Article
Optics
Fang Wang, Yuhan Qu, Dongfang Lan, Xuenan Zhang, Tonglei Cheng
Summary: In this work, we demonstrated the mode-locked pulses at 1560 nm induced by the deposition of M-phase vanadium dioxide nanoparticles (VO2(M) NPs) onto the D-shaped fiber surface. Our work verified the great potential of VO2(M) NPs for nonlinear optics and ultrafast photonics applications.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Crystallography
Hazlihan Haris, Malathy Batumalay, Tan Sin Jin, Ahmad Razif Muhammad, Arni Munira Markom, Caroline Livan Anyi, Muhamad Hakim Izani, Mohd. Zulhakimi Ab. Razak, Megat Muhammad Ikhsan Megat Hasnan, Ismail Saad
Summary: We developed a simple mode-locked Erbium-doped fiber laser (EDFL) with a self-synthesized saturable absorber (SA) made of graphene oxide (GO) and polyethylene oxide (PEO) solutions to form a GO-PEO thin film. The EDFL operated at a 22 MHz repetition rate and produced stable soliton pulses. Our study demonstrates the effectiveness and cost-effectiveness of the GO-PEO SA as a material for saturable absorbers in EDFLs.
Review
Optics
Kuen Yao Lau, Xiaofeng Liu, Jianrong Qiu
Summary: MXenes are a new class of two-dimensional materials with huge potential in photonics, electronics, and energy fields. Recent studies have shown that MXenes can replace traditional saturable absorbers, exhibiting high saturable absorption, flexible modulation ability, and high electron density. This review summarizes the synthesis and characterization of MXene, focusing on its nonlinear saturable absorption and its application as a saturable absorber in mode-locked fiber lasers.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Won Bae Cho, Dong Ho Shin
Summary: In this work, ultra-short pulses are generated from a passively mode-locked Cr:ZnS laser using a high nonlinearity ZnSe substrate and a graphene saturable absorber. The enhanced self-phase modulation by the ZnSe substrate enables the laser to produce slightly chirped pulses. The pulse width is further compressed using an extracavity dispersion compensator.
Review
Materials Science, Multidisciplinary
Kuen Yao Lau, Xiaofeng Liu, Jianrong Qiu
Summary: Saturable absorbers (SAs) such as carbon nanotubes (CNT) and graphene have been widely used in fiber and solid-state lasers for pulse generation due to their unique saturable absorption properties. This review comprehensively compares the differences between CNT and graphene in terms of optical nonlinearity, relaxation and recovery time, saturation intensity or fluence, modulation depth, non-saturable loss, and damage threshold dynamics. Recommendations for selecting CNT and graphene SAs in mode-locked fiber lasers are also provided.
ADVANCED PHOTONICS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Daniel Felipe Londono-Giraldo, Eunezio Antonio Thoroh De Souza, Hugo Luis Fragnito
Summary: The interaction between graphene and light in a waveguide can be optimized through waveguide design to potentially create polarizers with large polarization extinction ratios and saturable absorbers with low saturation powers. The study introduces parameters to quantify the strength of saturable absorption and analyzes how the graphene-light interaction varies with different geometric parameters, chemical potential, number of graphene layers, and input power. Results suggest potential applications in waveguide structures using other 2D materials besides graphene.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Tonglei Cheng, Dongfang Lan, Yuhan Qu, Fan Zhang, Wei Liu, Xuenan Zhang, Fang Wang
Summary: This paper presents a passively mode-locked laser operating at 2 um region based on a saturable absorber of ferroferric-oxide nanoparticles (FONPs) deposited on a D-shaped fiber (DF). It is the first demonstration of FONP-DF SA in fiber lasers at 2 um region and it paves the way for future use of FONP-DF for magnetic field sensing.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Shaodong Hou, Chengjin Lu, Zhijian Ma, Liu Kang, Jianqun Cheng, Min Zhang, Peiguang Yan
Summary: This paper presents two low chemical activity saturable absorbers, tellurium dioxide and antimony trioxide thin film, for stable femtosecond pulse generation. The results show that these oxides exhibit good nonlinear absorption characteristics, exceptional mode-locking performance, and excellent thermal stability and long-term stability, making them more suitable for robust mode locking in harsh environments and enabling new applications for optical modulators.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Li Dong, Hongwei Chu, Ying Li, Shengzhi Zhao, Dechun Li
Summary: This study investigates the nonlinear optical properties of cupric oxide (CuO) nanosheets using the Z-scan technique and successfully demonstrates the realization of a stable all-solid-state mode-locked laser using CuO nanosheets as saturable absorber for the first time. The results reveal the outstanding nonlinear optical absorption properties of CuO nanosheets, which have significant potential in the fields of ultrafast photonics and nonlinear optics.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Multidisciplinary
Fang Wang, Dongfang Lan, Xuenan Zhang, Tonglei Cheng
Summary: Titanium nitride (TiN) nanoparticles deposited onto a D-shaped fiber (DF) were utilized as optical modulators in ultrafast fiber lasers operating at 1.5 and 2 mu m wavelengths, resulting in femtosecond pulses with high performance. The TiN-DF saturable absorber (SA) integrated into erbium-doped and thulium-doped fiber laser cavities demonstrated the potential for novel applications as a temperature sensitive device, with a proposed temperature sensor sensitivity of 88 pm degrees C-1. Our study confirms that TiN-DF modulators are excellent nonlinear optical devices for ultrafast photonic applications.
