Toward See‐Through Optoelectronics: Transparent Light‐Emitting Diodes and Solar Cells

Transparent optoelectronic devices are the most promising technologies for see‐through display and building‐integrated photovoltaics. This review provides a comprehensive report of recent progress for transparent organic/quantum‐dot/perovskite light‐emitting diodes and dye‐sensitized/organic/perovskite solar cells. Transparent conducting electrodes...

4h

A Knotted Metamolecule with Axisymmetric Strong Optical Activity

A knotted chiral metamolecule is introduced here that exhibits strong optical activity corresponding to a 90° polarization rotation of the incident waves. Moreover, arising from the continuous multifold rotational symmetry of the chiral torus knot structure, the observed polarization rotation behavior is found to be independent of how the incident wave...

4h

Self‐Erasable and Rewritable Optoexcitonic Platform for Antitamper Hardware

A self‐erasable and rewritable optoexcitonic platform is demonstrated based on strain engineering of WSe2 monolayer. By utilizing underlying photoactivated organic molecules, large (>1%) strain is generated that results in dramatic shift in photoluminescence. Such reversible spectral shift has promising applications in self‐destructible data and...

1d

Helicity‐Preserving Metasurfaces for Magneto‐Optical Enhancement in Ferromagnetic [Pt/Co]N Films

Future high‐density and low‐power all‐optical magnetic recording will require methods to precisely sculpt electromagnetic fields in magnetic materials. It is shown that dielectric metasurfaces can enhance light–matter interactions in ferromagnetic [Pt/Co] N films. Increased local electric field strength and rotation within the ferromagnetic film...

1d

Experimental Observation of Intrinsic Light Localization in Photonic Icosahedral Quasicrystals

Light localization in defect‐free icosahedral quasicrystals has recently been predicted theoretically without experimental verification. Here, the fabrication of submicron‐size dielectric icosahedral quasicrystals is reported and the first direct experimental observation of intrinsic light localization in defect‐free quasicrystals is presented. This...

2d

Photolithographic Fabrication of Upconversion Barcodes for Multiplexed Molecular Detection

Upconversion nanoparticle loaded graphical color microbarcodes are produced via a low‐cost, high throughput photolithography process. The color segmented layer barcodes (15 µm) permit permutations of more than a thousand unique code forms, along with convenient surface bioconjugation for multiplexed biomolecular recognition. The resultant suspension...

2d

High‐Speed Transmission Control in Gate‐Tunable Metasurfaces Using Hybrid Plasmonic Waveguide Mode

An electrically tunable metasurface in the near‐infrared wavelength region with high switching speed is demonstrated. Transmittance is controlled by gate‐tunable optical permittivity modulation in the epsilon‐near‐zero region. The hybridization of the fundamental mode of a Si waveguide with the surface plasmon polaritons of a dielectric–metal interface...

2d

Tunable Infrared Plasmon Response of Lithographic Sn‐doped Indium Oxide Nanostructures

This study uses standard nanofabrication techniques to create plasmonic structures of a widely used thin film semiconductor material, Sn‐doped indium oxide (ITO). Through electron microscopy and optical characterization, the tunability of these structures is demonstrated by altering the crystallinity through high‐temperature annealing. The ease of modifying...

2d

Flexible Near‐Infrared InGaSb Nanowire Array Detectors with Ultrafast Photoconductive Response Below 20 µs

Highly crystalline InGaSb nanowires are grown and assembled into high‐density regular nanowire parallel arrays on polyimide substrates. Once fabricated into flexible photodetectors without using any p–n junctions, they exhibit record high performance with the ultra‐fast photoconductive response speed below 20 µs toward 1550 nm irradiation at room temperature....

2d

Benzodithienyl Silanes for Organic Electronics: AIE Solid‐State Blue Emitters and High Triplet Energy Charge‐Transport Materials

Bis‐benzodithienyl silanes are inherently 3D frameworks owing to the tetrahedral geometry of the Si atom. In this paper, three novel structures are prepared and fully characterized; the parent silane, which displays efficient deep‐blue luminescence in solid state, is demonstrated to be an effective, nitrogen‐free, host material for blue and green vacuum‐processed...

2d