Explanipedia

Unlocking megawatt-peak-power laser emission with colloidal quantum dots Open

Yuting Wu, Yuting Wu, Hancheng Zhu, Zhigao Huang, Hao Zhang , et al. · 2025

Output power of a laser device critically defines the application prospects. Colloidal quantum dots (QDs) have emerged as auspicious laser media; however, the exclusively low-power emission obscures the practical deployment. Here, we resol…

Terahertz light driven coherent excitation of a zone-folded Raman-active phonon mode in the Spin-Ladder System $α'$-NaV$_2$O$_5$ Open

Giorgianni Flavio, Romani, Martina, Puphal Pascal, Isobe, Masahiko, Spitz, Leonie , et al. · 2025

We investigate the out-of-equilibrium lattice dynamics in the spin-ladder system $α'$-NaV$_2$O$_5$ using intense terahertz (THz) pump and near-infrared (NIR) probe spectroscopy. When quasi-single-cycle THz pulses interact with $α'$-NaV$_2$…

Development of a Kerr-lens mode-locked Cr:ZnS laser and a nonlinear frequency conversion stage for broadband mid-infrared spectroscopy Open

Meyer, Johann Gabriel · 2025

The detection of diseases by a quick measurement of a sample of breath or blood would provide a minimal invasive and valuable method for medical diagnostics. Broadband and coherent mid-infrared sources could enable the sensitive detection …

Temporally Gated Active Thermography for Defect Detection in Laser-Based Powder Bed Fusion of Metals - Dataset Open

Sauer Christian, Schiffler, Andreas, Höfflin, Dennis, Hartmann Jürgen · 2025

This HDF5-dataset contains in-situ high-speed infrared thermography data acquired during the Laser-Based Powder Bed Fusion (PBF-LB/M) process. The data was collected using a Synchronized Path Infrared Thermography (SPIT) setup, which emplo…

Temporally Gated Active Thermography for Defect Detection in Laser-Based Powder Bed Fusion of Metals - Dataset Open

Sauer Christian, Schiffler, Andreas, Höfflin, Dennis, Hartmann Jürgen · 2025

This HDF5-dataset contains in-situ high-speed infrared thermography data acquired during the Laser-Based Powder Bed Fusion (PBF-LB/M) process. The data was collected using a Synchronized Path Infrared Thermography (SPIT) setup, which emplo…

A Review on the Laser Diode Open

Muhammad Arif Bin Jalil · 2025

Similar to a light-emitting diode, a laser diode (LD), sometimes injection laser diode, ILD, semiconductor laser, or diode laser is a semiconductor device that can produce lasing conditions at its junction when a diode is directly pumped w…

A Study on the Free Electron Laser Open

Muhammad Arif Bin Jalil · 2025

A free-electron laser (FEL) is a fourth-generation light source that produces short bursts of extremely intense radiation.Similar to a laser, a FEL uses relativistic electrons as a gain medium rather than stimulated emission from atomic or…

Terahertz 3-8 Decoder Using Graphene-Based Triple-Meander-Line Filter Metasurface Open

Guang Zhao, Xinxin Zhang, Mingxuan Guo, Huirong Wang, Yifan Tang , et al. · 2025

This study proposes a terahertz metasurface decoder based on a triple-meander-line filter structure. By incorporating controllable openings into each level of the triple-meander-line metallic arms, a structure combination logic analogous t…

Fiber-optic platform for infrared laser thermogenetic stimulation and multimodal optical readout in freely moving animals Open

Maxim Solotenkov, Dmitry Maltsev, Andrei Fedotov, Sergey Kilin, Yuliya Ermakova , et al. · 2025

Localized Thermomechanical Measurements of Polymers and Blends with AFM-IR Open

Carina Yi Jing Lim, Zhenan Bao, Lukas Michalek · 2025

Understanding the thermomechanical behavior of heterogeneous polymer systems is crucial for material design. Herein, we introduce a novel technique that couples chemistry-selective infrared (IR) heating with atomic force microscopy (AFM) n…