Article
Optics
Rizwan Ajmal, Shakeela Bibi, Rizwan Ahmed, M. Sohail, H. Asghar, Z. A. Umar, N. Shahzad, M. A. Baig
Summary: This study demonstrates a passively Q-switched Erbium doped fiber laser based on a ZnO saturable absorber prepared using a pulsed laser deposition technique. The in-situ monitoring and control of the thickness of the saturable absorber during growth was achieved. Varying the thickness of the saturable absorber was found to improve the performance and efficiency of the fiber laser. The optimized results based on the thickness of the saturable absorber are also presented.
LASER PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Harith Ahmad, Kirubhashni Loganathan, Norazriena Yusoff
Summary: This study used a Graphene/Zinc Oxide (G/ZnO) nanocomposite to generate mode-locked pulses in Thulium/Holmium-doped fiber (THDF). The sol-gel method was used to synthesize ZnO particles decorated with graphene sheets. The G/ZnO nanocomposite solution was deposited onto an arc-shaped fiber acting as the saturable absorber (SA) device. By incorporating the fabricated SA into the THDF laser cavity, stable mode-locked pulses were produced at a threshold pump power of 274.3 mW with a center wavelength of 1895.11 nm, fundamental frequency of 11.82 MHz, and a pulse duration of 1.7 ps.
Article
Chemistry, Physical
Xiameng Li, Jian Liu, Feifei Qin, Da Chen, Xu Wang
Summary: Van der Waals (vdW) heterostructures are a promising platform for optimizing and controlling physical properties of materials and devices in ultrafast photonic applications. In this study, a hybrid vdW saturable absorber (SA) based on ZnO sphere heterostructures has been fabricated. Compared to the ZnO sphere SA, the vdW SA exhibits stronger emission intensity in the ultraviolet-visible range and higher optical absorption in the near-infrared range. By using balanced twin-detector technology, a modulation depth of 6.6% has been obtained from the vdW SA, which is 2.8 times greater than that of the solo ZnO SA. Based on the hybrid vdW SA, stable Q-switched laser and mode-locked laser operation have been achieved.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
Afiq Arif Aminuddin Jafry, Ahmad Razif Muhammad, Nabilah Kasim, Ahmad Haziq Aiman Rosol, Muhammad Farid Mohd Rusdi, Nik Nurul Nazipah Ab Alim, Sulaiman Wadi Harun, Preecha Yupapin
Summary: MXene, a two-dimensional ternary metal carbide or/and nitride, possesses numerous advantages in terms of electronic and optical properties, attracting significant research efforts in ultrafast photonics applications due to its fast optical-switching capability and strong saturable absorption. By developing MXene-based SA devices, high-energy mode-locking applications were successfully demonstrated in an erbium-doped fiber laser cavity, indicating promising potential for future high-energy mode-locking applications.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Optics
Fang Wang, Dongfang Lan, Jianxin Zhao, Yuhan Qu, Xue Zhou, Xuenan Zhang, Tonglei Cheng
Summary: In this study, a novel saturable absorber (SA) made of Tungsten carbide nanoparticles (WCNs) deposited onto a D-shaped fiber (DF) was demonstrated, showing potential for high-performance ultrafast optical applications.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
David Steinberg, Juan Diego Zapata, Lucia A. M. Saito, Eunezio A. Thoroh de Souza
Summary: The research identified four different laser operating regimes in the EDFL, with non-soliton and soliton formation from short to ultralong cavity lengths, all related to graphene/NPR nonlinearities, dispersion, and soliton propagation influences through analyzing spectral evolution, temporal and soliton behaviors of the pulse.
