Article
Physics, Applied
Hui Zi, Wai Yuen Fu, Yuk Fai Cheung, Benjamin Damilano, Eric Frayssinet, Blandine Alloing, Jean-Yves Duboz, Philippe Boucaud, Fabrice Semond, Hoi Wai Choi
Summary: This paper investigates the lasing characteristics of optically-pumped GaN microdisks with different configurations. The microdisks are fabricated from various epitaxial structures and undergo different processes to achieve different degrees of optical confinement. The findings show that the lasing characteristics are influenced by material qualities, optical confinement, and overlap factors with the multi-quantum wells in the microdisk structures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Xiuqin Zhan, Fa-Feng Xu, Zhonghao Zhou, Yongli Yan, Jiannian Yao, Yong Sheng Zhao
Summary: The study demonstrates full-color 3D laser displays based on circularly polarized lasers and inkjet-printed cholesteric liquid crystal arrays, showcasing vibrant colors and high fidelity in display quality.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Antonino Madonia, Gianluca Minervini, Angela Terracina, Ashim Pramanik, Vincenzo Martorana, Alice Sciortino, Carlo M. Carbonaro, Chiara Olla, Teresa Sibillano, Cinzia Giannini, Elisabetta Fanizza, Maria L. Curri, Annamaria Panniello, Fabrizio Messina, Marinella Striccoli
Summary: Carbon dots with high efficiency red emission have been synthesized by solvothermal method using Neutral Red as a precursor. The obtained nanoparticles exhibit intense luminescence in the red region, comparable to the starting dye, and are capable of emitting light in the solid-state.
Article
Chemistry, Multidisciplinary
Fengfeng Yao, Yanbo Pei, Chunfeng Hou, Xiudong Sun
Summary: This study investigates the dependence of random lasing properties on the gain volume in dye doped nematic liquid crystals. By changing the distance between the focal point and the sample, the transition process from Fabry-Perot like mode to random mode was observed, suggesting underlying mechanisms. These observed pump volume dependent lasing properties could be used to manipulate the mode and threshold of random lasers.
Article
Physics, Applied
D. V. Lebedev, A. M. Mintairov, A. S. Vlasov, M. M. Kulagina, Yu. A. Guseva, S. I. Troshkov, G. Juska, E. Pelucchi, A. Gocalinska
Summary: This study describes the growth, material characterization, and lasing of InP/GaInP quantum dot microdisks. Two types of InP/GaInP quantum dots with different heights and emission decay lifetimes were observed. The findings also show that lasing occurs via the excited states of a specific type of quantum dots, which is important for technological microlasing applications.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Nideesh Padiyakkuth, Rodolphe Antoine, Nandakumar Kalarikkal
Summary: Random lasers are light sources without mirrors, which derive feedback from multiple scattering and have poor spatial coherence and directionality. By adding nanoclay to a laser dye solution with suspended scatterers, a disordered active medium can be created for colloidal random lasers. The dependence of gain medium and scatterer concentration on the linewidth of colloidal random lasers was investigated under single-shot nanosecond pumping.
Article
Optics
Sami Slimi, Venkatesan Jambunathan, Ghassen Zin Elabedine, Haohai Yu, Huaijin Zhang, Weidong Chen, Rosa Maria Sole, Magdalena Aguilo, Francesc Diaz, Martin Smrz, Tomas Mocek, Xavier Mateos
Summary: We conducted optical spectroscopy and CW laser operation of ytterbium-doped yttrium gallium garnet (Yb:YGG) crystal at cryogenic temperatures. The study determined a maximum absorption cross-section of 1.7 x 10-20 cm2 centered at 970.5 nm with a spectral bandwidth of 2.4 nm, and a maximum emission cross-section of 6.5 x 10- 20 cm2 centered at 1024 nm with a spectral bandwidth of 4.6 nm at 120 K. Cryogenic continuous-wave laser operation was achieved using a VBG stabilized laser diode as the pump source emitting around 969 nm. At 120 K, a maximum output power of 17.50 W was obtained at 1024 nm with a slope efficiency of 87%, relative to the absorbed power.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Jian Wang, Xiaohao Jia, Yalu Guan, Kuankuan Ren, Haichao Yu, Zhijie Wang, Shengchun Qu, Qingxin Yang, Jie Lin, Zhanguo Wang, Peng Jin
Summary: This study compared plasmonic lasers and photonic counterparts based on CH3NH3PbBr3 perovskite nanowires, and found that they have the same gain origination. The results show that an electron-hole plasma contributes to both types of lasing actions from perovskite nanowires at room temperature.
