Results in Optics最新文献_第8页

All-optical diffractive neural networks for three-dimensional gesture recognition 三维手势识别的全光学衍射神经网络

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-16 DOI: 10.1016/j.rio.2026.101041

Yiqiao Yuan , Yuanming Zhao , Mingxu Piao , Zonglin Liang , Zhang Bo , Xinyue Zhao , Chenxiao Li

{"title":"All-optical diffractive neural networks for three-dimensional gesture recognition","authors":"Yiqiao Yuan , Yuanming Zhao , Mingxu Piao , Zonglin Liang , Zhang Bo , Xinyue Zhao , Chenxiao Li","doi":"10.1016/j.rio.2026.101041","DOIUrl":"10.1016/j.rio.2026.101041","url":null,"abstract":"<div><div>All-optical diffractive neural networks (D<sup>2</sup>NN) are a novel class of algorithmic models that leverage optical properties to overcome the limitations of traditional electronic neural networks, achieving higher computational efficiency and lower energy consumption. However, existing D<sup>2</sup>NN studies have primarily focused on objects located on a fixed plane. In real-world applications, targets are not stationary on a single plane, making current theoretical models difficult to apply in practice. To address this issue, this paper proposes a D<sup>2</sup>NN model operating at a wavelength of 1550 nm for targets distributed in three-dimensional space. Building upon the conventional model, the proposed approach incorporates the three-dimensional variations of targets encountered in practical scenarios, thereby enhancing the model’s robustness and applicability for spatially distributed objects. Experimental results show that when the object distance varies within the imaging range of 0.1 m to 1 m, the recognition accuracy of the unmodified model drops significantly once it exceeds the training plane. In contrast, although the improved model performs slightly worse than the traditional model on the specific plane, it maintains an overall recognition accuracy above 70% across the entire distance range. This demonstrates that the improved model proposed in this paper is theoretically more stable than the traditional one, providing a solid foundation for future practical applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101041"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991585","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of an optical fiber end cap for high-power fiber lasers 高功率光纤激光器光纤端盖的研制

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-05-17 DOI: 10.1016/j.rio.2026.101047

Sung Hun Lee, Soon Hwi Hwang, Seong Mook Jeong, Whan Seok Yang

引用次数: 0

Tuning the defect state color centers in CaO powder and wafer by using hard X-ray nanoprobe 用硬x射线纳米探针对CaO粉和晶圆中的缺陷态色心进行了调谐

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-23 DOI: 10.1016/j.rio.2026.101022

Sunny Saurabh , Tzu-Chi Huang , Wei-Lun Wei , Chen-Wei Lin , Yi-Chen Li , Yu-Hao Wu , Chien-Yu Lee , Bo-Yi Chen , Gung-Chian Yin , Mau-Tsu Tang , Bi-Hsuan Lin

引用次数: 0

High stability and low timing jitter passively Q-switched microchip lasers pumped with high repetition-rate square pulses 高稳定性和低时序抖动被动调q微芯片激光器抽运高重复率的方脉冲

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-04-23 DOI: 10.1016/j.rio.2026.101021

