energy transfer. By aligning the dipoles perpendicularly, we enhance energy transfer through a toroidal dipole pair. Using a combination of theoretical modeling and experimental validation, we examine the mechanism of power transmission along a toroidal dipole chain within an all-dielectric waveguide. Theoretical calculations, supported by principles similar to reciprocity, reveal a significant increase in transmission efficiency due to the perpendicular interaction between toroidal electric and magnetic dipoles. Our experimental results, validated by numerical simulations and microwave tests, demonstrate that the transmission efficiency remains robust, achieving 85% efficiency at a distance of 80 cm, with minimal performance degradation even at longer distances. This work offers new insights into the fundamental role of toroidal dipoles in energy transfer, with promising implications for the design of advanced dielectric waveguide systems.
{"title":"Power transfer in all-dielectric waveguide aided by the toroidal dipole","authors":"Yingying Yu, Siyu Ning, Bo Sun","doi":"10.1016/j.physleta.2026.131439","DOIUrl":"10.1016/j.physleta.2026.131439","url":null,"abstract":"<div><div>This study explicitly investigates the application of toroidal electric and magnetic dipoles with mutually perpendicular configurations for efficient energy transfer. By aligning the dipoles perpendicularly, we enhance energy transfer through a toroidal dipole pair. Using a combination of theoretical modeling and experimental validation, we examine the mechanism of power transmission along a toroidal dipole chain within an all-dielectric waveguide. Theoretical calculations, supported by principles similar to reciprocity, reveal a significant increase in transmission efficiency due to the perpendicular interaction between toroidal electric and magnetic dipoles. Our experimental results, validated by numerical simulations and microwave tests, demonstrate that the transmission efficiency remains robust, achieving 85% efficiency at a distance of 80 cm, with minimal performance degradation even at longer distances. This work offers new insights into the fundamental role of toroidal dipoles in energy transfer, with promising implications for the design of advanced dielectric waveguide systems.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"577 ","pages":"Article 131439"},"PeriodicalIF":2.6,"publicationDate":"2026-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146122671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-29DOI: 10.1016/j.physleta.2026.131422
Vivek Kumar , M.P. Singh , R. Srikanth
The interpretation of quantum mechanics continues to be debated, and quantum nonlocality accentuates the puzzle. Quantum interpretations can be classified broadly into two types: realist interpretations, which assert that quantum states describe objective reality (even if hidden or branching), and subjective interpretations, which treat quantum states as observer-dependent information or beliefs about the system. Here we study the implication of quantum interpretations for causal explanations of Bell nonlocal correlations, and show that a given interpretation type carries an inherent commitment to a preferred causal structure. Specifically, we find that realist interpretations entail a classical causal model, and thus require Fine-Tuning to prevent superluminal signaling, while subjective interpretations are found to entail a framework of nonclassical causal models. The implications of our results for one-way quantum computation and computation-based Bell nonlocality are studied.
{"title":"Quantum interpretations, causality and quantum computation","authors":"Vivek Kumar , M.P. Singh , R. Srikanth","doi":"10.1016/j.physleta.2026.131422","DOIUrl":"10.1016/j.physleta.2026.131422","url":null,"abstract":"<div><div>The interpretation of quantum mechanics continues to be debated, and quantum nonlocality accentuates the puzzle. Quantum interpretations can be classified broadly into two types: <em>realist interpretations</em>, which assert that quantum states describe objective reality (even if hidden or branching), and <em>subjective interpretations</em>, which treat quantum states as observer-dependent information or beliefs about the system. Here we study the implication of quantum interpretations for causal explanations of Bell nonlocal correlations, and show that a given interpretation type carries an inherent commitment to a preferred causal structure. Specifically, we find that realist interpretations entail a classical causal model, and thus require Fine-Tuning to prevent superluminal signaling, while subjective interpretations are found to entail a framework of nonclassical causal models. The implications of our results for one-way quantum computation and computation-based Bell nonlocality are studied.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"576 ","pages":"Article 131422"},"PeriodicalIF":2.6,"publicationDate":"2026-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081868","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-28DOI: 10.1016/j.physleta.2026.131421
Javier E. Contreras-Reyes
Information potential was initially contextualized for adaptive systems training in the information-theoretic learning field to quantify information in probability density functions. Recently, the information potential has been extended to sample sets whose systems are defined by n-dimensional Gaussian random variables. This paper proposes a preservation law that involves information potential and Jensen-variance distance between two n-dimensional Gaussian random variables. The result is applied to stationary Gaussian processes to derive the variance-distance rate (VDR), which only depends on sample size and not on the weighted parameter of Jensen-variance distance. Moreover, a Blackman–Tukey spectral density estimator was used to estimate the VDR between two stationary Gaussian processes. The fractional difference noise process was studied, where an asymptotic form was derived and an upper bound given. The results highlight the good performance of the proposed estimator, as the estimated VDRs closely match the theoretical ones when the fractional difference noise processes are stationary.
