Article
Optics
Vyacheslav A. Trofimov, Dmitry M. Kharitonov, Mikhail Fedotov
Summary: This paper proposes a new scheme for fifth harmonic generation based on cascading third harmonic generation, which can improve frequency up-conversion efficiency. The feasibility of this scheme is theoretically demonstrated using multi-scale approach and can be applied directly to femtosecond pulses in a medium with cubic nonlinear response.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Eva Arianna Aurelia Pogna, Michele Celebrano, Andrea Mazzanti, Lavinia Ghirardini, Luca Carletti, Giuseppe Marino, Andrea Schirato, Daniele Viola, Paolo Laporta, Costantino De Angelis, Giuseppe Leo, Giulio Cerullo, Marco Finazzi, Giuseppe Della Valle
Summary: Enhancing nonlinear optical effects through nanoscale engineering is a hot research topic. Experimental demonstration of ultrafast all-optical modulation of the second harmonic from a single nanoantenna has the potential to lead to the development of nonlinear nanophotonic devices for a wide range of communication and sensing applications.
Article
Optics
Seunghwoi Han
Summary: Plasmonic high-order harmonic generation (HHG) is commonly used in nanoscale optical applications. This study theoretically calculates the plasmonic amplification in a metal-coated sapphire conical structure and analyzes its effects on HHG and sample damage.
CURRENT OPTICS AND PHOTONICS
(2022)
Article
Materials Science, Multidisciplinary
Xuefeng Xia, Chunyang Ma, Hualong Chen, Karim Khan, Ayesha Khan Tateen, Quanlan Xiao
Summary: In this study, a 2D black phosphorous (BP)/MXene (Ti3C2) heterostructure was successfully prepared by stacking BP and Ti3C2 using van der Waals forces, demonstrating its excellent stability in water and air, as well as its potential as an optical switch. Nonlinear properties were also shown through Z-scan measurements, indicating high modulation depth and small saturation intensity. The performance of the BP/Ti3C2 heterostructure as a saturable absorber in an Er-doped mode-locked fiber laser was demonstrated, achieving a 735 fs pulse duration at a center wavelength of 1559.8 nm, along with harmonic mode-locking at a peak repetition rate of 588 MHz. These results suggest significant potential applications of 2D BP/Ti3C2 heterostructures in ultrafast photonics.
Article
Nanoscience & Nanotechnology
Jicheng Jin, Jian Lu, Bo Zhen
Summary: Second harmonic dipoles generated in a nonlinear photonic crystal slab can be completely nonradiative, resulting in no energy transfer from the fundamental frequency to the second harmonic even when the phase-matching condition is satisfied - a phenomenon known as resonance-forbidden second-harmonic generation. Through numerical simulation, two mechanisms for achieving this phenomenon have been identified: symmetry protection and parameter tuning. The finite-size effect and the topological origin of this phenomenon are also discussed.
Article
Physics, Multidisciplinary
Meryem Benelajla, Elena Kammann, Bernhard Urbaszek, Khaled Karrai
Summary: Confocal microscopy is crucial for imaging in biological and physical sciences. Resonant fluorescence experiments are conducted under challenging cross-polarization conditions. Using reflective surfaces and a confocal arrangement, a high cross-polarization extinction ratio of over 108 is achieved, providing practical implications for various experiments.
Article
Chemistry, Multidisciplinary
Yoonsoo Rho, SeokJae Yoo, Daniel B. Durham, DongJun Kang, Andrew M. Minor, Costas P. Grigoropoulos
Summary: Nonlinear optical response is a useful tool for studying the properties of materials, but its weak signal and limited reach make it difficult to probe deep-subwavelength-scale nonlinear optics. In this study, we propose a new method using an SHG-active plasmonic nanotip to achieve efficient second harmonic generation (SHG) nanoscopy. Our simulations suggest that enhancing the nonlinear response of the sample or suppressing the tip's response can lead to a high near-field SHG contrast, providing evidence of quantum mechanical nonlinear energy transfer. Furthermore, this technique can be used to study nanoscale corrosion and other physicochemical phenomena.
