Pub Date : 2026-02-06DOI: 10.1016/j.optcom.2026.132979
Wei Liu, Chengrui Yan, Di Wang, Zeyu Liu, Bohan Shi, Runzhi Wang, Yujia Liu
In this study, the optoelectronic characteristics of red light-emitting InGaN/GaN multiple quantum wells (MQWs) with an AlGaN layer inserted into a GaN barrier are investigated numerically. It is demonstrated that the polarization effect in InGaN QWs can be enhanced due to inserted AlGaN layer in barriers, leading to a redshift of the luminescence peak wavelength from 631.8 nm to 640.6 nm. Furthermore, compared to the traditional InGaN/GaN MQW structure, the utility of barriers with an AlGaN insertion layer can improve the uniformity of carrier distribution and increase the carrier concentration in the MQW active region by more than 35%, resulting in the enhancement of luminescence intensity by 10%. Especially, for the MQW sample where the Al content in the AlGaN insertion layer increases along the epitaxial growth direction, the luminescence intensity is the highest and the peak wavelength is the largest.
{"title":"Effect of AlGaN insertion layer in barriers on the optoelectronic characteristics of red light-emitting InGaN/GaN multi-quantum wells","authors":"Wei Liu, Chengrui Yan, Di Wang, Zeyu Liu, Bohan Shi, Runzhi Wang, Yujia Liu","doi":"10.1016/j.optcom.2026.132979","DOIUrl":"10.1016/j.optcom.2026.132979","url":null,"abstract":"<div><div>In this study, the optoelectronic characteristics of red light-emitting InGaN/GaN multiple quantum wells (MQWs) with an AlGaN layer inserted into a GaN barrier are investigated numerically. It is demonstrated that the polarization effect in InGaN QWs can be enhanced due to inserted AlGaN layer in barriers, leading to a redshift of the luminescence peak wavelength from 631.8 nm to 640.6 nm. Furthermore, compared to the traditional InGaN/GaN MQW structure, the utility of barriers with an AlGaN insertion layer can improve the uniformity of carrier distribution and increase the carrier concentration in the MQW active region by more than 35%, resulting in the enhancement of luminescence intensity by 10%. Especially, for the MQW sample where the Al content in the AlGaN insertion layer increases along the epitaxial growth direction, the luminescence intensity is the highest and the peak wavelength is the largest.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132979"},"PeriodicalIF":2.5,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172482","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}
We propose a planar, prism-coupled Weyl-semimetal (WSM) interface that enables nonreciprocal Goos–Hänchen (GH) amplification via direction-dependent reflection-phase winding. The WSM/air/WSM stack supports narrow angular resonances with abrupt phase wraps in the TM reflection coefficient, which convert into giant lateral beam displacements for opposite in-plane propagation directions. For representative mid-infrared operation, we obtain peak normalized shifts up to , with repeated polarity switching near resonance. A pronounced nonreciprocal response is observed by selecting an operating angle at which one direction is resonant while the counter-propagating direction is off-resonant, yielding a displacement contrast exceeding within a sub- angular window. The effect is broadly reconfigurable: tuning the wavelength from to relocates the giant-shift resonances across °–17°, varying the air-gap thickness from to reshapes the coupling linewidths and shifts the extrema by several degrees, and rotating the azimuthal angle from to reorients the in-plane momentum relative to the WSM gyrotropy axis, enabling controllable direction selectivity and sign reversal. These results establish WSM interfaces as a compact, lithography-free platform for displacement-based nonreciprocal beam steering, isolation-like discrimination, and high-contrast sensing in the mid-infrared.