Yuxiang Dong , Xingyu Zhu , Xiaoqin Zhu

{"title":"High stability and low timing jitter passively Q-switched microchip lasers pumped with high repetition-rate square pulses","authors":"Yuxiang Dong , Xingyu Zhu , Xiaoqin Zhu","doi":"10.1016/j.rio.2026.101021","DOIUrl":"10.1016/j.rio.2026.101021","url":null,"abstract":"<div><div>High peak-power laser pulses generated in the passively Q-switched (PQS) solid-state lasers have been widely used in material processing, optical communication, imaging, and ranging. PQS microchip lasers are well developed for generating high peak-power, nanosecond or sub-nanosecond pulses, however, it is a big challenge for achieving stable laser pulses in the PQS microchip lasers. Here, PQS microchip lasers are fabricated using Nd:YAG and Cr<sup>4+</sup>:YAG crystals as core components. Specifically, two Nd:YAG crystals with thicknesses of 1 mm and 2 mm serve as gain media, while three Cr<sup>4+</sup>:YAG crystals with distinct thicknesses and initial transmittances function as saturable absorbers. Under high-repetition-rate pulsed laser excitation, the PQS microchip lasers reliably produce highly stable Q-switched laser pulses. The generated laser pulses exhibit amplitude fluctuation and timing jitter of less than 1.5% and 0.7%, respectively. Stable single pulses with 10 μJ energy, 1.6 ns width, and 6.25 kW peak power are achieved in the PQS microchip laser pumped by 10 kHz repetition-rate pulses with 40 μs duration. When pumped by 20 kHz, 20 μs pulses, the PQS microchip laser generates stable dual pulses: the main pulse delivers 9.15 μJ energy, 2.3 ns width, and 4 kW peak power, while the satellite pulse features 2.5 ns width and 1.7 kW peak power. The 1064 nm laser pulses are further converted to stable 532 nm pulses via second-harmonic generation, and synchronization between the two wavelengths is realized, enabling potential applications in dual-wavelength high-resolution imaging.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101021"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147741350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Broadband configurable perfect absorber based on surface patterned graphene sheet in THz region 基于表面图案化石墨烯片的太赫兹区宽带可配置完美吸收体

IF 3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-03-23 DOI: 10.1016/j.rio.2026.101010

Soheil Hadipour, Pejman Rezaei, Shiva Khani

{"title":"Broadband configurable perfect absorber based on surface patterned graphene sheet in THz region","authors":"Soheil Hadipour, Pejman Rezaei, Shiva Khani","doi":"10.1016/j.rio.2026.101010","DOIUrl":"10.1016/j.rio.2026.101010","url":null,"abstract":"<div><div>In this study, a novel wideband metamaterial absorber is proposed, and its underlying operational mechanism is thoroughly analyzed. The suggested structure consists of a highly conductive gold substrate, Rogers RT5880LZ as the middle-insulated dielectric, and a circular enclosure with a square-shaped graphene layer, from bottom to top, respectively. The perks of our work are that this absorber is configurable and contains solely a simple-designed graphene layer, offering the benefits of simple implementation, affordability, and frequency tunability. Additionally, graphene is a tunable metamaterial; the results demonstrate that the recommended absorber can be used in wide-band applications without requiring geometrical reconfiguration, and due to external DC bias voltage, which adjusts graphene conductivity. First, the circular-shaped absorber is provided. Then by adding ribbon to our preliminary design, the absorption bandwidth grows to approximately 2 THz. Our design is symmetrical; this feature affects polarization sensitivity. The presented absorber demonstrates strong potential for filtering applications, communication and information security, imaging, and sensing material characterization applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101010"},"PeriodicalIF":3.0,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147652260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain-enabled tuning of whispering gallery modes in a polymer capillary microresonator 聚合物毛细管微谐振器中低语通道模式的应变激活调谐

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-09 DOI: 10.1016/j.rio.2026.101062

Rodion Dobretsov, V.R. Anand, Zhe Wang, Yiming Shen, Zhuochen Wang, Anuradha Rout, Rayhan Habib Jibon, Yuliya Semenova