Review
Nanoscience & Nanotechnology
Sylvain Gennaro, Raktim Sarma, Igal Brener
Summary: This review summarizes the research on controlling optical wavefronts and enhancing nonlinear effects using metasurfaces with arrays of nanoscale resonators. The study focuses on the generation of harmonic light in GaAs metasurfaces and all-dielectric metasurfaces coupled to intersubband transitions in III-V semiconductor heterostructures. The review concludes by discussing the potential of metasurfaces as a platform for on-chip quantum light generation.
Article
Chemistry, Multidisciplinary
Zhiyong Bai, Jihyun Lee, Heewon Kim, Yunseung Kuk, Myung-Ho Choi, Chun-Li Hu, Kang Min Ok
Summary: Establishing high-performance ultraviolet (UV) nonlinear optical (NLO) selenite crystals with well-balanced properties is challenging due to their strong absorption for UV light. In this study, a rare-earth selenite, Sc(HSeO3)(3), with excellent UV NLO properties is introduced. The crystal exhibits remarkably well-balanced UV-NLO functionality, making it a new example of discovering novel UV NLO selenite materials.
Article
Chemistry, Multidisciplinary
Song Zhu, Wenkai Li, Shengjie Yu, Natsumi Komatsu, Andrey Baydin, Fakun Wang, Fangyuan Sun, Chongwu Wang, Wenduo Chen, Chuan Seng Tan, Houkun Liang, Yohei Yomogida, Kazuhiro Yanagi, Junichiro Kono, Qi Jie Wang
Summary: Aligned and type-separated (semiconducting and metallic) carbon nanotubes films were synthesized and studied for their polarization-dependent third-harmonic generation (THG) processes in a broad spectral range. These films exhibited strong wavelength-dependent and intense THG signals, enhanced by exciton resonances, confirming their macroscopically 1D nature. The findings suggest potential applications of these films in various nonlinear photonic devices. Evaluation: 8/10.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Stuart May, Matteo Clerici, Marc Sorel
Summary: This study shows that engineering the dispersion of AlGaAs-OI waveguides has a significant impact on supercontinuum generation, allowing for broadband supercontinua. This novel platform has great potential in exploring fundamental physics and realizing highly efficient, compact nonlinear devices.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Vyacheslav A. Trofimov, Dmitry M. Kharitonov, Mikhail V. Fedotov, Yongqiang Yang, Di Wang, Zhiheng Tai
Summary: We propose using cascaded second-harmonic generation (SHG) to achieve frequency conversion in a way similar to that in a medium with cubic susceptibility. By introducing phase mismatching, we can efficiently generate third-harmonic waves. Theoretical predictions suggest a THG efficiency of 94.5%.
APPLIED SCIENCES-BASEL
(2023)
Article
Materials Science, Multidisciplinary
Wallace Jaffray, Matteo Clerici, Bram Heijnen, Alexandra Boltasseva, Vladimir M. Shalaev, Marcello Ferrera
Summary: Transparent conducting oxides show giant optical nonlinearities where their refractive index approaches zero. Here, the nonlinear optical absorption of low-index aluminium zinc oxide thin films is studied. Under optical excitation, the field penetration depth doubles, and the nonlinear spectral redistribution of the probe signal leads to local net gain. The study advances parametric amplification as a viable loss compensation process.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Zelin Hao, Wenwei Liu, Zhancheng Li, Zhi Li, Guangzhou Geng, Yanchun Wang, Hua Cheng, Hammad Ahmed, Xianzhong Chen, Junjie Li, Jianguo Tian, Shuqi Chen
Summary: Metasurfaces have shown great potential in optical wave manipulation but face challenges in multidimensional manipulation of harmonic waves generated by nonlinear metasurfaces. This study presents an efficient design strategy based on the hydrodynamic model of free electron dynamics, allowing for full complex-amplitude modulation of second harmonic generation. The proposed nonlinear metasurfaces demonstrate spin-selective SHG optical vortices with independent topological charges, opening up new possibilities for nonlinear metasurface applications in optical information and multifunctional integration.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Antoine Comby, Debobrata Rajak, Dominique Descamps, Stephane Petit, Valerie Blanchet, Yann Mairesse, Jerome Gaudin, Samuel Beaulieu
Summary: We report on the development of a high-repetition-rate monochromatic extreme ultraviolet source with polarization tunability, designed for multi-modal dichroism in time- and angle-resolved photoemission spectroscopy. The scheme uses an annular beam to separate the driving laser from the XUV beamlet while preserving the polarization tunability. This results in a high brightness source at 21.6 eV with ellipticities as high as 90%.
