Article
Materials Science, Multidisciplinary
Sezen Tekin, Ahmet Karatay, Yusuf Osman Donar, Selva Bilge, Elif Akhuseyin Yildiz, Ali Sinag, Ayhan Elmali
Summary: This study investigated the effects of nanoparticles aggregates and concentration on the linear and nonlinear optical absorption properties of ZnS and ZnS/carbon-based materials in PMMA matrix. The experimentation revealed that the band gap decreased with increasing weight concentration of nanoparticles in PMMA, and the highest effective nonlinear absorption coefficient was obtained for the thin films with 30 wt% nanoparticle concentration. TEM results showed that the addition of carbon caused the aggregation of nanoparticles.
Article
Polymer Science
Luis R. Torres-Ferrer, Jose M. Lopez-Romero, Juan Mendez-Nonell, Maria J. Rivas-Arreola, Marisa Moreno-Rios, Erika O. Avila-Davila, Evgeny Prokhorov, Yuriy Kovalenko, Diana G. Zarate-Trivino, Javier R. Revilla-Vazquez, Marco A. Meraz-Rios, Gabriel Luna-Barcenas
Summary: In this study, chitosan-gold nanocomposite thin films were synthesized by chemically reducing HAuCl4 in chitosan solutions, and the effects of HAuCl4/sodium citrate molar ratio on the structure, electrical, and relaxation properties were investigated. It was found that the HAuCl4/sodium citrate ratio influenced the size of gold particles, conductivity, Vogel temperature, and water content. Two relaxation processes were observed in the nanocomposites, which could be used for the design of functional materials.
Article
Materials Science, Ceramics
Abhiram Jagannathan, Jagannath Gangareddy, R. Rajaramakrishna, K. M. Rajashekara, S. Venugopal Rao, J. Kaewkhao, S. Kothan, A. El-Denglawey
Summary: This study focuses on the optical properties of Au-Ag bimetallic nanoparticles doped in dichroic glasses, highlighting the importance of precursor materials (AgNO3, AgCl, and AgI). The incorporation of silver and gold in the glass matrix reduces nanoparticle size and enhances the nonlinear refractive index, with potential overlap of surface plasmon resonance of Ag and Au. Differences in bandgap energy due to different dopants impact the nonlinear optical properties of the nanoparticles.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Physical
Shuaipeng Chen, Shuaibin Li, Yun Wang, Quan Ren, Yuhua Feng, Hongyu Chen
Summary: We have demonstrated a method to continuously tune the wetting growth of Au on Se seed nanoparticles by manipulating the growth kinetics. This approach allows us to obtain a series of Se-Au hybrids and anisotropic Au semi-shell structures with different sizes, and enables continuous tuning of their absorptions and LSPRs within the Visible-NIR spectral range.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Optics
N. N. H. E. N. Mahmud, N. A. Awang, N. U. H. H. Zulkefli, F. N. M. Hanafiah
Summary: This study presents a method for optically trapping silica gel microparticles using a stable Q-switched fiber laser pulse. By fabricating gold nanoparticles as saturable absorbers, stable Q-switched fiber laser pulses with a frequency of 25.81 kHz were achieved. The microparticles exhibited different attractive trapping forces based on the viscous drag exerted by the laser field. Experimental results confirmed the validity of the numerical model and demonstrated the potential application of the proposed system for absorption microparticle trapping at 1540 nm wavelength.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Applied
O. V. Ovchinnikov, M. S. Smirnov, T. A. Chevychelova, A. I. Zvyagin, A. S. Selyukov
Summary: The analysis focused on the nonlinear optical properties of thiazine dye molecules of Methylene Blue (MB+), which were located in the near-field zone of spherical gold nanoparticles coated with a silicon dioxide shell (Au/SiO2 NPs). The study found an increase in reverse saturated absorption of MB+ dye in the presence of gold nanoparticles under specific laser pulses, and discussed the plasmon nanoparticles' effect on optical transitions. It was concluded that the increase in effective cross section for triplet-triplet absorption of MB+ molecules in the presence of Au/SiO2 NPs contributed significantly to the observed effect.