{"title":"Preservation law involving information potential and Jensen-variance distance: Application to stationary gaussian processes","authors":"Javier E. Contreras-Reyes","doi":"10.1016/j.physleta.2026.131421","DOIUrl":"10.1016/j.physleta.2026.131421","url":null,"abstract":"<div><div>Information potential was initially contextualized for adaptive systems training in the information-theoretic learning field to quantify information in probability density functions. Recently, the information potential has been extended to sample sets whose systems are defined by <em>n</em>-dimensional Gaussian random variables. This paper proposes a preservation law that involves information potential and Jensen-variance distance between two <em>n</em>-dimensional Gaussian random variables. The result is applied to stationary Gaussian processes to derive the variance-distance rate (VDR), which only depends on sample size and not on the weighted parameter of Jensen-variance distance. Moreover, a Blackman–Tukey spectral density estimator was used to estimate the VDR between two stationary Gaussian processes. The fractional difference noise process was studied, where an asymptotic form was derived and an upper bound given. The results highlight the good performance of the proposed estimator, as the estimated VDRs closely match the theoretical ones when the fractional difference noise processes are stationary.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"576 ","pages":"Article 131421"},"PeriodicalIF":2.6,"publicationDate":"2026-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146070761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.physleta.2026.131423
Y. Li , X.H. Yang , Z. Li , L.R. Li , B.H. Xu , G.B. Zhang , Z.N. Zhang , L. Guo , H. Li , Y.Y. Ma
A theoretical model describing the implosion dynamics of the double-shell capsules for high neutron yield was developed based on the steady-state ablation theory and the strong shock wave theory. An optimal capsule structure for the 100 kJ facility is proposed through a theoretical optimization process, achieving a neutron yield of 9.46 × 1011 with DD fuel in 1D simulations using the radiation hydrodynamic code MULTI. Then the theoretical capsule is optimized further via the combination of random walk and genetic algorithms, leading to a neutron yield of 1.56 × 1012, that is, 65% improvement over the theoretical prediction. Compared to the theoretical optimization results, the machine learning optimization method gives a thinner inner shell and a thicker foam cushion layer, leading to an improved laser drive efficiency. Finally, an optimal capsule design can achieve a fusion yield of 8.46 MJ for DT fuel with a scaled energy of 1.5 MJ by employing hydro-equivalent implosions. The results provide valuable theoretical references for the experimental design of double-shell capsules.