{"title":"Breaking reciprocity via beam shifts in Weyl Semimetal Interfaces with nonreciprocal Goos-Hänchen amplification","authors":"Yuliang Zhi , Xin Cui , Fenglin Xian , Shixin Pei , Gaige Zheng","doi":"10.1016/j.optcom.2026.133002","DOIUrl":"10.1016/j.optcom.2026.133002","url":null,"abstract":"<div><div>We propose a planar, prism-coupled Weyl-semimetal (WSM) interface that enables nonreciprocal Goos–Hänchen (GH) amplification via direction-dependent reflection-phase winding. The WSM/air/WSM stack supports narrow angular resonances with abrupt phase wraps in the TM reflection coefficient, which convert into giant lateral beam displacements for opposite in-plane propagation directions. For representative mid-infrared operation, we obtain peak normalized shifts up to <span><math><mrow><mrow><mo>|</mo><mi>G</mi><mo>|</mo></mrow><mo>/</mo><mi>λ</mi><mo>=</mo><mn>7</mn><mo>.</mo><mn>5</mn><mo>×</mo><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>, with repeated polarity switching near resonance. A pronounced nonreciprocal response is observed by selecting an operating angle at which one direction is resonant while the counter-propagating direction is off-resonant, yielding a displacement contrast exceeding <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> within a sub-<span><math><mrow><mn>0</mn><mo>.</mo><mn>1</mn><mo>°</mo></mrow></math></span> angular window. The effect is broadly reconfigurable: tuning the wavelength from <span><math><mrow><mi>λ</mi><mo>=</mo><mn>12</mn></mrow></math></span> to <span><math><mrow><mn>17</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> relocates the giant-shift resonances across <span><math><mrow><mi>θ</mi><mo>=</mo><mn>10</mn></mrow></math></span>°–17°, varying the air-gap thickness from <span><math><mrow><mi>d</mi><mo>=</mo><mn>7</mn></mrow></math></span> to <span><math><mrow><mn>13</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> reshapes the coupling linewidths and shifts the extrema by several degrees, and rotating the azimuthal angle from <span><math><mrow><mi>φ</mi><mo>=</mo><mn>45</mn><mo>°</mo></mrow></math></span> to <span><math><mrow><mn>180</mn><mo>°</mo></mrow></math></span> reorients the in-plane momentum <span><math><msub><mrow><mi>k</mi></mrow><mrow><mo>∥</mo></mrow></msub></math></span> relative to the WSM gyrotropy axis, enabling controllable direction selectivity and sign reversal. These results establish WSM interfaces as a compact, lithography-free platform for displacement-based nonreciprocal beam steering, isolation-like discrimination, and high-contrast sensing in the mid-infrared.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 133002"},"PeriodicalIF":2.5,"publicationDate":"2026-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172439","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 : 2026-02-05DOI: 10.1016/j.optcom.2026.132988
Ruofan Cai , Feng Zhou , Weining Chen , Hongyan Wang , Yuchen Ge , Qingsheng Xie , Yaohong Chen
Atmospheric turbulence is one of the most devastating degradation factors in long-focus, long-range infrared imaging systems. Most existing turbulence mitigation methods are developed for visible light scenarios, while research targeting infrared scenarios remains scarce. In this paper, we propose a two-stage infrared image enhancement turbulence method, which combines an enhanced Difference of Gaussian (DoG) filtering module and a deep neural network to restore infrared images degraded by atmospheric turbulence. This approach mitigates blurring and geometric distortion caused by atmospheric turbulence and significantly improves the image quality, which is also applicable to moving objects. Experiments on synthetic and real-world turbulence datasets demonstrate the proposed method's strong restoration and enhancement performance, which achieves improvements of 3.7% in Peak Signal-to-Noise Ratio (PSNR) and 2.6% in Structural Similarity Index (SSIM) compared with state-of-the-art methods, with a processing rate of approximately 27 fps for 640 × 512 short-wave infrared images.