Article
Physics, Applied
Kai Yang, Shenghui Kang, Xiaoyu Wu, Bohua Liu, Chongling Sun, Yanyan Wang
Summary: A high NIR sensitivity and spectral selectivity photothermal detector was developed by modifying a photothermal layer of reduced graphene oxide-Au nanorods hybrid. The detector converts light energy into heat and measures resistance changes. The hybrid material exhibits remarkable photothermal conversion efficiency and dependence on spectral response, resulting in high sensitivity to illumination in the wavelength range from 700 to 1000 nm.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Pauline Blyweert, Alexander Zharov, Darya Meisak, Artyom Plyushch, Jan Macutkevic, Juras Banys, Vanessa Fierro, Alain Celzard
Summary: 3D-printed carbon structures filled with BaTiO3 nanoparticles were studied for their properties in low and microwave frequency ranges. These structures exhibited high electrical conductivity in the low-frequency range and excellent dielectric properties in the microwave range. The electrical transport was thermally activated and attributed to electron transport through various defects. The investigated structures showed attractive electromagnetic properties in the microwave range, with high absorption rates for BaTiO3-filled structures.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Koushik Mondal, Subrata Biswas, Tara Singha, Udit Chatterjee, Prasanta K. Datta, Pathik Kumbhakar
Summary: The synthesis of Au nanodusters with Au1NC and Au2NC in colloidal solution demonstrates strong and stable blue luminescence with high quantum yield. The nonlinear optical two-photon absorption properties of these materials are studied for the first time, showing reverse saturable absorption behavior and high third-order nonlinear susceptibility under laser excitation. Additionally, the synthesized AuNCs exhibit excellent optical power limiting phenomenon, making them promising for future photonics applications.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Optics
Sara D. G. Mariano, Naythalla A. M. Saraiva, Jean C. S. Costa, Claudevan A. Sousa, Nefe J. B. Silva, Hans A. Garcia, Francisco Eroni P. Santos
Summary: This study investigates the nonlinear optical properties of metallic nanoparticles, focusing on monometallic silver and bimetallic silver-gold nanoparticles, in the infrared region with ultra-short pulses. The nanoparticles exhibited localized surface plasmon resonance characteristics and good size distribution. The results suggest great potential for application in photonics, especially in tuning nonlinear optical properties.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Luciana Paula Martinez, Julian Gargiulo, Mariano Barella, Ianina Lucila Violi, Fernando Daniel Stefani
Summary: This study investigates the control of plasmon-driven growth of Au NPs by live monitoring their photoluminescence emission. The results show that the emission maximum of single NPs can be finely tuned between 550 and 580 nm with a precision of 2-3 nm, and this tuning is reflected in their scattering maximum as well. Comparatively, the closed-loop control delivers superior reproducibility and precision in the final properties of the NPs compared to controlling the growth by irradiation time and/or reaction conditions.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Polymer Science
N. Ceren Slier, Ilayda Acaroglu Degitz, Pelin Sungur, Ali Bayir, Tarik Eren
Summary: The introduction of phosphonium groups onto the surface of gold nanoparticles can enhance stability, and phosphonium-based polymers can act as both reducing and stabilizing agents for gold nanoparticles.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Dao Son Lam, Nguyen Ngoc Tung, Dang Duc Dung, Bui Xuan Khuyen, Vu Dinh Lam, Tran Dang Thanh
Summary: Multiferroic nanocomposites of NFO-BTO were prepared and the characteristic parameters were found to increase with the NFO concentration. Moreover, the NFO-BTO nanocomposites showed potential in absorbing and shielding electromagnetic waves.
MATERIALS RESEARCH EXPRESS
(2022)
Article
Chemistry, Physical
Muammer Y. Yaman, Kathryn N. Guye, Maxim Ziatdinov, Hao Shen, David Baker, Sergei Kalinin, David S. Ginger
Summary: The study found that gold nanorods tend to align parallel to protein nanofibers, with this preference decreasing as salt concentration increases. Increase in specific gold nanorod attachment density with solution ionic strength is primarily dominated by non-specific binding to the substrate background.