{"title":"Designing double-shell capsules to achieve high neutron yield","authors":"Y. Li , X.H. Yang , Z. Li , L.R. Li , B.H. Xu , G.B. Zhang , Z.N. Zhang , L. Guo , H. Li , Y.Y. Ma","doi":"10.1016/j.physleta.2026.131423","DOIUrl":"10.1016/j.physleta.2026.131423","url":null,"abstract":"<div><div>A theoretical model describing the implosion dynamics of the double-shell capsules for high neutron yield was developed based on the steady-state ablation theory and the strong shock wave theory. An optimal capsule structure for the 100 kJ facility is proposed through a theoretical optimization process, achieving a neutron yield of 9.46 × 10<sup>11</sup> with DD fuel in 1D simulations using the radiation hydrodynamic code MULTI. Then the theoretical capsule is optimized further via the combination of random walk and genetic algorithms, leading to a neutron yield of 1.56 × 10<sup>12</sup>, that is, 65% improvement over the theoretical prediction. Compared to the theoretical optimization results, the machine learning optimization method gives a thinner inner shell and a thicker foam cushion layer, leading to an improved laser drive efficiency. Finally, an optimal capsule design can achieve a fusion yield of 8.46 MJ for DT fuel with a scaled energy of 1.5 MJ by employing hydro-equivalent implosions. The results provide valuable theoretical references for the experimental design of double-shell capsules.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"575 ","pages":"Article 131423"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.physleta.2026.131419
Volodymyr M. Lashkin , Oleg K. Cheremnykh , Alla K. Fedorenko
We derive a generalized equation for three-dimensional (3D) nonlinear Rossby waves in a stratified atmosphere and a generalized Hasegawa-Mima equation for 3D drift waves in plasma in the case of the presence of an additional scalar nonlinearity of the Korteweg-de Vries (KdV) type. After rescaling the spatial variables, these equations have solutions in the form of 3D monopole solitons, and the vector nonlinearities vanish identically. Using the variational method, we obtain an approximate analytical solution that is in good agreement with the numerical one. In the case of Rossby waves, the soliton has a pancake-shaped form, whereas for the drift waves both pancake and almost spherically symmetric solitons are possible.
{"title":"Three-dimensional pancake monopole Rossby soliton and drift soliton in plasmas","authors":"Volodymyr M. Lashkin , Oleg K. Cheremnykh , Alla K. Fedorenko","doi":"10.1016/j.physleta.2026.131419","DOIUrl":"10.1016/j.physleta.2026.131419","url":null,"abstract":"<div><div>We derive a generalized equation for three-dimensional (3D) nonlinear Rossby waves in a stratified atmosphere and a generalized Hasegawa-Mima equation for 3D drift waves in plasma in the case of the presence of an additional scalar nonlinearity of the Korteweg-de Vries (KdV) type. After rescaling the spatial variables, these equations have solutions in the form of 3D monopole solitons, and the vector nonlinearities vanish identically. Using the variational method, we obtain an approximate analytical solution that is in good agreement with the numerical one. In the case of Rossby waves, the soliton has a pancake-shaped form, whereas for the drift waves both pancake and almost spherically symmetric solitons are possible.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"576 ","pages":"Article 131419"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.physleta.2026.131413
Akhtar Munir , Muqaddar Abbas , Zia Uddin , Shi-Hai Dong , Chunfang Wang
We propose a theoretical study of the Goos-Hänchen (GH) shift in a cavity magnomechanical setup with a yttrium iron garnet (YIG) sphere placed within an optical cavity. The bias magnetic field induces magnon modes in the sphere. These magnons interact with cavity photons through the magnetic dipole interaction and with mechanical vibrations via the magnetostrictive effect. By investigating the hybrid magnon-photon modes, we notice two coupling regimes: level repulsion associated with coherent magnon-photon coupling and level attraction associated with dissipative coupling, which results in the formation of exceptional points. Using a transfer matrix technique, we examine the GH shift of the reflected probe beam and show that level repulsion causes positive lateral shifts, whereas level attraction causes significant negative shifts. The GH shift sign switched via magnon-photon and magnon-phonon couplings, enabling non-Hermitian photonics interfaces and sensitive sensors through level repulsion and attraction.