{"title":"A two-stage framework for infrared image enhancement under long-range turbulence","authors":"Ruofan Cai , Feng Zhou , Weining Chen , Hongyan Wang , Yuchen Ge , Qingsheng Xie , Yaohong Chen","doi":"10.1016/j.optcom.2026.132988","DOIUrl":"10.1016/j.optcom.2026.132988","url":null,"abstract":"<div><div>Atmospheric turbulence is one of the most devastating degradation factors in long-focus, long-range infrared imaging systems. Most existing turbulence mitigation methods are developed for visible light scenarios, while research targeting infrared scenarios remains scarce. In this paper, we propose a two-stage infrared image enhancement turbulence method, which combines an enhanced Difference of Gaussian (DoG) filtering module and a deep neural network to restore infrared images degraded by atmospheric turbulence. This approach mitigates blurring and geometric distortion caused by atmospheric turbulence and significantly improves the image quality, which is also applicable to moving objects. Experiments on synthetic and real-world turbulence datasets demonstrate the proposed method's strong restoration and enhancement performance, which achieves improvements of 3.7% in Peak Signal-to-Noise Ratio (PSNR) and 2.6% in Structural Similarity Index (SSIM) compared with state-of-the-art methods, with a processing rate of approximately 27 fps for 640 × 512 short-wave infrared images.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132988"},"PeriodicalIF":2.5,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172512","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 : 2026-02-05DOI: 10.1016/j.optcom.2026.133000
Hang Chen , Yuchen Zhao , Moyao Yu , Haitao Yang , Zhengjun Liu , Fei Tong
A novel optical image cryptosystem combining extended fractional Fourier transform, Fresnel diffraction, phase modulation and chaotic systems has been proposed in this paper. Due to the nonlinear phase encoding and chaotic scrambling in the color image encryption process, the security of the cryptosystem is strengthened. The system adopts random phase masks, the relative positions of the double-lens system, the propagation distance, and the initial values of chaotic mapping as keys, which strengthen confidentiality. The proposed cryptosystem can be implemented by an electro-optical hybrid setup. Some numerical simulations are implemented to testify the validity and robustness of the proposed cryptosystem for multiple images.
{"title":"Optical color image cryptosystem based on fresnel diffraction and phase modulation in extended fractional Fourier transform domain","authors":"Hang Chen , Yuchen Zhao , Moyao Yu , Haitao Yang , Zhengjun Liu , Fei Tong","doi":"10.1016/j.optcom.2026.133000","DOIUrl":"10.1016/j.optcom.2026.133000","url":null,"abstract":"<div><div>A novel optical image cryptosystem combining extended fractional Fourier transform, Fresnel diffraction, phase modulation and chaotic systems has been proposed in this paper. Due to the nonlinear phase encoding and chaotic scrambling in the color image encryption process, the security of the cryptosystem is strengthened. The system adopts random phase masks, the relative positions of the double-lens system, the propagation distance, and the initial values of chaotic mapping as keys, which strengthen confidentiality. The proposed cryptosystem can be implemented by an electro-optical hybrid setup. Some numerical simulations are implemented to testify the validity and robustness of the proposed cryptosystem for multiple images.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 133000"},"PeriodicalIF":2.5,"publicationDate":"2026-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172472","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}
We report a modified chirally-coupled-core (3C) fiber with a large-diameter, low-numerical-aperture (NA) side-core design, inspired by our observation that quasi-phase-matching resonance critically depends on the side-core mode order and diameter. In particular, resonance with the side-core LP11 mode enables efficient high-order mode (HOM) leakage while preserving low fundamental-mode (FM) loss in the central core. The designed fiber can achieve a minimum FM loss of 0.08 dB/m, while maintaining high HOM loss (>10 dB/m) for the LP11 group, and offers a broad operating window of 300 nm, significantly outperforming conventional circular-core 3C fibers. With optimized bending, the fiber can sustain heat loads up to 120 W/m. The design is also scalable: introducing additional large-diameter side-cores allows the central-core diameter to be increased up to 50 μm while preserving effective HOM suppression and low FM loss. This work provides insights into the mechanistic and structural behavior of 3C fibers and proposes an optimized fiber design suitable for high-power laser amplification and transmission applications.