LASER & PHOTONICS REVIEWS
(2021)
Article
Materials Science, Multidisciplinary
Giovanni Morello, Maria Moffa, Martina Montinaro, Annachiara Albanese, Karolis Kazlauskas, Saulius Jursenas, Ausra Tomkeviciene, Juozas Grazulevicius, Andrea Camposeo, Dario Pisignano
Summary: The optical gain of electrospun polystyrene fibers doped with a multi-fragment molecular dye has been studied. Aligned fibers show enhanced performance and the gain spectrum can be tuned by adjusting the dye concentration. On the other hand, randomly oriented fibers exhibit random lasing with a manifold of spectral line narrowing. Increasing the dye content reduces the lasing threshold and allows tuning of the laser emission wavelength. These findings highlight the potential of these fibers for variable-gain, broadband lasing in optical sensing and tunable microlaser devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Optics
Chaojun Shi, Shuhong Li, Zhongchang Zhu, Yunlong Liu, Shuai Wang, Ling Zhao, Qiang Shi, Qinglin Wang, Xiaochen Dong, Wenjun Wang
Summary: This paper optimizes the ASE properties of CBP: 2wt% BUBD-1 blend films by introducing buffer layers containing silver nanoparticles (Ag NPs). The lowest ASE threshold is significantly reduced and the gain factor is enhanced when the buffer layer with 25 vol% Ag NPs is introduced. The results demonstrate the potential application of metal nanoparticle-modified buffer layers in improving the lasing performance of organic small molecules.
Article
Materials Science, Multidisciplinary
Kamila Lupinska, Martyna Durko-Maciag, Chantal Andraud, Yann Bretonniere, Piotr Hanczyc, Piotr Fita, Piotr Szulim, Jaroslaw Mysliwiec, Lech Sznitko
Summary: The 2,4,6-OMe-TCF dye with aggregation-induced emission (AIE) phenomenon is studied for laser light generation. Strong light amplification is possible only for concentrated solutions near saturation level, indicating the essential role of aggregation in enhancing light emission. Additionally, powdered form of the dye also exhibits lasing, but with a red-shifted gain profile. The dye can be used both in liquid solution and as dopant for polymeric matrices, making it suitable for soft and elastic materials in printed optoelectronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yongyu Cha, Shuai Li, Zuofang Feng, Rongjiao Zhu, Hongbing Fu, Zhenyi Yu
Summary: This article presents a multifunctional gain material with high optical gain and triplet utilization, serving as both a thermally activated delayed fluorescence emitter and a phosphorescence source.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Liqing Zhu, Yichun Pan, Linqi Chen, Zheng Wang, Fangxin Zhang, Guangran Yang, Changchang Huang, Wenping Hu, Long Zhang, Yingjun Zhang, Hongxing Dong, Weihang Zhou
Summary: We demonstrate the realization of tunable single-mode polariton lasing from highly excited Rydberg states by engineering the symmetry of the polaritonic wave function. By controlling the potential wells and the spatial overlap between the gain region and the eigen mode, we achieve single-mode lasing from quantized polariton states. The asymmetry of the potential well enables single-mode lasing even for the highly excited Rydberg state. The excellent reservoir-eigenmode overlap and efficient spatial confinement significantly reduce the lasing threshold compared to conventional pumping schemes.
Article
Chemistry, Multidisciplinary
Jie Liu, Yujie Chen, Feng Jin, Jingxia Wang, Tomiki Ikeda, Lei Jiang
Summary: This study successfully achieved multiwavelength laser output in dye-doped blue-phase liquid crystal films and controlled the wavelength and number of lasers by adjusting different parameters. These surface-emitting lasers can serve as light sources for next-generation optical devices.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Rui Duan, Zitong Zhang, Lian Xiao, Tianhua Ren, Xuehong Zhou, Yi Tian Thung, Van Duong Ta, Jun Yang, Handong Sun
Summary: In this study, a new oscillation mode, dome-shaped mode (DSM), is discovered in liquid crystal (LC) microlasers. These LC soft-matter microlasers achieve a record high Q-factor over 24,000. Proof-of-concept demonstration of red, green, blue (RGB) LC-DSM microlaser pixels with a 74% broader achievable color gamut than the standard RGB color space is successfully presented. Additionally, the proposed LC-DSM microlaser shows excellent potential in ultra-high sensitivity detection with a low detection limit of 0.5 ppm for acetone vapor molecules.
