Orientation-dependent photonic bandgaps in gold-dust weevil scales and their titania bioreplicates

• Norma Salvadores Farran,
• Limin Wang,
• Primoz Pirih and
• Bodo D. Wilts

Beilstein J. Nanotechnol. 2025, 16, 1–10, doi:10.3762/bjnano.16.1

• }-oriented domains exhibits polarization conversion, rotating the angle of linearly polarized light. The overall coloration, resulting from the reflections from many scales, is close to uniformly diffuse because of the random orientation of the domains. Using titania sol–gel chemistry, we produced negative

• customizable photonic bandgaps that might be used in novel optical materials. Keywords: animal coloration; photonic crystal; polarization conversion; sol–gel replication; weevil; Introduction Animal coloration is produced by means of absorption, scattering, luminescence, and interference. The latter is

• . The domains in lattice orientation {100} exhibited polarization conversion. The structure inferred from optical measurements was confirmed using conventional and focused ion beam scanning electron microscopy (FIB-SEM). By averaging the reciprocal space images obtained from different lattice

A super-oscillatory step-zoom metalens for visible light

• Yi Zhou,
• Chao Yan,
• Peng Tian,
• Zhu Li,
• Yu He,
• Bin Fan,
• Zhiyong Wang,
• Yao Deng and
• Dongliang Tang

Beilstein J. Nanotechnol. 2022, 13, 1220–1227, doi:10.3762/bjnano.13.101

• . The field modulation of the unit cells with various orientations and sizes were numerically simulated by CST Microwave Studio. After a parameter sweep, as illustrated in Figure 3a, the unit cell was selected to obtain high polarization conversion efficiency with length L = 200 nm, width W = 80 nm

• light. As we used a double-layer metasurface based on the geometric phase principle, there are two polarization conversions. For the ideal case, the incident LCP will be converted to RCP, and then converted to LCP again. However, the polarization conversion efficiency cannot reach 100%, which would

Hole-mask colloidal nanolithography combined with tilted-angle-rotation evaporation: A versatile method for fabrication of low-cost and large-area complex plasmonic nanostructures and metamaterials

• Jun Zhao,
• Bettina Frank,
• Frank Neubrech,
• Chunjie Zhang,
• Paul V. Braun and
• Harald Giessen

Beilstein J. Nanotechnol. 2014, 5, 577–586, doi:10.3762/bjnano.5.68

• as possible elliptical birefringence, which is associated with polarization conversion of our structures [1]. Afterwards, we show another fabricated chiral structure with a 3D oligomer shape, which consists of three gold disks in the first layer that are arranged in an L-shaped pattern, followed by a

• biaxiality of our sample. Therefore, contributions of polarization conversion to the measured ΔTRCP-LCP spectra are expected. According to this, we use the calculation introduced in references [1][17] to obtain the real chiral response: We measure the transmittance difference ΔTRCP-LCP of our sample with