{"title":"Exceptional-point control of the Goos-Hänchen shift in a cavity magnomechanics","authors":"Akhtar Munir , Muqaddar Abbas , Zia Uddin , Shi-Hai Dong , Chunfang Wang","doi":"10.1016/j.physleta.2026.131413","DOIUrl":"10.1016/j.physleta.2026.131413","url":null,"abstract":"<div><div>We propose a theoretical study of the Goos-Hänchen (GH) shift in a cavity magnomechanical setup with a yttrium iron garnet (YIG) sphere placed within an optical cavity. The bias magnetic field induces magnon modes in the sphere. These magnons interact with cavity photons through the magnetic dipole interaction and with mechanical vibrations via the magnetostrictive effect. By investigating the hybrid magnon-photon modes, we notice two coupling regimes: level repulsion associated with coherent magnon-photon coupling and level attraction associated with dissipative coupling, which results in the formation of exceptional points. Using a transfer matrix technique, we examine the GH shift of the reflected probe beam and show that level repulsion causes positive lateral shifts, whereas level attraction causes significant negative shifts. The GH shift sign switched via magnon-photon and magnon-phonon couplings, enabling non-Hermitian photonics interfaces and sensitive sensors through level repulsion and attraction.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"575 ","pages":"Article 131413"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-27DOI: 10.1016/j.physleta.2026.131397
Dongming Liu , Dexin Xia , Tingting Lv , Jian Han , Bing Yu , Jinhui Shi
Integrating switchable and multiple functionalities into a single metasurface is crucial in optical anti-counterfeiting, information multiplexing, and augmented/virtual reality. However, most efforts have focused on functional diversification, making it challenging to balance bandwidth and efficiency. Here, we demonstrate a full-space hybrid metasurface that may implement versatile polarization manipulation by controlling the Fermi level of graphene. The bianisotropic metasurface exhibits high-efficiency dual-broadband asymmetric transmission. Both the preservation and conversion of handedness are simultaneously achieved in adjacent broadband regimes. The underlying physical mechanisms are elucidated through Fabry-Perot-like resonance and near-field distribution. Furthermore, the angular dependence of multiple polarization properties is investigated. The proposed hybrid metasurface enables full-space, high-efficiency and broadband manipulation of circularly polarized waves, facilitating advances in information multiplexing, polarization-sensitive imaging, and encryption.
{"title":"Versatile terahertz metasurface integrated graphene with dual-polarization asymmetric transmission and reflective dual-broadband polarization manipulation of circularly polarized waves","authors":"Dongming Liu , Dexin Xia , Tingting Lv , Jian Han , Bing Yu , Jinhui Shi","doi":"10.1016/j.physleta.2026.131397","DOIUrl":"10.1016/j.physleta.2026.131397","url":null,"abstract":"<div><div>Integrating switchable and multiple functionalities into a single metasurface is crucial in optical anti-counterfeiting, information multiplexing, and augmented/virtual reality. However, most efforts have focused on functional diversification, making it challenging to balance bandwidth and efficiency. Here, we demonstrate a full-space hybrid metasurface that may implement versatile polarization manipulation by controlling the Fermi level of graphene. The bianisotropic metasurface exhibits high-efficiency dual-broadband asymmetric transmission. Both the preservation and conversion of handedness are simultaneously achieved in adjacent broadband regimes. The underlying physical mechanisms are elucidated through Fabry-Perot-like resonance and near-field distribution. Furthermore, the angular dependence of multiple polarization properties is investigated. The proposed hybrid metasurface enables full-space, high-efficiency and broadband manipulation of circularly polarized waves, facilitating advances in information multiplexing, polarization-sensitive imaging, and encryption.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"575 ","pages":"Article 131397"},"PeriodicalIF":2.6,"publicationDate":"2026-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-26DOI: 10.1016/j.physleta.2026.131420
Olcay Altıntaş , Halil Paşalıoğlu
This study presents a high performance broadband microwave absorber utilizing a combination of Halvorsen chaotic trajectories and Julia fractal geometries. By integrating screen-printed resistive ink into a compact, single-layer resonator design, we achieve over 90% absorption efficiency across a continuous 15–40 GHz spectrum. The proposed structure demonstrates exceptional monostatic Radar Cross Section (RCS) reduction, reaching a peak attenuation of 25 dBsm compared to a perfect electric conductor (PEC). Optimization of chaotic control parameters and substrate thickness ensures robust performance. The polarization angle independency from 0° to 90° and incident angle independency up to 40° is maintained. Experimental results, supported by electric field and surface current analysis, validate the effectiveness for complex electromagnetic environments, offering a scalable solution for advanced stealth and aerospace applications.
