Lasing action in an electrically pumped organic laser device is demonstrated with a high quality factor (Q) microcavity structure formed by two high-reflective and low-loss electrical contacts. A 4-(dicyanomethylene)-2-i-propyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran-doped tris(8-hydroxy-quinoline)aluminum (Alq(3)) film serves as the active layer. A single longitudinal lasing cavity mode is obtained at 621.7 nm with a threshold current density of 860 mA/cm(2) under a room temperature pulse operation.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1364/ol.34.000503 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Light-driven plasmonic microrobot for nanoparticle manipulation.
Nat Commun
March 2025
Nano-Optics and Biophotonics Group, Experimentelle Physik 5, Physikalisches Institut, Universität Würzburg, Am Hubland, Würzburg, Germany.
Recently light-driven microdrones have been demonstrated, making use of plasmonic nanomotors based on directional resonant chiral light scattering. These nanomotors can be addressed individually, without requiring the tracking of a focused laser, leading to exceptional 2D maneuverability which renders microdrones a versatile robotic platform in aqueous environments. Here, we incorporate a light-operated manipulator, a plasmonic nano-tweezer, into the microdrone platform, rendering it a microrobot by enabling precise, all-optical transport and delivery of single nanoparticles suspended in solution.
View Article and Find Full Text PDFLight-Reactive Norharmane Derivatization of Lipid Isomers by Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry.
Anal Chem
March 2025
Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
The lipidome, encompassing the comprehensive lipid fingerprint of a biological system, includes thousands of unique isomeric and isobaric lipid species. Mass spectrometry (MS) is an effective technique for characterizing the lipidome, although the resolution of isomeric lipid species through MS typically requires specialized or modified equipment. In this study, we introduce a novel matrix derivatization technique that leverages the unique photoreactive properties of unsaturated lipids to reveal the double-bond location in conventional matrix-assisted laser desorption-ionization mass spectrometry (MALDI-MS) experiments.
View Article and Find Full Text PDFIn this work, we reported an organic dye-doped polymer-coated optical fiber optofluidic laser (FOFL) that supports whispering gallery mode (WGM) laser emission. The dye-doped polymer was coated on the outer surface of single-mode fibers (SMFs) using a simple method to fabricate a uniform and consistent solid gain film. By using coated fibers as optical microcavities for lasers, a low lasing threshold of about 0.
View Article and Find Full Text PDFFemtosecond laser synthesis of metastable PtRu/graphene electrocatalysts for efficient hydrogen evolution reaction in acidic and alkaline solutions.
J Colloid Interface Sci
March 2025
Laser Micro/Nano-Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address:
Facile synthesis of nanoalloys with atomic dispersity is an effective means to engineer highly efficient electrocatalysts by maximizing the exposure of catalytically active sites. However, such effort faces challenges in practice. One key issue is the thermodynamic-driven phase separation because of differences in redox potentials across different elements.
View Article and Find Full Text PDFInvestigation of the Nonlinear Optical Properties of Silk Fibroin (SF) Using the Z-Scan Method.
Materials (Basel)
February 2025
Institute of Electronics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee, Blvd., 1784 Sofia, Bulgaria.
Silk fibroin (SF), the primary protein in silkworm silk, has emerged as a promising organic nonlinear optical material due to its unique combination of optical transparency, biocompatibility, and environmental sustainability. In this study, we investigate the nonlinear optical properties of SF thin films using the -scan technique with femtosecond laser pulses (35 fs, 800 nm, 1 kHz). Our results reveal a strong self-defocusing effect (negative nonlinear refractive index) and significant multiphoton absorption, demonstrating SF's tunable nonlinear response.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!