Article
Materials Science, Ceramics
P. Soumya Menon, Jibi Kunjumon, Manisha Bansal, Sutheertha S. Nair, C. Beryl, G. Vinitha, Tuhin Maity, Priya Mary Abraham, D. Sajan, Reji Philip
Summary: Pristine NiO and 2% Cr doped NiO nanostructures were synthesized successfully using the modified auto-combustion method. They exhibit nonlinear optical behavior suitable for fabricating efficient optical limiting devices. The third order nonlinear absorption coefficients confirmed their suitability for protecting human eyes and optical sensors from hazardous laser radiation under pulsed and continuous wave excitations.
CERAMICS INTERNATIONAL
(2023)
Article
Spectroscopy
Maria Merin Antony, C. S. Suchand Sandeep, Vadakke Matham Murukeshan
Summary: Broadband hyperspectral z-scan using a supercontinuum light source is a convenient technique to obtain spectrally resolved nonlinear optical properties of materials. A 3D data model is proposed for representing the data obtained from broadband z-scan measurements, aiding in the quick characterization of spectrally resolved nonlinear optical properties of materials.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Electrical & Electronic
R. A. Sharath, K. Mani Rahulan, N. Angeline Little Flower, R. Annie Sujatha, G. Vinitha, L. Reshma Rajeev, Tandrima Saha, D. Prakashbabu
Summary: The third order nonlinear optical properties of Er3+-doped BaMoO4 nanostructures were investigated, showing that the addition of Er can significantly enhance the nonlinear absorption coefficient and refractive index of the nanostructures, making them potentially useful for nonlinear optical device applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
R. A. Sharath, K. Mani Rahulan, N. Angeline Little Flower, R. Annie Sujatha, G. Vinitha, L. Reshma Rajeev, Tandrima Saha, D. Prakashbabu
Summary: Through doping Er ions, the third order nonlinear optical properties of BaMoO4 nanostructures can be significantly enhanced, increasing light absorption in the visible region and showing potential for applications in nonlinear optical devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Luying Yin, Jie Jiang, Yanyan Huo, Shuyun Wang, Tingyin Ning
Summary: The third-order nonlinear optical properties of niobium-rich lithium niobite (LN) thin films prepared by magnetron sputtering and annealed in high-purity oxygen exhibit reverse saturation absorption and self-focusing behaviors. The nonlinear refractive index gamma and absorption coefficient 13 are significantly influenced by the atom composition and incident wavelength. These findings are important for LN-based integrated on-chip photonic devices.
Article
Materials Science, Multidisciplinary
Kiran U. John, Siby Mathew
Summary: Ternary alloyed CdZnTe quantum dots were prepared in aqueous medium and their structural and morphological characteristics were investigated. The results showed that the alloyed CdZnTe had tunable nonlinear characteristics, making it a potential candidate for nonlinear optical devices and applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Physical
D. Karthikeyan, K. Vijayakumar, P. Suhasini, A. Dhanusha, T. C. Sabari Girisun
Summary: In this study, we investigated the nonlinear optical limiting characteristics of pure and Cr3+ doped La2(W-O4)3 nanoparticles. The results showed that the Cr3+ doped samples exhibited higher nonlinear absorption coefficient and nonlinear refractive index, making them suitable for optical limiting applications.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Optics
M. Mousavi, M. Nadafan, Sh. Tabatabai Yazdi
Summary: The study investigates the impact of Co doping on the microstructural and nonlinear optical characteristics of vanadium pentoxide nanoparticles, with increased Co concentration leading to expansion of unit cell and larger particle size. Enhanced nonlinearity is observed due to improved crystallinity, porosity, and carrier concentration, with optical nonlinearity influenced by incident laser power.
Article
Materials Science, Multidisciplinary
P. Divya, R. Annie Sujatha, N. Angeline Little Flower, G. Vinitha, K. Mani Rahulan
Summary: In this study, Cr3+ doped PbWO4 nanoparticles with different concentrations of Cr3+ were synthesized using a chemical method. The structural, morphological, and optical properties of the nanoparticles were characterized using various techniques. The results showed that the optical properties of the nanoparticles were altered by the Cr3+ doping, indicating their potential applications in optical devices.
Article
Engineering, Electrical & Electronic
Marzieh Nadafan, Malihe Mousavi
Summary: Thin films of V2O5:Co nanocomposite were deposited by thermal deposition method. Structural analyses showed all samples had a single orthorhombic phase of alpha-V2O5:Co. Additionally, doping V2O5 with Co caused a slight shift in XRD peak positions, indicating an increase in interatomic distances. The nanoparticle size of V2-xCoxO5 (x = 0-0.2) increased with Co doping, and the optical bandgap of the samples widened with increasing x values. The nonlinear optical properties of the thin films were investigated and showed an increase in nonlinear responses with increasing laser power intensity. The samples exhibited both self-defocusing and saturable absorption effects.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Materials Science, Ceramics
A. S. Jayasree, K. Mani Rahulan, R. Annie Sujatha, G. Vinitha, N. Angeline Little Flower
Summary: The third order nonlinear optical properties of Ni doped ZnMoO4 nanostructures with different concentrations of Ni were investigated. It was found that the absorption edge of the nanostructures shifted slightly towards longer wavelength and an additional absorption band appeared at 440 nm upon Ni doping. The synthesized nanostructures exhibited reverse saturable absorption and negative nonlinearities under the continuous wave laser. The measured third order nonlinear optical susceptibility was approximately 10-6 esu, indicating that the nonlinear optical characteristics of the nanostructures could be controlled by Ni doping and making them a potential candidate for optical device applications.