CHEMICAL COMMUNICATIONS
(2023)
Biographical-Item
Nanoscience & Nanotechnology
Alvaro Blanco, F. Javier Garcia de Abajo, Antonio Garcia Martin, Luis M. Liz-Marzan, Cefe Lopez
Article
Chemistry, Physical
Francisco Gallego-Gomez, Judit Farrando-Perez, Cefe Lopez, Joaquin Silvestre-Albero
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Jose Angel Pariente, Niccolo Caselli, Carlos Pecharroman, Alvaro Blanco, Cefe Lopez
Article
Optics
Niccolo Caselli, Antonio Consoli, Angel Maria Mateos Sanchez, Cefe Lopez
Summary: RFID technology uses radio frequency signals for identification, tracking, and management of objects, with systems typically consisting of RFID tags, readers, and data processing systems. Tags are implanted in objects, information is read by readers and transmitted to data systems for identification and management purposes.
Article
Optics
G. L. Whitworth, J. Jaramillo-Fernandez, J. A. Pariente, P. D. Garcia, A. Blanco, C. Lopez, C. M. Sotomayor-Torres
Summary: Passive daytime radiative cooling is a promising approach for addressing global energy demand associated with refrigeration technologies, by enhancing the emittance of polar dielectric surfaces. The use of self-assembled silica photonic crystals has shown potential in achieving significantly lower temperatures through outcoupling surface-phonon polaritons (SPhPs) into free-space. Additionally, the simulation of soda-lime glass micro-shells also suggests a considerable reduction in temperature below ambient levels.
Article
Chemistry, Multidisciplinary
Jose Angel Pariente, Alvaro Blanco, Cefe Lopez, John G. Gibbs
Summary: Investigated the effect of self-propelled, catalytic Janus microspheres on the ring stains left behind during the drying of a geometrically confined suspension containing such particles. The magnitude of activity can be controlled by adjusting the volume concentration of aqueous H2O2 within the suspension, which strongly influences the ring-shaped microstructures obtained.
Article
Optics
Antonio Consoli, Niccolo Caselli, Cefe Lopez
Summary: The researchers present a cost-effective approach to creating electrically driven random lasers by modifying commercially available laser diodes.
Review
Chemistry, Multidisciplinary
Cefe Lopez
Summary: Artificial intelligence is growing stronger, and materials science can benefit from it by using machine learning techniques to design and optimize new materials, systems, and processes. Understanding how machine learning can enhance the conception of advanced materials is crucial for future materials scientists. This review provides knowledge of computation and machine learning methods, and explores the impact of these techniques on the development of new advanced materials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jose Angel Pariente, Farzaneh Bayat, Alvaro Blanco, Antonio Garcia-Martin, Carlos Pecharroman, Manuel I. Marques, Cefe Lopez
Summary: By preparing colloidal crystals with random missing scatterers, crystals are created where disorder is embodied as vacancies in an otherwise perfect lattice. In this system, there is a critical defect concentration where light propagation undergoes a transition from a perfect reflector to an enhanced transmission phenomenon. This behavior can be phenomenologically described in terms of Fano-like resonances.
Review
Materials Science, Multidisciplinary
Antonio Consoli, Niccolo Caselli, Cefe Lopez
Summary: Artificial neural networks are widely used in various applications due to their ability to handle complex problems involving massive data sets. In recent years, photonics neural networks based on lasers have shown promising potential for their ultrafast, parallel operation and high energy efficiency. Random lasers have emerged as a novel concept for creating nonlinearity and complexity in photonics neural networks. This review paper discusses the framework and recent advances in networks of coupled lasers, as well as the challenges and potential solutions of using random lasers in photonic networks. Harnessing the unique properties of random lasers can open up new possibilities for photonics technology in fields such as image recognition and encryption.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Nanoscience & Nanotechnology
Jose Angel Pariente, Alvaro Blanco, Cefe Lopez
Summary: The article introduces a simple in-situ, real-time optical characterization technique for studying the crystallization process of silica colloidal suspensions. This technique allows for monitoring the formation process of crystals and analyzing their dynamics, which is crucial for the quality of the final sample.
Proceedings Paper
Engineering, Electrical & Electronic
Antonio Consoli, Niccolo Caselli, Cefe Lopez
2021 CONFERENCE ON LASERS AND ELECTRO-OPTICS EUROPE & EUROPEAN QUANTUM ELECTRONICS CONFERENCE (CLEO/EUROPE-EQEC)
(2021)