Results 191 to 200 of about 99,563 (273)

A Dual‐Emissive DNA‐Templated Silver Nanocluster with Near‐Infrared I and II Emission

Advanced Optical Materials, Volume 13, Issue 8, March 13, 2025.
This study presents a dual‐emissive DNA‐stabilized silver nanocluster with a nanosecond‐lived NIR‐I emission band and a microsecond‐lived NIR‐II emission band. Mass spectrometry establishes that the nanocluster has molecular formula (DNA)2[Ag17]11+. DNA sequence variations reveal critical nucleobases for stabilization, and modifications at the DNA 5 ...
Anna Gonzàlez‐Rosell, Vanessa Rück, Mikkel B. Liisberg, Cecilia Cerretani, Villads R. M. Nielsen, Tom Vosch, Stacy M. Copp   +6 more
wiley   +1 more source

Observation of Laser Cooling on an Electric‐Dipole‐Allowed Transition in Cr3+:LiSAF Crystal

Advanced Optical Materials, EarlyView.
In this work, an electric dipole allowed transition in Cr3+:LiSAF crystals is investigated for the purpose of optical refrigeration. A cooling efficiency approaching 10% is experimentally determined using a mode‐mismatched dual‐beam thermal lens method with 1 µm excitation in an unoriented 1% Cr3+:LiSAF sample.
Junior Reis Silva, Luis Humberto da Cunha Andrade, Sandro Marcio Lima, Antônio Carlos Bento, Tomaz Catunda, Stephen Colby Rand   +5 more
wiley   +1 more source

Driving Micro‐Objects Using Optical Force due to Fluorescence Emission From Molecules

Advanced Optical Materials, EarlyView.
Emission of fluorescence from a micro‐object in a specific direction is expected to generate an optical force driving the object in the opposite direction of the emission, like a rocket. To demonstrate this ‘photon‐driven micro‐rocket’, we prepared dye‐doped polymer micro‐object (PMO) one surface of which was covered with metallic film; the PMO ...
Syoji Ito, Takayuki Nanno, Takahiro Kaji, Mamoru Tamura, Takuya Iida, Hiroshi Miyasaka   +5 more
wiley   +1 more source

Self‐Assembled Physical Unclonable Function Labels Based on Plasmonic Coupling

Advanced Optical Materials, EarlyView.
This article introduces advanced anti‐counterfeit labels crafted through DNA‐guided self‐assembly of plasmonic nanoparticles. Utilizing nanosphere lithography for dense and precise nanoparticle placement, these labels feature unique, unclonable optical signatures achieved through plasmonic coupling, detectable by an economical 3D‐printed dark field ...
Mihir Dass, Lena Raab, Christoph Pauer, Christoph Sikeler, Larissa Heinze, Joe Tavacoli, Irina V. Martynenko, Ulrich Rührmair, Gregor Posnjak, Tim Liedl   +9 more
wiley   +1 more source

Directional Whispering Gallery Mode in Microring Lasers Enabled by Tilted Azimuthal Gratings

Advanced Photonics Research, EarlyView.
The chiral light propagation in microring lasers with active cladding, enabled by tilted azimuthal gratings, is illustrated. The symmetry of the whispering gallery mode is disrupted due to scattering losses that are determined by the tilted angle, resulting in distinct clockwise and counterclockwise light propagation, and enabling controlled chirality ...
Jinghan Chen, Adrian Abazi, Frederik van Schoonhoven, Yuji Oki, Yohei Yamamoto, Carsten Schuck, Hiroaki Yoshioka   +6 more
wiley   +1 more source

Mitigating Losses in Hyperbolic Asymptotic Eigenmodes

Advanced Photonics Research, EarlyView.
Herein, hyperbolic asymptotic eigenmodes, high‐k modes aligned with asymptotic directions in hyperbolic metamaterials, are introduced. By tuning permittivity tensors to balance loss compensation (Re(ε∥)/Re(ε⊥)=Im(ε∥)/Im(ε⊥))$\left(\right. \text{Re} \left(\right. \left(\epsilon\right)_{\parallel} \left.\right) / \text{Re} \left(\right.
Lu Song, Huaping Wang, Yingjie Wu, Tong Cai, Jiangang Liang, Lian Shen   +5 more
wiley   +1 more source

Single and Bi‐Layer Glass‐Based Phantoms: Robust Materials for a Calibration Standard for Fluorescence Imaging Systems

Advanced Photonics Research, EarlyView.
Fluorescence‐guided surgery is a common technique and characterizing imaging performance is important to ensure clinical reliability. A calibration standard comprising multiple glass phantoms fabricated to mimic the optical properties of fluorescent and non‐fluorescent tissue is presented.
Mingze Yang, Yunle Wei, Philipp Reineck, Adam J. Wells, Heike Ebendorff‐Heidepriem, Jiawen Li, Robert A. McLaughlin   +6 more
wiley   +1 more source

Theory of polarized fluorescence and absorption in molecular complexes comprising two chromophores with non-parallel absorption and emission transition dipole moments [PDF]

, 2002
Andrews, David L., Demidov, Andrey A.
core   +1 more source

Programmable Wide‐Spectrum Complex Microcavity Laser Controlled by Liquid Crystal Elastomer Braking Mechanism

Advanced Photonics Research, EarlyView.
A nematic liquid crystal elastomer (LCE) exhibiting dynamic laser oscillation behavior modulated by mechanical stretching and contraction is synthesized. This study investigates the influence of liquid crystal elastomer deformation characteristics on multidimensional complex microcavity laser systems.
Hongyang Zhu, Bingquan Zhao, Zhen He, Junxin Wei, Chensha Li   +4 more
wiley   +1 more source

Selective Co‐Assembly of Water‐Soluble Conjugated Polyelectrolyte with Discernable Fluorescence Modulation for Antibiotic Detection

Advanced Sensor Research, EarlyView.
PQx‐Ph, a water‐soluble conjugated polyelectrolyte, enables rapid and selective fluorescence‐based detection of structurally distinct antibiotics via supramolecular assembly modulation. It achieves nanomolar sensitivity under mild conditions and preserves reliable sensing performance across NOM‐rich and biologically relevant water matrices, supporting ...
Hyena Ji, Yesica Fernanda Florez‐Villabona, Youngsun Kim, Yerim Kim, Yongju Kim, Seungyun Baik, Young Hun Seo, Sehoon Kim   +7 more
wiley   +1 more source