CERAMICS INTERNATIONAL
(2022)
Article
Physics, Multidisciplinary
Nader Daneshfar, Maryam Mohammadbeigi
Summary: The purpose of this study is to investigate the nonlinear optical properties of hybrid nanostructure molecules consisting of a semiconductor quantum dot and metal nanoparticles or a plasmonic nanoshell. The nonlinear refractive index and absorption coefficient, which have various applications, are examined in relation to the third- and fifth-order nonlinearities of the quantum dot. The presence of two metallic nanoparticles or a plasmonic nanoshell significantly alters the nonlinear optical susceptibilities compared to a simple hybrid system with a single metal nanoparticle. The size of the quantum dot, electric field polarization, and distance between nanoparticles also affect the spectrum position and magnitude of the third- and fifth-order nonlinear optical response.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Chemistry, Applied
Yuehua Yuan, Wenfa Zhou, Yongjun Zhu, Maozhong Tian, Yutao Zheng, Zefeng Shi, Feng Feng, Yinglin Song
Summary: Two novel ethyne-linked polymers (P1 and P2) were synthesized and their nonlinear optical properties were investigated. The results showed that both polymers exhibit reverse saturable absorption and self-defocusing, with two photon absorption being the dominant nonlinear absorption mechanism. Additionally, the polymers also display negative excited-state refraction.
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
Engineering, Electrical & Electronic
M. Shalini, M. Meena, R. S. Sundararajan, B. Samuel Ebinezer, T. C. Sabari Girisun, E. Manikandan
Summary: This study successfully developed a semi-organic crystal LMBN with nonlinear optical properties. The crystal structure, physical properties, and optical characteristics of LMBN were verified through various testing methods. The research found that LMBN crystal has high transparency, low strength, excellent surface morphology, and optical limiting performance. This crystal has significant potential applications in optical technology.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Chen-Sheng Lin, Duncan W. E. Allsopp, Kate Cavanagh, Hei Chit Leo Tsui, Ling-Shan Yu, Wang-Nan Wang, Andrei Mihai, Bin Zou, Michelle A. Moram
Summary: This study presents a method to achieve room-temperature 335nm UV electroluminescence from a simple AlGaN-based MIS LED, avoiding the use of p-doped material and utilizing tunneling effect to generate the necessary holes in a thin AlN barrier. This design is a potential option to overcome the issue of poor thermal excitation of holes in AlGaN-based pn junction devices.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2021)
Review
Chemistry, Physical
Dumitru Sirbu, Folusho Helen Balogun, Rebecca L. Milot, Pablo Docampo
Summary: Layered hybrid perovskites (LPKs) offer a solution to perovskite stability issues for energy harvesting, but their performance still lags behind due to poor charge transport. A balance between efficiency and stability is needed, with a need for understanding optoelectronic processes and rational design of interlayer cations. Complementary measurement techniques are crucial for identifying device bottlenecks and improving material performance.
ADVANCED ENERGY MATERIALS
(2021)
Article
Optics
Meng Huang, Shiyu Sun, Dong Wu, Haonan Ren, Li Shen, Thomas W. Hawkins, John Ballato, Ursula J. Gibson, Anna C. Peacock
Summary: Stimulated Raman amplification was observed in tapered silicon core fiber platform for the first time, showing potential for producing compact and robust Raman amplifiers and lasers. Numerical simulations indicated a maximum gain of 6dB could be achieved with only 48mW of pump power in the fiber.
Article
Physics, Multidisciplinary
Ozan Aktas, Yuji Yamamoto, Mehmet Kaynak, Anna C. Peacock
Summary: This study investigates the fabrication of in-plane heterostructures within silicon-germanium films through finite-element-method-based phase-field modelling and experimental work. The results demonstrate the potential for creating various in-plane heterostructures using laser processing, with applications in advanced semiconductor devices. This research provides insights into controlling phase segregation in semiconductor alloys for nanostructure formation.
COMMUNICATIONS PHYSICS
(2021)
Review
Engineering, Electrical & Electronic
Hei Chit Leo Tsui, Noel Healy
Summary: In recent years, semiconductor optoelectronic fiber technology has rapidly developed by integrating the optical and electronic functionality of semiconductor materials into a fiber geometry, opening up possibilities such as in-fiber frequency generation, signal modulation, photodetection, and solar energy harvesting. This review provides an overview of the state-of-the-art in semiconductor optoelectronic fibers, including fabrication and post-processing methods, materials and their optical properties. Applications in nonlinear optics, optical-electrical conversion, lasers, and multimaterial functional fibers are also highlighted.