Article
Environmental Sciences
Yasin Orooji, Bahareh Tanhaei, Ali Ayati, Soheil Hamidi Tabrizi, Marzieh Alizadeh, Fatemeh F. Bamoharram, Fatemeh Karimi, Sadegh Salmanpour, Jalal Rouhi, Safoora Afshar, Mika Sillanpaa, Rozhin Darabi, Hassan Karimi-Maleh
Summary: In this study, gold nanoparticles were well-decorated on the surface of TiO2 using HPW as reducing intermediate linkers, thereby enhancing the photocatalytic performance compared to anatase TiO2 and HPW/TiO2. The photocatalytic rate of the prepared nanocomposites increased by 6.5-fold and 4.6-fold, and the reusability study confirmed their high photocatalytic activity after three cycles.
Article
Optics
Zhi-Huan Pang, Meng Liu, Ai-Ping Luo, Yi Xu, Wen-Cheng Xu, Songnian Fu, Zhi-Chao Luo
Summary: We propose a novel mode-dependent gain equalizer using a few-mode chirped fiber Bragg grating (FM-CFBG) to effectively mitigate the mode-dependent gain in an all-fiber 2-mode EDFA. The equalizer based on FM-CFBG offers compact size, low insertion loss, and wavelength scalability, making it meaningful for long-haul MDM transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yiwei Qiu, Chenliang Ding, Gangyao Zhan, Mengdi Luo, Jisen Wen, Mengbo Tang, Chun Cao, Wenjie Liu, Liang Xu, Bihu Lv, Dazhao Zhu, Cuifang Kuang, Xu Liu
Summary: This article proposes a novel method to simultaneously reduce the axial and lateral feature sizes of PPI-DLW. By employing a pseudo 3D hollow focus, a suspended nanowire with an isotropic 30-nm feature size was realized, thereby improving the capabilities of PPI-DLW for fabricating arbitrary 3D structures.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Manzhuo Wang, Jianbo Yue, Zhentao Yao, Tingyu Liu, Xiaoqiang Sun, Yuanda Wu, Daming Zhang
Summary: A silica waveguide 1×8 thermo-optic switch consisting of cascaded three-stage Mach-Zehnder interferometers (MZIs) is successfully demonstrated. The switch utilizes a multimode interference (MMI) coupler in the MMI-MZI 1×2 switch unit for its wavelength insensitivity and favorable fabrication tolerance. The switch design and optimization is based on the beam propagation method (BPM) and implemented using standard CMOS technologies. Experimental results show that the switch meets the requirements for insertion loss and crosstalk at 1550 nm wavelength, and also performs well in a wide wavelength range.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
H. M. de la Cruz, E. D. Hernandez-Campos, E. Ortiz-Ricardo, A. Martinez-Borquez, I. Rosas-Roman, V. Contreras, G. Ramos-Ortiz, B. Mendoza-Santoyo, Cecilia I. Zurita-Lopez, R. Castro-Beltran
Summary: Acoustic levitation is an important contactless manipulation technique in various fields. This study presents an affordable phased-array levitator that can stably trap micrometer dye-doped droplets in the air, enabling the creation of microlasers. The levitated microlasers exhibit comparable optical lasing features to On-a-Chip devices, with a maximum Q-factor of approximately 105 and a minimum lasing threshold of approximately 150 nJ cm-2.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yuqi Wang, Zilong Zhang, Suyi Zhao, Wei He, Xiaotian Li, Xin Wang, Yuchen Jie, Changming Zhao
Summary: This paper investigates the impact of localized defects in SLM devices on structured light generation and demonstrates the reconstructed light field results under different defect states using CGH loaded onto the DMD. The results show that central defects have minimal influence on the reconstructed light field, while edge defects have a significant impact. This study expands the application scenarios for the generation of structured light beams with SLM.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ashraf A. A. Beshr, Hossam El-Din Fawzy, Ehab A. A. Eldin, Jong Wan Hu, Fathi A. Abdelmgeed
Summary: This paper introduces the application of digital measuring techniques, specifically Digital Close Range Photogrammetry (DCRP), in the detection of deformation in post-tensioned structural elements (PTSEs). The use of digital equipment and a terrestrial laser scanner (TLS) allows for highly accurate monitoring of PTSE camber, with deviations not exceeding 0.01 mm.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Shihao Gou, Danping Huang, Shipeng Liao, Fan Luo, Yang Yuan, Liang Liu, Xiaomei Wen