IEEE PHOTONICS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Danilo Argentoni Nagaoka, Daniel Grasseschi, Sergio Humberto Domingues
Summary: The study improved the synthesis of graphene derivatives, obtaining a high structural quality rGO HQ material by controlling the oxidation process and reduction method, which exhibits high conductivity and transparency, and can be applied in large-scale production efficiently.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Chemistry, Applied
Anna Paula Godoy, Leice G. Amurim, Alexandre Mendes, Emerson S. Goncalves, Anderson Ferreira, Carolina Santos de Andrade, Rumiana Kotsilkova, Evgeni Ivanov, Marino Lavorgna, Lucia A. M. Saito, Helio Ribeiro, Ricardo J. E. Andrade
Summary: A low-cost conductive coating was developed for Electromagnetic Interference shielding, using reduced graphene oxide and SEBS block copolymer. By adding the block copolymer, the coating's adhesion was improved, leading to the best shielding effectiveness.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
David Steinberg, Juan D. Zapata, Regiane Nascimento, Henrique G. Rosa, Lucia A. M. Saito, Eunezio A. Thoroh de Souza
Summary: In this work, a femtosecond mode-locking Erbium-doped fiber laser using mechanically exfoliated rhenium disulfide as a saturable absorber was reported. The laser achieved the best mode-locking performance ever reported with all-fiber based ReS2 saturable absorber.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Chemistry, Multidisciplinary
Thiago R. S. Malagrino, Anna P. Godoy, Juliano M. Barbosa, Abner G. T. Lima, Nei C. O. Sousa, Jairo J. Pedrotti, Pamela S. Garcia, Roberto M. Paniago, Lidia M. Andrade, Sergio H. Domingues, Wellington M. Silva, Helio Ribeiro, Jaime Taha-Tijerina
Summary: In this study, flower-like molybdenum disulfide (MoS2) microspheres were successfully synthesized with polyethylene glycol (PEG) to form MoS2-PEG. Gold nanoparticles (AuNPs) were incorporated to form hierarchical MoS2-PEG/Au microstructures, showing good cellular viability on both tumoral and non-tumoral cells. The hybrid nanomaterials demonstrated potential for cancer diagnosis and therapy with their multifunctional characteristics.
Article
Materials Science, Multidisciplinary
Caroline Brambilla de Aquino, Jessica Eliza Silva Fonsaca, Sergio Humberto Domingues
Summary: This work demonstrates the preparation of an energy storage device by combining mixed transition metal oxides (MTMO) and conductive polymers. The optimal ratio of RuO2-WO3 was found to be 1:5, with W insertion on Ru structure correlated to the best specific capacitance. A nanocomposite of RuO2-WO3 1:5/PAni was synthesized, exhibiting remarkable capacitive properties with capacitance values reaching up to 937 mF cm(-2). A symmetrical energy storage device was built with capacitance values comparable to commercial devices. These findings highlight the potential of nanocomposites as cost-effective alternatives for energy storage devices.