Enhancing Infrared Laser Dissociation of Molecules with the Electromagnetic Vacuum Open

Triana, Johan F., Herrera, Felipe · 2025

Controlling bond breaking is a long-standing goal in molecular physics. Infrared nanocavities are currently being developed for reaching exotic coupling regimes of cavity QED with a few molecules, but it is not well understood how chemical…

Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient Infrared Spectroscopy 2.0 Open

Hamm, Peter · 2025

Enhancing Infrared Laser Dissociation of Molecules with the Electromagnetic Vacuum Open

Triana, Johan F., Herrera, Felipe · 2025

Controlling bond breaking is a long-standing goal in molecular physics. Infrared nanocavities are currently being developed for reaching exotic coupling regimes of cavity QED with a few molecules, but it is not well understood how chemical…

Versatile Femtosecond Laser Synchronization for Multiple-Timescale Transient Infrared Spectroscopy 2.0 Open

Hamm, Peter · 2025

Spectroscopic Detectionand Characterization of Cyanooxomethylium,NCCO<sup>+</sup> Open

Marcel Bast (12463428), Julian Böing (22654949), Thomas Salomon (14001852), Eline Plaar (16831108), Igor Savić (22654952) , et al. · 2025

Cyanooxomethylium, NCCO⁺, a fundamental linear acylium ion, has been observed spectroscopically for the first time using action spectroscopy in ion trap apparatuses. A first low-resolution infrared spectrum was obtained between …

In-situ observation of melting behavior depending on laser power during laser powder bed fusion using X-ray images Open

Misora Maruyama, Yuta Kushiya, Naoko SATO, Naoki Seto, Shinsuke Suzuki · 2025

This study aimed to clarify the shape of the droplet and depression zone of pure titanium under overhang conditions during Laser Powder Bed Fusion through in-situ observations using X-ray imaging. To simulate the fabrication of an overhang…

Efficient continuous wave ultraviolet Pr3+:YLF laser at 249.6 nm Open

Yi Yao, Yue Zhao, Yan Song, Chuanbo Wang, Jidong Li , et al. · 2025

Pr ³⁺ :YLF continuous wave(CW)cyan laser from ³ P ₀ to ³ H ₄ transition is first demonstrated at 499.2 nm. The 249.6 nm deep ultraviolet laser (DUV) is obtained with the method of effi…

A candidate for replacing industry standards in terahertz generation Open

Katherine De Lange · 2025

The nonlinear optical crystal BNA can possibly be replaced by F-BNA, its derivative, in terahertz spectroscopy due to the latter’s terahertz generation capability and damage threshold

Liouvillian Superoperator and Maxwell–Bloch Dynamics Under Optical Feedback via the Self-Mixing Effect in Terahertz Quantum Cascade Lasers Open

Aleksandar Demić, Zoran Ikonic, Paul Dean, Xiaoqiong Qi, Thomas Taimre , et al. · 2025

We present a Maxwell–Bloch dynamics model for Terahertz Quantum Cascade Lasers (THz QCLs) that integrates a density matrix transport model, independent of the number of states per QCL period, with the Maxwell wave equation under the slow-v…

Terahertz semiconductor laser chaos Open

Binbin Liu, Carlo Silvestri, Kang Zhou, Xuhong Ma, Shumin Wu , et al. · 2025

In the terahertz (THz) range, due to the lack of effective THz light sources, chaos generation in THz semiconductor lasers, e.g., quantum cascade lasers (QCLs), is particularly challenging. Here, we experimentally demonstrate a THz chaos s…

Hysteresis-controlled Van der Waals tunneling infrared detector enabled by selective layer heating Open

Dmitry A. Mylnikov, Ilya V. Safonov, Mikhail A. Kashchenko, Kostya S. Novoselov, Denis A. Bandurin , et al. · 2025