{"title":"Strain-enabled tuning of whispering gallery modes in a polymer capillary microresonator","authors":"Rodion Dobretsov, V.R. Anand, Zhe Wang, Yiming Shen, Zhuochen Wang, Anuradha Rout, Rayhan Habib Jibon, Yuliya Semenova","doi":"10.1016/j.rio.2026.101062","DOIUrl":"10.1016/j.rio.2026.101062","url":null,"abstract":"<div><div>We demonstrate strain-enabled, reversible spectral tuning of whispering gallery modes (WGMs) in a polymethyl methacrylate (PMMA)-based capillary micro resonator. The WGMs were excited using evanescent wave coupling via an adiabatic fiber taper. A finite element method (FEM) model was developed to investigate strain-induced deformation in polymer capillaries, from which the corresponding wavelength tuning characteristics were numerically derived. Experimental results reveal that the polymer capillary resonator shows greater strain sensitivity than a solid polymer cylindrical resonator. A maximum strain sensitivity of 0.82 pm/με was experimentally demonstrated using a polymer capillary resonator (PCR) with an outer diameter of 100 μm and wall thickness of 25 μm. Discrepancies associated with varying strain ranges were also investigated. A linear WGM spectral tuning of up to 21.67 nm was achieved over a strain range of 30,000 με, with a discrepancy of 1.8 nm between forward and reverse cycles. No hysteresis was observed up to 4800 με, which is identified as the practical operating range. The device exhibits relatively high strain sensitivity, and the achieved tuning range exceeds those reported for both silica- and PMMA-based cylindrical resonators.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101062"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148429255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-modal metal–insulator–metal plasmonic biosensor with a star-shaped resonator for high-sensitivity PSA detection 多模态金属-绝缘体-金属等离子体生物传感器，星形谐振器，用于高灵敏度PSA检测

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-26 DOI: 10.1016/j.rio.2026.101067

Hamid Bahador, Hadi Keshizadeh, Zahra Abdoli, Azadeh Nilghaz

引用次数: 0

Thermally stable high-Q 2D photonic crystal sensor for label-free detection of leukemic blood cells 用于白血病血细胞无标记检测的热稳定高q二维光子晶体传感器

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-06-29 DOI: 10.1016/j.rio.2026.101066

Rusul Mohsin Moharib Alsarray, Yarob Abdullah, Fariborz Parandin

{"title":"Thermally stable high-Q 2D photonic crystal sensor for label-free detection of leukemic blood cells","authors":"Rusul Mohsin Moharib Alsarray, Yarob Abdullah, Fariborz Parandin","doi":"10.1016/j.rio.2026.101066","DOIUrl":"10.1016/j.rio.2026.101066","url":null,"abstract":"<div><div>Early and accurate detection of leukemia remains one of the most critical challenges in biomedical diagnostics. In this study, a highly sensitive two-dimensional photonic crystal (2D-PhC) optical sensor based on a silicon slab with air holes is proposed for distinguishing between normal and cancerous blood cells under various temperature conditions. The sensor structure comprises a central photonic crystal ring resonator surrounded by a hexagonal lattice of air holes, optimized for high optical performance. Simulation results demonstrate that the proposed sensor exhibits a high quality factor (Q-F = 5310), a narrow full width at half maximum (FWHM = 0.3 nm), a sensitivity of 250 nm/RIU, and a figure of merit (FOM = 760 RIU<sup>−1</sup>). The sensor effectively distinguishes between normal and leukemic cells based on their refractive index contrast (Δn = 0.014), with stable resonance behavior over a temperature range of 25 °C to 40 °C. Additionally, the fabrication tolerance analysis revealed that the sensor maintains consistent optical performance despite small geometric deviations in the cavity radius. Compared with previously reported photonic crystal and plasmonic sensors, the proposed design demonstrates superior optical performance, high thermal stability, and compact size (80 μm), making it a promising candidate for real-time, label-free, and non-invasive blood cancer detection applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101066"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analytical construction of exact traveling wave solutions to the nonlinear water wave equation 非线性水波方程行波精确解的解析构造

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-07-04 DOI: 10.1016/j.rio.2026.101076