{"title":"Monostatic RCS analysis of a microwave absorber using Halvorsen chaotic technique and resistive ink","authors":"Olcay Altıntaş , Halil Paşalıoğlu","doi":"10.1016/j.physleta.2026.131420","DOIUrl":"10.1016/j.physleta.2026.131420","url":null,"abstract":"<div><div>This study presents a high performance broadband microwave absorber utilizing a combination of Halvorsen chaotic trajectories and Julia fractal geometries. By integrating screen-printed resistive ink into a compact, single-layer resonator design, we achieve over 90% absorption efficiency across a continuous 15–40 GHz spectrum. The proposed structure demonstrates exceptional monostatic Radar Cross Section (RCS) reduction, reaching a peak attenuation of 25 dBsm compared to a perfect electric conductor (PEC). Optimization of chaotic control parameters and substrate thickness ensures robust performance. The polarization angle independency from 0° to 90° and incident angle independency up to 40° is maintained. Experimental results, supported by electric field and surface current analysis, validate the effectiveness for complex electromagnetic environments, offering a scalable solution for advanced stealth and aerospace applications.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"573 ","pages":"Article 131420"},"PeriodicalIF":2.6,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-01-25DOI: 10.1016/j.physleta.2026.131412
Jiantao Lü , Yongyao Li
Geometric phase can accumulate on idler or signal waves in four-wave mixing (FWM) when the quasi-phase matching (QPM) vector traces a closed trajectory. Previous studies employing circular modulation paths revealed that the geometric phase is highly sensitive to pump depletion, complicating predictable phase control. In this work, we present two novel QPM modulation schemes implemented within a fully nonlinear FWM framework. The full-wedge rotation guarantees that the geometric phase remains invariant and precisely equals the wedge angle, independent of pump depletion. Conversely, the half-wedge rotation establishes a direct linear relationship between the geometric phase and wedge angle, with the proportionality factor dependent on the pump intensity. These modulation schemes significantly mitigate phase fluctuations under various depletion scenarios and offer a controllable approach to phase manipulation. Our results provide a reliable and versatile method for geometric phase engineering in nonlinear optical systems, opening new avenues for pump-driven all-optical control technologies.
{"title":"Robust control and application of geometric phase in four-wave mixing under wedge trajectory","authors":"Jiantao Lü , Yongyao Li","doi":"10.1016/j.physleta.2026.131412","DOIUrl":"10.1016/j.physleta.2026.131412","url":null,"abstract":"<div><div>Geometric phase can accumulate on idler or signal waves in four-wave mixing (FWM) when the quasi-phase matching (QPM) vector traces a closed trajectory. Previous studies employing circular modulation paths revealed that the geometric phase is highly sensitive to pump depletion, complicating predictable phase control. In this work, we present two novel QPM modulation schemes implemented within a fully nonlinear FWM framework. The full-wedge rotation guarantees that the geometric phase remains invariant and precisely equals the wedge angle, independent of pump depletion. Conversely, the half-wedge rotation establishes a direct linear relationship between the geometric phase and wedge angle, with the proportionality factor dependent on the pump intensity. These modulation schemes significantly mitigate phase fluctuations under various depletion scenarios and offer a controllable approach to phase manipulation. Our results provide a reliable and versatile method for geometric phase engineering in nonlinear optical systems, opening new avenues for pump-driven all-optical control technologies.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"576 ","pages":"Article 131412"},"PeriodicalIF":2.6,"publicationDate":"2026-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146081870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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