{"title":"Low loss, broad bandwidth and good heat load tolerance in a modified chirally-coupled-core fiber with large-diameter and low-NA side-core design","authors":"Yifeng Hong, Jianchang Tan, He Hao, Jiabin Bai, Zupei Zhan, Dong Li, Shuiliang Zhou","doi":"10.1016/j.optcom.2026.132981","DOIUrl":"10.1016/j.optcom.2026.132981","url":null,"abstract":"<div><div>We report a modified chirally-coupled-core (3C) fiber with a large-diameter, low-numerical-aperture (NA) side-core design, inspired by our observation that quasi-phase-matching resonance critically depends on the side-core mode order and diameter. In particular, resonance with the side-core LP<sub>11</sub> mode enables efficient high-order mode (HOM) leakage while preserving low fundamental-mode (FM) loss in the central core. The designed fiber can achieve a minimum FM loss of 0.08 dB/m, while maintaining high HOM loss (>10 dB/m) for the LP<sub>11</sub> group, and offers a broad operating window of 300 nm, significantly outperforming conventional circular-core 3C fibers. With optimized bending, the fiber can sustain heat loads up to 120 W/m. The design is also scalable: introducing additional large-diameter side-cores allows the central-core diameter to be increased up to 50 μm while preserving effective HOM suppression and low FM loss. This work provides insights into the mechanistic and structural behavior of 3C fibers and proposes an optimized fiber design suitable for high-power laser amplification and transmission applications.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132981"},"PeriodicalIF":2.5,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172438","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 : 2026-02-04DOI: 10.1016/j.optcom.2026.132990
Muhammad Idrees , Yuanping Chen , Beibing Huang , Hui-Jun Li , Zareen A. Khan , Yuee Xie
We theoretically investigate ultrahigh-resolution two-dimensional (2D) atomic localization in a hybrid nanosystem composed of metallic nanoparticles (MNPs) embedded in a coherent three-level -type atomic medium serving as a dielectric host. Structured laser fields excite tunable surface plasmon polaritons (SPPs) at the MNP-dielectric interface, with resonances analytically derived from Maxwell’s equations under suitable boundary conditions. The atomic dynamics are described via the density matrix formalism, where the control-field Rabi frequency is modeled as a superposition of two orthogonal standing waves along the - and -directions, characterized by azimuthal quantum numbers and spatial phase shifts. The spatially dependent light-matter interaction, together with phase modulation, generates sharply localized probability peaks within a single-wavelength domain, marking high-probability atomic positions. By tuning azimuthal quantum numbers, and the phase parameters, the spatial symmetry is enhanced while the number of localized peaks is reduced, ultimately yielding a single dominant localization site with higher probability. This approach achieves ultrahigh-resolution localization in regions smaller than , representing a significant improvement over previous schemes. The resulting tunable probability distributions provide a versatile platform for precision atomic localization in quantum nanoplasmonics, with potential applications in nanophotonics, nanomedicine, and quantum information processing.