FRONTIERS OF OPTOELECTRONICS
(2021)
Review
Optics
T. Sylvestre, E. Genier, A. N. Ghosh, P. Bowen, G. Genty, J. Troles, A. Mussot, A. C. Peacock, M. Klimczak, A. M. Heidt, J. C. Travers, O. Bang, J. M. Dudley
Summary: Researchers are working on improving the performance of supercontinuum sources, including extending wavelength coverage, enhancing stability, reducing noise, and increasing output power. In recent years, significant advances have been made in the study of specialty optical fibers, covering a wide range of applications in the mid-infrared, ultraviolet, and ultra-low-noise coherent supercontinuum light fields.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Optics
Shiyu Sun, Meng Huang, Dong Wu, Li Shen, Haonan Ren, Thomas W. Hawkins, John Ballato, Ursula J. Gibson, Goran Z. Mashanovich, Anna C. Peacock
Summary: A strong Raman enhancement is achieved in a silicon core fiber (SCF) when pumped with a continuous-wave source, leading to improved four-wave mixing (FWM) conversion efficiency. By tapering the SCFs, the role of phase-matching on the conversion enhancement is investigated, and large Raman enhanced FWM conversion efficiencies are obtained by optimizing the tapered waist diameter.
Article
Multidisciplinary Sciences
Ronit Sohanpal, Haonan Ren, Li Shen, Callum Deakin, Alexander M. Heidt, Thomas W. Hawkins, John Ballato, Ursula J. Gibson, Anna C. Peacock, Zhixin Liu
Summary: This study demonstrates frequency comb generation using a fully-fibre integrated silicon core fibre as a nonlinear mixer. The all-fibre, cavity-free source combines the material benefits of planar waveguide structures with the advantageous properties of fibre platforms to achieve a flat, high power frequency comb source with narrow linewidth and high optical signal-to-noise ratio.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Applied
Davide Moia, Ilario Gelmetti, Philip Calado, Yinghong Hu, Xiaoe Li, Pablo Docampo, John de Mello, Joachim Maier, Jenny Nelson, Piers R. F. Barnes
Summary: This study demonstrates that electroabsorption measurements can track changes in the electric field within the active layer. The electric field strength decreases for externally applied low-frequency voltages or long times following voltage steps. This method has the potential to become a routine characterization tool for optimizing hybrid perovskite devices.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Thomas Pope, Yvelin Giret, Miriam Fsadni, Pablo Docampo, Chris Groves, Thomas J. Penfold
Summary: This paper investigates the influence of dipole moment and structural order on the hole mobility of organic molecular semiconductors using Kinetic Monte Carlo (KMC) method. The results show that the dipole-dipole interactions lead to energy barriers, restricting the charged particles to smaller regions and reducing the mobility.
ORGANIC ELECTRONICS
(2023)
Article
Chemistry, Physical
Muhammad Saddam Hossain, Fiaz Ahmed, Stavros G. Karakalos, Mark D. Smith, Namrata Pant, Sophya Garashchuk, Andrew B. Greytak, Pablo Docampo, Linda S. Shimizu
Summary: This study reports on the structural, computational, and conductivity studies of urea-directed self-assembled iodinated triphenylamine derivatives. It compares the assembled structures of different derivatives and their charge transport properties, showcasing one derivative with higher conductivity due to urea hydrogen bonding and specific interactions, making it a potential dopant-free p-type hole transporter.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Michele Cariello, Namrata Pant, Alexander H. Harkiss, Frances M. Tracey, Joseph Cameron, Peter J. Skabara, Peter J. Holliman, Pablo Docampo, Graeme Cooke
Summary: Spiro-OMeTAD, a commonly used hole-transporting material, has drawbacks in terms of stability, conductivity, and hole mobility. Therefore, the synthesis of new derivatives with improved charge transporting properties remains important. In this study, a novel synthetic route for unsymmetrically functionalised Spiro-OMeTAD derivatives was developed, and the synthesized materials showed higher conductivity values than Spiro-OMeTAD. Solar cells using the synthesized derivatives exhibited higher power conversion efficiencies compared to those using Spiro-OMeTAD.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2022)
Review
Materials Science, Multidisciplinary
Ozan Aktas, Anna C. Peacock
Summary: The research explores the application of laser thermal processing in group IV semiconductor photonic systems, involving flexible manufacturing and postprocessing methods, as well as compatibility with different materials. Laser processing has enabled the production of semiconductor waveguides with high crystallinity and low optical losses, allowing for post-fabrication trimming of device characteristics and direct writing of tunable strain and composition profiles for bandgap engineering and optical waveguiding.
ADVANCED PHOTONICS RESEARCH
(2021)