Advanced Optical Materials最新文献

The image illustrates the influence of group delay dispersion (GDD) on optical pulses, highlighting the chromatic dispersion and chirp that arise upon interaction with a mirror. In the Research Article (DOI: 10.1002/adom.202500727), Ulrich Galander, Oliver H. Heckl, and co-workers characterize the GDD of supermirrors designed for the mid-infrared spectral regime.

Suspended Black Phosphorus

The anisotropic suspended black phosphorus (BP) on the right exhibits an elliptical Raman mapping, while the isotropic suspended MoS₂ on the left displays a circular one. The elliptical Raman mapping has been confirmed to correlate with the crystal orientation of BP, which provides a new method for determining the crystal orientation of BP. For suspended BP-based photodetectors, the responsivity (R) reaches ≈1 A W⁻¹ at 1064 nm in the armchair direction, surpassing supported BP photodetectors by 49% in R, 89% in response time, and 45% in recovery time. More details can be found in the Research Article by Chao Wang, Jinlai Zhao, and co-workers (Doi: 10.1002/adom.202502057).

Light as a Butterfly

Forward light scattering transmits light without backward reflection. Such a property can be achieved from certain core-shell nanostructures. Here, we can imagine particle assemblies, where each particle's color is determined by its diameter. Light is scattered forward, where objects appear dark for certain observation angles, because there is zero backward reflected light. More details can be found in the Research Article by Lucien Roach, Peter Wiecha, Glenna L. Drisko, and co-workers (DOI: 10.1002/adom.202502529).

Organic Magnetic Field Effects

The cover image depicts the synergy between theory and experiment in studying spin dynamics of cyanoarene-based TADF materials discussed in the Research Article Christian Wiebeler, Georgeta Salvan, and co-workers (DOI: 10.1002/adom.202501504). The magnet and OLED symbolize the organic magnetic field effect studies used to assess the spin dynamics, while the background illustrates the support provided by quantum chemical calculations.

Thermal Metamaterials for Aerospace Applications

The cover artwork illustrates the function of thermal dual barrier coatings: suppressing both radiative and conductive heat transfer at extreme temperatures (>1200 °C). The images depict the metamaterial layer protecting structural alloys under intense hot–cold thermal gradients. More details can be found in the Research Article by Zubin Jacob and co-workers (DOI: 10.1002/adom.202501827).

Meta Optics

High optical stability of directly nanoimprinted metalens arrays was demonstrated using femtosecond high-energy laser pulses with an exposure time over 3 hours. Unlike an earlier failure of TiO₂ nanoparticle-polymer composite metalenses at a much lower fluence (< 8 mJ/cm²), the all-inorganic TiO₂ metalenses remained intact (> 64 mJ/cm²) and maintained high focusing efficiency. More details can be found in the Research Article by James J. Watkins and co-workers (DOI: 10.1002/adom.202501769).

Transition Dipole Moments

Fourier-plane imaging microscopy enables simultaneous determination of transition dipole moment orientation and refractive index in morphologically non-uniform nanoscale films, providing a powerful tool for advancing various LEDs and nanophotonic device design. More details can be found in the Research Article by Namyoung Ahn, Kyusang Lee, Jongchan Kim, and co-workers (DOI: 10.1002/adom.202502019).

Compact Pixel Architecture via ACEL

The frontispiece shows a frequency-modulated, AC-driven quantum-dot electroluminescent pixel comprising tandem RGB stacks separated by a charge-buffer layer. Varying the drive frequency redistributes charge between the top and bottom stacks to yield smooth, reversible color tuning. This compact architecture approaches the DCI-P3 color gamut and simplifies full-color, ultra-high-resolution displays. More details can be found in the Research Article by, as reported by Shuai Chang and co-workers (DOI: 10.1002/adom.202502689).

Chiral Gold Nanopropellers

The cover features chirally twisted gold “nanopropellers” functionalized with cysteine that couple plasmonic chirality with stereospecific molecular recognition, enabling enantioselective surface-enhanced Raman spectroscopy (SERS) of amino acids. Control experiments, density functional theory (DFT), and finite-difference time-domain (FDTD) simulations confirm a dual mechanism in which handed near-fields amplify selective adsorption, yielding highly sensitive and selective chiral light–matter interactions. More details can be found in the Research Article by Xiao You and co-workers (DOI: 10.1002/adom.202501589).

Laser-Engineered Thermal Metamaterial Platforms

In the Research Article (DOI: 10.1002/adom.202502035), Ufuk Kilic, Mohammad Ghashami, and co-workers present a metamaterial platform based on femtosecond laser surface processing (FLSP) of titanium surfaces. By tuning laser fluence and pulse count, self-organized Ti–TiO_x core–shell mound structures are generated, whose emissivity can be precisely tailored by structural parameters. Combining Mueller matrix spectroscopic ellipsometry and finite element modeling, the study reveals how the engineered structures govern near- and far-field characteristics, activating plasmonic and interband resonance modes across UV to mid-IR wavelengths.