{"title":"Plasmon-enhanced two-dimensional atomic localization with controllable azimuthal symmetry","authors":"Muhammad Idrees , Yuanping Chen , Beibing Huang , Hui-Jun Li , Zareen A. Khan , Yuee Xie","doi":"10.1016/j.optcom.2026.132990","DOIUrl":"10.1016/j.optcom.2026.132990","url":null,"abstract":"<div><div>We theoretically investigate ultrahigh-resolution two-dimensional (2D) atomic localization in a hybrid nanosystem composed of metallic nanoparticles (MNPs) embedded in a coherent three-level <span><math><mi>λ</mi></math></span>-type atomic medium serving as a dielectric host. Structured laser fields excite tunable surface plasmon polaritons (SPPs) at the MNP-dielectric interface, with resonances analytically derived from Maxwell’s equations under suitable boundary conditions. The atomic dynamics are described via the density matrix formalism, where the control-field Rabi frequency is modeled as a superposition of two orthogonal standing waves along the <span><math><mi>x</mi></math></span>- and <span><math><mi>y</mi></math></span>-directions, characterized by azimuthal quantum numbers and spatial phase shifts. The spatially dependent light-matter interaction, together with phase modulation, generates sharply localized probability peaks within a single-wavelength domain, marking high-probability atomic positions. By tuning azimuthal quantum numbers, and the phase parameters, the spatial symmetry is enhanced while the number of localized peaks is reduced, ultimately yielding a single dominant localization site with higher probability. This approach achieves ultrahigh-resolution localization in regions smaller than <span><math><mrow><mi>λ</mi><mo>/</mo><mn>30</mn><mo>×</mo><mi>λ</mi><mo>/</mo><mn>30</mn></mrow></math></span>, representing a significant improvement over previous schemes. The resulting tunable probability distributions provide a versatile platform for precision atomic localization in quantum nanoplasmonics, with potential applications in nanophotonics, nanomedicine, and quantum information processing.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132990"},"PeriodicalIF":2.5,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172480","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 : 2026-02-04DOI: 10.1016/j.optcom.2026.132994
Renhao Deng , Qiupin Wang , Ziyi Kang , Pu Ou , Yingke Xie , Dan Lu , Junqi Liu , Zhengmao Wu , Guangqiong Xia
In this work, we propose and experimentally demonstrate a scheme for generating chaotic signals with tunable bandwidth by coupling a distributed feedback laser diode (DFB-LD) to a Si3N4 microring resonator (MRR). In such a scheme, the MRR is utilized as an external cavity for the DFB-LD and provides a wavelength-dependent optical feedback. The reflection response of the MRR is composed of a back-reflection of the bus waveguide facets and a ring waveguide. The former induces sinusoidal modulation of the MRR transmission and reflection, and the latter leads to a narrowband reflection feature that interferes with the facet back-reflection. Via analyzing the time-series, RF spectra, and optical spectra of these outputs, the dynamic states of DFB-LD can be determined under different bias current (IDFB-LD) and attenuation rate (α) of feedback light from the MRR to the DFB-LD. Two cases are investigated: Case I is that the back-reflection of the bus waveguide facets is dominant, and Case II is that two back-reflection pathways interfere. The experimental results show that, under Case I, multiple dynamic states can be observed under different IDFB-LD and α, and the evolution route of the period one (P1) state to chaotic (CO) state is revealed. In particular, when the laser operates at the CO state, the bandwidth of the chaotic signals is highly dependent on IDFB-LD and α. By varying IDFB-LD from 80.00 mA to 130.00 mA and α from 6.97% to 19.2%, the effective bandwidth (EB) of the chaotic signal can be changed within a range of 17.69 GHz to 22.98 GHz. For IDFB-LD and α fixed at 105.00 mA and 7.66%, respectively, the chaotic signals with a maximum EB of 22.98 GHz can be achieved. Under Case II, the DFB-LD is easy to enter a tight locking state with only a minuscule reflection provided by the MRR.