Article
Chemistry, Multidisciplinary
Truong-Son Dinh Le, Yeong A. Lee, Han Ku Nam, Kyu Yeon Jang, Dongwook Yang, Byunggi Kim, Kanghoon Yim, Seung-Woo Kim, Hana Yoon, Young-Jin Kim
Summary: The study presents a method to directly fabricate highly conductive and flexible microelectrodes on natural leaves using femtosecond laser pulses. This approach offers advantages such as simplicity, cost-effectiveness, and excellent performance, making it promising for applications in wearable electronics, smart homes, and the Internet of Things.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Yong Woo Kim, Byunggi Kim, Seungman Choi, Han Ku Nam, Hyunwoong Kim, Young-Jin Kim, Seung-Woo Kim
Summary: Optimizing EUV harmonics generated from crystals by pre-shaping the driving laser pulse via spectral phase modulation through a genetic algorithm can improve the EUV yield without increasing the incident laser fluence up to an order of magnitude.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Jaewon Yang, Hyun Jay Kang, Keunwoo Lee, Jaehyun Lee, Young-Jin Kim, Seung-Woo Kim
Summary: The paper outlines a free-space optical link system built outdoors over a 1.4 km path, capable of transmitting optical frequencies with fast beam tracking and atmospheric phase noise suppression. The system achieves a frequency transfer stability of 3.51 x 10(-19) at 100 s averaging, meeting the requirements for state-of-the-art optical clock signals.
OPTICS COMMUNICATIONS
(2022)
Review
Physics, Multidisciplinary
Jongkyoon Park, Amutha Subramani, Seungchul Kim, Marcelo F. Ciappina
Summary: High-order harmonic generation in solids is the nonlinear up-conversion of coherent radiation resulting from the interaction of a strong and short laser pulse with a solid sample. The use of plasmonic fields offers new possibilities for spatial and temporal manipulation with nanometric and attosecond resolution, providing novel avenues for solid-state high-order harmonic generation.
ADVANCES IN PHYSICS-X
(2022)
Article
Engineering, Industrial
Young-Jin Kim, Dongwook Yang, Han Ku Nam, Truong-Son Dinh Le, Younggeun Lee, Soongeun Kwon
Summary: This research converts Kevlar textiles into laser-induced graphene using ultrafast laser pulses, achieving high-speed strain sensors. These sensors have fast response time and high sensitivity, enabling real-time monitoring of human heartbeats, articular motions, and composite dynamics.
CIRP ANNALS-MANUFACTURING TECHNOLOGY
(2022)
Article
Optics
Jaeyoung Jang, Wooram Kim, Jeong Seok Oh, Seung-Woo Kim, Young-Jin Kim
Summary: A precise and stable laser beam positioning method using a pixelated binary grating (PBG) and a digital micromirror device (DMD) for high scanning speed was reported. The method demonstrated excellent performance in angular resolution and repeatability, with potential applications in precision metrology and high-speed target positioning.
OPTICAL ENGINEERING
(2022)
Article
Optics
Mun Ji Low, Thazhe Madam Rohith, Byunggi Kim, Seung-Woo Kim, C. S. Suchand Sandeep, Vadakke Matham Murukeshan, Young-Jin Kim
Summary: The study presents a method for simulating hybrid optical elements, attaching an ultra-thin, flexible diffractive optics array onto a refractive optical element. The proposed simulation scheme reduces the use of hardware resources and computational time while maintaining resolution and accuracy. Validation of the method was done through comparison of simulation and experimental results.
