Wiley Online Library : Advanced Optical Materials
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Ultrafast Shift Current in SnS2 Single Crystals: Structure Considerations, Modeling, and THz Emission Spectroscopy

Above-band gap optical excitation of non-centrosymmetric semiconductors can lead to the spatial shift of the center of electron charge in a process known as shift current. Shift current in single-crystal tin disulfide (SnS2), a layered semiconductor with the band gap of ≈2.3 eV, is investigated by terahertz emission spectroscopy and first principles...

Sun Apr 14, 2024 11:49
Topological Phase Singularities in Light Reflection from Non‐Hermitian Uniaxial Media

The common wisdom states that absorption violates perfect transmission of light at the Brewster angle. This paper examines the possibility to recover perfect transmission into absorbing dielectrics with uniaxial anisotropy, analyzes the behavior of the accompanying phase singularities, and illustrates the feasibility of this phenomenon with available...

Sun Apr 14, 2024 11:49
Near‐Infrared Light Trapping and Avalanche Multiplication in Silicon Epitaxial Microcrystals

The low-energy plasma-enhanced chemical vapor deposition growth of silicon on a patterned substrate results in 3D microcrystals with inclined top facets and a high aspect ratio. When illuminated, such geometry enhances light trapping and improves NIR performance of photodetectors. Indeed, up to six times higher responsivity (compared to an equivalent...

Sun Apr 14, 2024 11:49
High‐Permittivity Polysiloxanes for Bright, Stretchable Electroluminescent Devices

A high-permittivity, nitrile-functional silicone elastomer for application in stretchable electroluminescent devices is introduced. The polar elastomer emissive layer reaches significantly higher luminance and needs lower operating voltages than an emissive layer based on commercially available PDMS. Besides, the polar elastomer can be used to build...

Fri Apr 12, 2024 11:38
Wavelength‐Linearly‐Dependent and Polarization‐Sensitive Perfect Absorbers based on Optically Anisotropic Germanium Selenide (GeSe)

The wavelength-linearly-dependent and polarization-sensitive perfect absorbers made by the optically anisotropic GeSe-based and low-cost optical thin film are designed and fabricated. The near-infrared operating wavelength can be modulated not only almost linearly by the thickness of the GeSe layer but also dynamically and finely by the polarization...

Fri Apr 12, 2024 11:38
Formation of Highly Tunable Periodic Plasmonic Structures on Gold Films Using Direct Laser Writing

Direct laser writing is implemented to produce periodic energy-dependent structures on thin gold films of varying thickness. The morphological changes with pulse energy, film thickness, and grating period are investigated and the beam overlapping effect is discussed in detail. The latter parameters provide an additional degree of freedom for tuning...

Fri Apr 12, 2024 11:38

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