{"title":"Generation of tunable bandwidth chaotic signals using a DFB-LD coupled with a microring resonator","authors":"Renhao Deng , Qiupin Wang , Ziyi Kang , Pu Ou , Yingke Xie , Dan Lu , Junqi Liu , Zhengmao Wu , Guangqiong Xia","doi":"10.1016/j.optcom.2026.132994","DOIUrl":"10.1016/j.optcom.2026.132994","url":null,"abstract":"<div><div>In this work, we propose and experimentally demonstrate a scheme for generating chaotic signals with tunable bandwidth by coupling a distributed feedback laser diode (DFB-LD) to a Si<sub>3</sub>N<sub>4</sub> microring resonator (MRR). In such a scheme, the MRR is utilized as an external cavity for the DFB-LD and provides a wavelength-dependent optical feedback. The reflection response of the MRR is composed of a back-reflection of the bus waveguide facets and a ring waveguide. The former induces sinusoidal modulation of the MRR transmission and reflection, and the latter leads to a narrowband reflection feature that interferes with the facet back-reflection. Via analyzing the time-series, RF spectra, and optical spectra of these outputs, the dynamic states of DFB-LD can be determined under different bias current (I<sub>DFB-LD</sub>) and attenuation rate (α) of feedback light from the MRR to the DFB-LD. Two cases are investigated: Case I is that the back-reflection of the bus waveguide facets is dominant, and Case II is that two back-reflection pathways interfere. The experimental results show that, under Case I, multiple dynamic states can be observed under different I<sub>DFB-LD</sub> and α, and the evolution route of the period one (P1) state to chaotic (CO) state is revealed. In particular, when the laser operates at the CO state, the bandwidth of the chaotic signals is highly dependent on I<sub>DFB-LD</sub> and α. By varying I<sub>DFB-LD</sub> from 80.00 mA to 130.00 mA and α from 6.97% to 19.2%, the effective bandwidth (EB) of the chaotic signal can be changed within a range of 17.69 GHz to 22.98 GHz. For I<sub>DFB-LD</sub> and α fixed at 105.00 mA and 7.66%, respectively, the chaotic signals with a maximum EB of 22.98 GHz can be achieved. Under Case II, the DFB-LD is easy to enter a tight locking state with only a minuscule reflection provided by the MRR.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132994"},"PeriodicalIF":2.5,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172477","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 : 2026-02-04DOI: 10.1016/j.optcom.2026.132995
Lina Zhou , Hongyun Chen , Shuyao Lei , Caihua Nie , Pengshun Luo
Magnonic frequency combs (MFC), similar to optical frequency combs (OFC), are a set of equidistant frequencies generated through the magnetostrictive effect in cavity magnomechanics (CM). In this paper, we propose a new kind of frequency combs in ferromagnetic yttrium iron garnet (YIG), i.e. the fraction-order MFC, which can be generated in cavity magnomechanical system driven by a control field and two probe fields. We specifically explore the MFC, with a particular emphasis on the enhancement of magnon squeezing in fractional MFC. Additionally, we find that under certain conditions, a stronger probe field results in more lines of the MFC spectrum. These results enhance our understanding of magnetostrictive interactions and magnon squeezing, laying a solid foundation for the application of cavity magnetomechanics of magnon squeezing in precision measurement.
{"title":"Magnon-squeezing-enhanced fractional magnonic frequency combs in cavity magnomechanics","authors":"Lina Zhou , Hongyun Chen , Shuyao Lei , Caihua Nie , Pengshun Luo","doi":"10.1016/j.optcom.2026.132995","DOIUrl":"10.1016/j.optcom.2026.132995","url":null,"abstract":"<div><div>Magnonic frequency combs (MFC), similar to optical frequency combs (OFC), are a set of equidistant frequencies generated through the magnetostrictive effect in cavity magnomechanics (CM). In this paper, we propose a new kind of frequency combs in ferromagnetic yttrium iron garnet (YIG), i.e. the fraction-order MFC, which can be generated in cavity magnomechanical system driven by a control field and two probe fields. We specifically explore the MFC, with a particular emphasis on the enhancement of magnon squeezing in fractional MFC. Additionally, we find that under certain conditions, a stronger probe field results in more lines of the MFC spectrum. These results enhance our understanding of magnetostrictive interactions and magnon squeezing, laying a solid foundation for the application of cavity magnetomechanics of magnon squeezing in precision measurement.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132995"},"PeriodicalIF":2.5,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172442","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 : 2026-02-04DOI: 10.1016/j.optcom.2026.132998
Muhammad Ikram , Shaohua Tao , Muhammad Akram
Active control of chiroptical response in plasmonic systems is pivotal for next-generation optical isolators, chiroptical sensors and magnetically reconfigurable meta-surfaces, yet simultaneous electrical and magnetic tunability with sub-degree angular resolution remains elusive. Here we demonstrate giant, angle-resolved magnetic field assisted CD modulation in an epsilon-shaped achiral plasmonic nanoantenna evaporated onto magnetically anisotropic Ce:YIG. Under oblique circularly-polarized excitation, the structure exhibits extrinsic chirality which can be modulated on demand by an in-plane magnetic field of only a few mT. A rigorous coupled-wave analysis reveals that the CD amplitude increases monotonically with incidence angle up to 45°. A mechanism elucidating extrinsic CD due to oblique incidence is established. Notably, due to magnetic anisotropy of Ce:YIG, CD modulation with in-plane magnetic field surpasses that with out-of-plane magnetic field. The calculated in-plane magnetic sensitivity is about 58 times larger than its out-of-plane counterpart. The proposed magnetoplasmonic system is CMOS-compatible, operates at room temperature and requires <1 mW optical power, offering a scalable platform for atto-molar enantiomer detection, on-chip Faraday isolators and magnetically addressable chiral photonic circuits and sensors.