Article
Optics
Yoon-Soo Jang, Jinkang Lim, Wenting Wang, Seung-Woo Kim, Anatoliy Savchenkov, Andrey B. Matsko, Chee Wei Wong
Summary: The importance and method of subpicometer displacement measurements of a high Q optical cavity using PDH locking scheme for minute displacement measurements.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Physical
June Sik Hwang, Srinivasan Arthanari, Jong-Eun Park, Minyang Yang, Sanha Kim, Seung-Woo Kim, Huseung Lee, Young-Jin Kim
Summary: This paper proposes a method of using laser patterning to produce silver microhoneycomb structures. The pore size can be easily controlled through simple laser parameter changes. The study confirms the potential electrochemical applications of the microhoneycomb structures.
Article
Optics
Jaewon Yang, Dong Il Lee, Dong-Chel Shin, Jaehyun Lee, Byung Soo Kim, Hyun Jay Kang, Young-Jin Kim, Seung-Woo Kim
Summary: In this study, frequency comb-to-comb stabilization is achieved through coherent transfer of two separate comb lines via a freespace optical link, with strict control of atmospheric phase noise. This method has potential value in applications such as broadband molecular spectroscopy and ultra-stable microwave generation.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Chidanand Hegde, Chin Huat Joel Lim, Tan Hui Teng, Daobin Liu, Young-Jin Kim, Qingyu Yan, Hua Li
Summary: This article reports an alternative method for the synthesis and coating of alloys and multi-metal oxides using femtosecond laser direct writing. The process can be conducted at room temperature and in an open atmosphere, and is applicable to a large variety of oxides and alloys.
Article
Optics
Alexander Gliserin, Soo Hoon Chew, Seungchul Kim, Dong Eon Kim
Summary: In this paper, a new technique called PENGUIN is introduced, which preserves some spectral phase information by introducing intensity asymmetry into a conventional nonlinear interferometric autocorrelation. This technique enables the full reconstruction and precise characterization of ultrashort optical pulses, providing a less expensive and less complex alternative to traditional spectral measurements.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Tae-In Jeong, Dong Kyo Oh, San Kim, Jongkyoon Park, Yeseul Kim, Jungho Mun, Kyujung Kim, Soo Hoon Chew, Junsuk Rho, Seungchul Kim
Summary: It has been found that the nonlinear yield of nanoantennas at the boundary of a laser beam can deviate significantly from those at the center due to the non-uniformity of the beam intensity distribution. To address this issue, a method for reducing the density of a nanoantenna array has been proposed to increase the stability of third-harmonic generation. The method reduces the number of ambiguous nanoantennas at the beam boundary, resulting in a more stable output signal.
Article
Optics
Inhong Kim, Ga Eul Choi, Ming Mei, Min Woo Kim, Minju Kim, Young Woo Kwon, Tae-In Jeong, Seungchul Kim, Suck Won Hong, Kwangseuk Kyhm, Robert A. Taylor
Summary: The optical gain enhancement of two-dimensional CsPbBr3 nanosheets is studied with the guidance of a patterned structure of polyurethane-acrylate. The gain contour in the plane of spectrum energy and stripe length is obtained, showing enhanced gain and thermal stability due to increased optical confinement and heat dissipation.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Review
Nanoscience & Nanotechnology
San Kim, Tae-In Jeong, Jongkyoon Park, Marcelo F. Ciappina, Seungchul Kim
Summary: Surface plasmons are the collective oscillation of electrons that can manipulate optical fields with unprecedented spatial and time resolutions. They have various applications in chemical/biological sensors and Raman scattering spectroscopy. The ultrafast optical response is a fundamental characteristic of surface plasmons, allowing for the study of photon-electron interactions. The plasmon-enhanced electric fields generated by focusing surface plasmons can reach the strong field regime with low input laser intensities.
