Results 111 to 120 of about 7,836,199 (284)

Optical Parametric Generators and Amplifiers

, 2008
Mid-infrared parametric generators and amplifiers in quasi-phase-matched and birefirngence phase-matched nonlinear crystals are reviewed. Broadband mid-infrared generation using collinear and noncollinear parametric interactions is discussed.
Valdas Pasiskevicius, Pasiskevicius, Valdas,, Fredrik Laurell, Laurell, Fredrik,   +3 more
core   +1 more source

O Radical‐Induced n‐to‐p Transition in PbS Quantum Dots Enabling Enhanced and Stable Photogating in QD/IGZO SWIR Phototransistors

Advanced Materials Technologies, EarlyView.
An O radical‐induced n‐to‐p transition in PbS quantum dots (QDs) is achieved via atmospheric Ar/O2 treatment, enabling favorable band alignment and stable photogating in PbS QD/IGZO phototransistors. Interfacial defect passivation and Fermi‐level modulation, confirmed by XPS and UPS analyses, effectively suppress dark current, induce a positive VTH ...
MD Redowan Mahmud Arnob, Solbee Lee, Hansol Jeong, Sabiqun Nahar, Jin Jang   +4 more
wiley   +1 more source

2 μm Broadband Amplification in Tapered Fiber Devices Using PbS Quantum Dots

Photonics
Broadband optical amplifiers operating in the 2 μm spectral region are critical for advancing mid-infrared photonic systems, yet achieving high gain with low noise remains challenging.
Deen Wang, Siyu Wan, Chenxi Wang, Zhiyang Jin, Xiaolan Sun, Alan R. Kost, Seppo Honkanen   +6 more
doaj   +1 more source

Mid-Infrared Fiber Amplification of a DFB Interband Cascade Laser

The limited availability of powerful, tunable, and reliable mid-infrared sources has historically prevented their widespread adoption in spectroscopy applications, even if most greenhouse gases’ fundamental absorption lines are found in this region
Martin Bernier, Tommy Boilard, Réal Vallée, Louis-Charles Michaud   +3 more
core   +1 more source

Recent Advances in Transparent Microelectrode Device Architecture and Fabrication Strategies for Biomedical Applications

Advanced Materials Technologies, EarlyView.
Transparent microelectrode arrays enable simultaneous optical and electrical electrophysiology with high spatiotemporal resolution, allowing multimodal observations of dynamic biological systems. Advances in materials and device architectures improve device performance by addressing key trade‐offs between optical transparency, impedance, and ...
Michael Abraham Listyawan, Tran Bach Dang, Chi Cong Nguyen, Yee Lap Pong, Tianruo Guo, Thanh Nho Do, Hoang‐Phuong Phan   +6 more
wiley   +1 more source

Efficient, Compact Mid-Infrared Sources: A Systematic Study of Intracavity Difference-Frequency Generation

This study presents a compact intracavity difference-frequency generation (DFG) source designed for mid-infrared (mid-IR) applications. By optimizing overlap between the pump and signal beams, we obtained a black-box efficiency (ηBB) of 3.4% W⁻ ...
Daniel Poitras, Alex Chiasson, Tyler Kashak, Chang-Qing Xu, Liam G. K. Flannigan, Saeed Salimian Rizi   +5 more
core   +1 more source

Conductive Tin Oxide Under the Thermal Budget of Perovskite/TOPCon Tandems: Toward Indium‐Free Contacts

Advanced Materials Technologies, EarlyView.
This work demonstrates that achieving conductive undoped SnOx contacts required careful tailoring of oxygen vacancy (VO) tuning and defect engineering. Controlling oxygen deposition pressure and low‐temperature annealing (300°C) optimizes defect stoichiometry and mitigates carrier scattering. This low thermal budget approach significantly enhances Hall
Paul Llontop, Mario Hanser, Matthew Wright, Soumyajit Maitra, Eloy J. Marcelis, Jana‐Isabelle Polzin, Martin Bivour, David C. Grinter, Pilar Ferrer, Iris C. G. van den Bosch, Christoph Baeumer, Ruy S. Bonilla, Armin Richter, Monica Morales‐Masis   +13 more
wiley   +1 more source

Synthesizing gas-filled anti-resonant hollow-core fiber Raman lines enables access to the molecular fingerprint region

Nature Communications
The synthesis of multiple narrow optical spectral lines, precisely and independently tuned across the near- to mid-infrared region, is a pivotal research area that enables selective and real-time detection of trace gas species within complex gas mixtures.
Yazhou Wang, Lujun Hong, Cuiling Zhang, Joseph Wahlen, J. E. Antonio-Lopez, Manoj K. Dasa, Abubakar I. Adamu, Rodrigo Amezcua-Correa, Christos Markos   +8 more
doaj   +1 more source

Mid-infrared spectroscopic thermotransmittance measurements in dielectric materials for thermal imaging

Applied Physics Letters
Thermal considerations affect the performance of most microsystems. Although surface techniques can give information on the thermal properties within the material or about buried heat sources and defects, mapping temperature and thermal properties in ...
C. Bourgès, S. Chevalier, J. Maire, A. Sommier, C. Pradère, S. Dilhaire   +5 more
semanticscholar   +1 more source

Dielectric Permittivity Tensor of Muscovite for Next Generation All Van Der Waals Broadband Photonic Components

Advanced Optical Materials, EarlyView.
Low‐index and low‐loss vdW muscovite represents an emerging robust dielectric platform for the creation of next‐generation all‐vdW nanophotonic architectures. Its utilization as a low‐index building‐block in all‐vdW multilayers enables extreme optical contrast when paired with MoS2, paving the way to the realization of few‐layer ultrathin DBS ...
Meri H. Hayrapetyan, Maksim L. Sargsyan, Davit A. Karakhanyan, Ani P. Khachatryan, Maria A. Levonyan, Dmitrii Litvinov, Maciej Koperski, Artsruni V. Margaryan, Makars Šiškins, Konstantin S. Novoselov, Davit A. Ghazaryan   +10 more
wiley   +1 more source