{"title":"Anisotropic variation in chiroptical response of plasmonic nanostructure in in-plane and out-of-plane magnetic fields","authors":"Muhammad Ikram , Shaohua Tao , Muhammad Akram","doi":"10.1016/j.optcom.2026.132998","DOIUrl":"10.1016/j.optcom.2026.132998","url":null,"abstract":"<div><div>Active control of chiroptical response in plasmonic systems is pivotal for next-generation optical isolators, chiroptical sensors and magnetically reconfigurable meta-surfaces, yet simultaneous electrical and magnetic tunability with sub-degree angular resolution remains elusive. Here we demonstrate giant, angle-resolved magnetic field assisted CD modulation in an epsilon-shaped achiral plasmonic nanoantenna evaporated onto magnetically anisotropic Ce:YIG. Under oblique circularly-polarized excitation, the structure exhibits extrinsic chirality which can be modulated on demand by an in-plane magnetic field of only a few mT. A rigorous coupled-wave analysis reveals that the CD amplitude increases monotonically with incidence angle up to 45°. A mechanism elucidating extrinsic CD due to oblique incidence is established. Notably, due to magnetic anisotropy of Ce:YIG, CD modulation with in-plane magnetic field surpasses that with out-of-plane magnetic field. The calculated in-plane magnetic sensitivity is about 58 times larger than its out-of-plane counterpart. The proposed magnetoplasmonic system is CMOS-compatible, operates at room temperature and requires <1 mW optical power, offering a scalable platform for atto-molar enantiomer detection, on-chip Faraday isolators and magnetically addressable chiral photonic circuits and sensors.</div></div>","PeriodicalId":19586,"journal":{"name":"Optics Communications","volume":"608 ","pages":"Article 132998"},"PeriodicalIF":2.5,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146172470","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 : 2026-02-04DOI: 10.1016/j.optcom.2026.132967
Wei Zhang , Danying Song , Xiting Wang , Nana Yu , Xiaolei Wang , Sixing Xi
This paper proposes a novel cross-layer chaotic encryption and reversible hiding scheme to address the security requirements of three-dimensional (3D) information. The scheme combines a layer-oriented iterative angular spectrum method with chaotic keys and high-complexity chaotic sequences generated by a five-dimensional Hamiltonian conservative chaotic system (FHCCS) to process 3D information. It disrupts the spatial correlation of 3D information through cross-layer scrambling and diffusion encryption. Subsequently, the encrypted information is losslessly embedded into a color carrier image using an improved reversible data hiding scheme in encrypted images using parametric binary tree labeling (IPBTL-RDHEI) for storage and transmission. With the correct keys, the 3D information can be extracted and decrypted, enabling high-quality optical reconstruction. Thus, the proposed encryption scheme integrates both optical and chaotic key mechanisms, offering a novel and practical solution for privacy protection and secure transmission of 3D information.
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