JOURNAL OF MATERIALS SCIENCE
(2023)
Review
Optics
E. A. Thoroh de Souza, David Steinberg, Lucia A. M. Saito, Henrique G. Rosa, Juan D. Zapata, Christiano J. S. de Matos, Hugo L. Fragnito, Carlos H. Brito Cruz
Summary: This paper reviews the scientific contributions of the last 30 years on erbium-doped fiber laser ultrashort pulse generation in South America. The focus is on contributions authored in South American institutions. It reveals a wide variety of laser cavities, ranging in length from a few centimeters to tens of kilometers, and optical pulses, from tens of femtoseconds to nanoseconds, with fully controlled average and peak powers. Furthermore, different approaches for ultrashort pulse generation using active (synchronous and asynchronous) and/or passive modelocking techniques are discussed, as well as the employment of nonlinear optical phenomena (Kerr effect) and several two-dimensional nanomaterials as saturable absorbers, such as carbon nanotubes, graphene, graphite, graphene oxide, reduced-graphene oxide, semiconductor transition metal dichalcogenides, and black phosphorus. Finally, the paper revisits and discusses several advances, important milestones, and records on ultrashort pulse generation in erbium-doped fiber lasers, with many essential outcomes attesting to the high quality of research carried out in South America in the field of ultrafast fiber lasers.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2023)
Article
Spectroscopy
Joao Manoel de Lima Junior, Rodrigo Papai, Monica Benicia Mamian-Lopez, Sergio Humberto Domingues, Lidiane Cristina Nunes, Francisco Jose Krug, Ivanise Gaubeur
Summary: Dispersive micro solid-phase extraction (D & mu;SPE) combined with laser-induced breakdown spectroscopy (LIBS) was used to develop an analytical method for the determination of metal ions in liquid samples. Graphene oxide was immobilized on agarose films and cellulose ester membranes using D & mu;SPE. Calibration curves with linear ranges were obtained, and the method was successfully applied to certified reference materials of drinking water, groundwater, and wastewater.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Antonio Gomes dos Santos Neto, Ana Caroline Ferreira Santos, Jose Antonio de Oliveira Junior, Cristiane Luisa Jost, Camila Silva de Sousa, Marilia Oliveira Fonseca Goulart, Antonio Euzebio Goulart Santana, Sergio Yesid Gomez Gonzalez, Ederson Esteves da Silva, Jessica Eliza Silva Fonsaca, Sergio Humberto Domingues, Daiane Fossatti Dall'Oglio, Hector Aguilar Vitorino, Auro Atsushi Tanaka, Franciele de Matos Morawski, Marco Aurelio Suller Garcia
Summary: We propose a tungsten oxide and reduced graphene oxide nanocomposite (WO3-G/ MWCNT) that was mixed with MWCNTs and exhibited excellent electrochemical performance when deposited on a glassy carbon electrode. The nanocomposite showed a synergic effect towards rutin oxidation and high selectivity in the presence of interferents, demonstrating its potential as an ultra-sensitive voltammetric sensor.
MICROCHEMICAL JOURNAL
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ary V. R. Portes, Hilton H. Shimabuko, Lucia A. M. Saito, Jhonattan C. Ramirez
Summary: This work introduces the design of a strongly confined optical mode embedded double-layer graphene capacitor based on Fermi level control. Simulation results showed a high extinction ratio of 180 dB/mm using a specific combination of materials. Analysis of current and capacitance provided insights into the electrical response and intrinsic nonlinearities of the modulator.
2021 SBFOTON INTERNATIONAL OPTICS AND PHOTONICS CONFERENCE (SBFOTON IOPC)
(2021)
Article
Chemistry, Physical
Yunier Garcia-Basabe, David Steinberg, Lara M. Daminelli, Cesar D. Mendoza, E. A. Thoroh de Souza, Flavio C. Vicentin, Dunieskys G. Larrude
Summary: This study investigated charge-transfer dynamics at the interface between 2D layered franckeite and two thiophene-based conjugated polymers. By using NEXAFS and RAS synchrotron-based spectroscopies, evidence of ultrafast interfacial electron delocalization pathways from specific electronic states was found. The results have implications in understanding how ultrafast electron delocalization occurs in organic/inorganic van der Waals heterojunctions, which is crucial for designing new devices involving these systems.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Vitor H. N. Martins, Nicolas M. S. Siqueira, Jessica E. S. Fonsaca, Sergio H. Domingues, Victor H. R. Souza
Summary: This work presents the preparation of ternary composites of reduced graphene oxide/polyaniline/iron oxide as free-standing and flexible thin films using a simple doctor blade technique. By adding polyaniline, the composites were able to produce free-standing films without the need for binders or conductive additives, while also improving energy storage performance. The ternary free-standing film exhibited high specific capacitance and long-term stability, showing potential for large-scale application in energy storage systems.
ACS APPLIED NANO MATERIALS
(2021)