Summary: This paper proposes an online intelligent detection method for cable pitch defects in the field of optical cable manufacturing. The method utilizes a multi-sensor fusion image acquisition platform and deep learning technology to achieve accurate detection of pitch defects in optical cables.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Tun-Yao Hung, David W. U. Chan, Ching-Wei Peng, Chi-Wai Chow, Hon Ki Tsang
Summary: We present the first experimental demonstration of a high-capacity short-reach optical communication link which utilizes LSTM and DNN to achieve 300 Gbit/s 8-level pulse amplitude modulation (PAM8) generated by a single microring modulator. The experimental results show that 300 Gbit/s and 270 Gbit/s PAM8 modulation can be achieved at back-to-back and after 1 km transmission respectively.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Long Zhang, Li Pei, Jianshuai Wang, Jingjing Zheng, Kaihua Hu, Zhiqi Li, Tigang Ning, Jing Li, Li Zhong, Ruisi He
Summary: The amplification of long-haul mode division multiplexing (MDM) transmission systems is currently achieved through three steps, which can result in complexity and degraded transmission performance. To address this issue, this paper proposes an in-line few-mode erbium-doped fiber amplifier (FM-EDFA) based on cladding pumping, which enables simultaneous amplification and transmission in MDM systems. Experimental results demonstrate that the in-line FM-EDFA has excellent performance and shows great potential for practical long-haul transmission systems.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Chong Wang, Miaomiao Li, Jiahao Yang, Bingli Zhu, Jianghao Han, Wenbin Dang
Summary: This paper introduces the design of drive circuits using step recovery diodes and RF bipolar transistors to produce narrow pulse lasers, achieving the reduction of system size, power consumption and cost.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Ziqian Zhang, Liangyu Zhao, Chaorun Si, Yang Tian, Shilin Xu
Summary: A Hastelloy C276 coating was prepared on a martensitic stainless-steel substrate using laser melting deposition, resulting in a coating with high resistance to cavitation erosion. The coating exhibited a thick, progressively changing grain morphology from bottom to top, and the grains grew in a specific angle to the substrate plane. A compositional mixing zone was formed at the interface, forming a stable metallurgical bond. The coating showed a significantly improved hardness and enhanced resistance to cavitation erosion compared to the substrate.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Cui-Hong Li, Chao-Xiong He, Yuan-Yuan Ma, Jin-Chuan Wang, Ying Dong, Shao-Chong Zhu, Xiao-Wen Gao, Hui-Zhu Hu
Summary: In this paper, a non-contact optical measuring method for characterizing nanoparticles using optical tweezers is presented. The method relies on the optical polarization and scattering of nanoparticles, providing insights into both shape and size parameters. Experimental results show that the method can accurately measure the shape and size of nanoparticles, making it an effective tool for identifying and studying individual nanoparticles.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Magdalena Zieba, Cuma Tyszkiewicz, Katarzyna Wojtasik, Krystian Pavlov, Pawel Chaber, Ewa Gondek, Jacek Niziol, Roman Rogozinski, Pawel Kielan, Pawel Karasinski
Summary: This work presents a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crack-free SiOx:TiOy composite layers with refractive indices of approximately 1.65 were fabricated using a sol-gel method and dip-coating technique. The fabricated layers exhibited good waveguide properties and optical homogeneity.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Yali He, Jiao Tang, Zhongyang Li, Yaowu Hu
Summary: In this paper, a lithography-free broadband absorbing metasurface consisting of Ag nanoparticles with ultrafine nanogaps is demonstrated. The experimental results and numerical simulations show that the horizontally compressed Ag nanoparticles possess smaller nanogaps for high sensitivity, uniformity, and stability. The novel substrate also exhibits insensitivity to the incident or observation angle in an ambient environment and has promising practical applications.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Optics
Linqing Li, Chengwei Yang, Zhuo Wang, Kun Xiao, Rui Min
Summary: In this study, a stretchable polymer optical fiber with a sandwich structure was proposed for sleep monitoring. The fiber improved the pressure sensitivity of the mattress and enabled the measurement of respiratory rate, heart rate, and body motion information.
OPTICS AND LASER TECHNOLOGY
(2024)