Asghar Ali, Karim K. Ahmed, Homan Emadifar, Aly R. Seadawy

{"title":"Analytical construction of exact traveling wave solutions to the nonlinear water wave equation","authors":"Asghar Ali, Karim K. Ahmed, Homan Emadifar, Aly R. Seadawy","doi":"10.1016/j.rio.2026.101076","DOIUrl":"10.1016/j.rio.2026.101076","url":null,"abstract":"<div><div>The Benney–Luke model, which is a well-known nonlinear water wave equation, plays a significant role in describing bidirectional (two-way) propagation of long surface gravity waves in shallow water. In this study, exact traveling-wave solutions of the Benney–Luke model are derived using five distinct analytical techniques, namely the extended simple equation method, the modified extended auxiliary equation mapping method, <span><math><mrow><mo>(</mo><msup><mrow><mi>G</mi></mrow><mrow><mo>′</mo></mrow></msup><mo>/</mo><mi>G</mi><mo>)</mo></mrow></math></span>-expansion method, <span><math><mrow><mi>E</mi><mi>x</mi><mi>p</mi><mrow><mo>(</mo><mo>−</mo><mi>Ψ</mi><mrow><mo>(</mo><mi>ϕ</mi><mo>)</mo></mrow><mo>)</mo></mrow></mrow></math></span>-expansion method, and the modified F-expansion method, respectively. By employing these analytical approaches, a wide variety of exact traveling wave solutions is obtained, expressed in terms of hyperbolic, trigonometric, exponential, and rational functions. These solutions reveal diverse wave structures, including solitary waves, periodic waves, and rational wave profiles. To elucidate the physical characteristics and dynamical behavior of the model, selected exact solutions are illustrated through graphical representations by assigning suitable values to the involved parameters. The graphical analysis provides deeper insight into the influence of system parameters on wave propagation and shape. Furthermore, the analytical methods employed in this work are shown to be straightforward, efficient, and highly versatile, making them applicable to a wide range of nonlinear partial differential equations arising in water wave theory and other areas of mathematical physics.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101076"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatially-adaptive Gaussian perturbation for reversible privacy-preserving medical image sharing 空间自适应高斯摄动的可逆隐私保护医学图像共享

IF 3.3

Results in Optics Pub Date : 2026-03-01 Epub Date: 2026-07-02 DOI: 10.1016/j.rio.2026.101071

Narima Zermi, Med Sayah Moad, Amine Khaldi, Akram Boukhamla, Med Redouane Kafi, Aditya Kumar Sahu

{"title":"Spatially-adaptive Gaussian perturbation for reversible privacy-preserving medical image sharing","authors":"Narima Zermi, Med Sayah Moad, Amine Khaldi, Akram Boukhamla, Med Redouane Kafi, Aditya Kumar Sahu","doi":"10.1016/j.rio.2026.101071","DOIUrl":"10.1016/j.rio.2026.101071","url":null,"abstract":"<div><div>The rapid integration of digital technologies into modern healthcare has led to an unprecedented exchange of medical imaging data across clinical and remote platforms, raising critical concerns about patient privacy and data exposure. While conventional encryption techniques ensure secure storage and transmission, protected images become fully vulnerable once decrypted. Moreover, many existing protection schemes fail to guarantee faithful reversibility of the original diagnostic content. We propose a key-controlled, entropy-guided Gaussian perturbation framework for reversible privacy preservation. The method performs local entropy analysis to identify sensitive regions, then injects spatially adaptive Gaussian noise using cryptographically secure pseudo-random sequences from a 256-bit key. High-entropy pathological structures receive amplified perturbation while anatomical contexts are preserved. Exact reversibility is achieved through deterministic inversion. Experiments on ChestX-ray14, BraTS 2021, and OCTID demonstrate: imperceptibility (PSNR 41.8 dB, SSIM 0.971), protection against ResNet-50/U-Net (ASR 8.2%, SRR 28.5%), near-exact reconstruction (MAE 0.14), and real-time processing (57 ms/image). Cross-dataset generalization and JPEG compression robustness confirm practical viability. This training-free method enables secure telemedicine and research data sharing without compromising diagnostic integrity.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"24 ","pages":"Article 101071"},"PeriodicalIF":3.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0