Mid-infrared (mid-IR) photodetectors play a crucial role in various applications, including the development of biomimetic vision systems that emulate neuronal function. In this work, we demonstrate a new infrared photodetector based on gra…

Watt-level polarization-maintaining Er3+: ZBLAN fiber laser tunable from 3.4 µm to 3.7 µm Open

Ammar Hideur, Saad Hatim, Tristan Guezennec, Kirill Eremeev, Pierre-Henry Hanzard , et al. · 2025

We demonstrate a linearly polarized Er3+: ZBLAN fiber laser in the dual wavelength pumping scheme for laser emission in the 3.4-3.7 µm spectral band. The laser is based on a polarization-maintaining heavily erbium-doped ZBLAN fiber dually …

Study on pre-bunched free electron laser in the terahertz wavelength range Open

Kobayashi,Tatsuki, Zen, Heishun, Sakaue Kazuyuki, Kashiwagi Shigeru · 2025

We have been studying about a pre-bunched FEL in the THz region. In the pre-bunched FEL, the electron bunches being compressed shorter than the oscillation laser wavelength, it is expected that we can generate short-pulse THz laser pulses …

Carrier scattering from terahertz quantum cascade laser obtained by near-infrared pump-probe spectroscopy Open

Shenbo Zhu, Yuan Li, Xiaolin Zeng, Jing Wu, Feng-Min Cheng , et al. · 2025

In this study, a near-infrared pump-probe spectroscopy method was established to obtain the intersubband and intrasubband carrier scattering processes in the conduction band of the active region of terahertz quantum cascade laser (THz-QCL)…

Kinetic study of terahertz generation based on the interaction of two-color ultra-short laser pulses with molecular hydrogen gas Open

MS Soltani Gishini (22423408), A Ganjovi (22417330), M Saeed (7703561) · 2025

In this work, using a two dimensional particle in cell-Monte Carlo collision simulation scheme, interaction of two-color ultra-short laser pulses with the molecular hydrogen gas (H2) is examined. The operational laser parameters, i.e., its…

Study of terahertz generation via the interaction of two-color ultra-short laser pulses with water vapor plasmas Open

MS Soltani Gishini (22423408), A Ganjovi (22417330) · 2025

In this work, using a two dimensional particle in cell-Monte Carlo collision simulation scheme, the Terahertz (THz) generation process via the interaction of a two-color ultra-short laser pulses with the water vapor gas (H2O) is examined. …

THz Radiation Generation via the Interaction of Ultra-short Laser Pulses with the Molecular Hydrogen Plasma Open

MS Soltani Gishini (22423408), A Ganjovi (22417330), M Saeed (7703561) · 2025

In this paper, a two dimensional Particle In Cell‐Monte Carlo Collision simulation scheme is used to examine the THz generation via the interaction of high intensity ultra‐short laser pulses with an underdense molecular hydrogen plasma sla…

On‐Chip Control of Electron Emission with an Active Terahertz Metasurface Open

Matej Sebek, Tobias Buchmann, Peter Uhd Jepsen, Simon Jappe Lange · 2025

Terahertz (THz) radiation has emerged as a powerful tool for inducing ultrafast electron emission and controlling electron beams, with applications in photonics and electron microscopy. Here, the first realization of on‐chip electron emiss…

Performance Comparison of 3D-Printed Terahertz Waveplates Fabricated from PLA, ABS, and HIPS Open

Gabriel Figueiredo de Freitas, Lucas T. Roque, Nicolas M. Kawahala, F. G. G. Hernández · 2025

We report the fabrication and characterization of birefringent terahertz (THz) waveplates produced via fused deposition modeling (FDM) 3D printing using three widely available thermoplastic filaments: polylactic acid (PLA), acrylonitrile b…

Peering Inside with Terahertz Waves: An Introduction to Nondestructive Testing Open

Yuma Takida, Hiroaki Minamide · 2025

Far-infrared laser