A new configuration of non polarizer ‘‘guest–host’’ mode, based on the liquid crystal mixture doped with black mixtures of dichroic dyes with negative dichroism, is proposed and demonstrated for the first time. Both transmissive and reflective variants are possible with either monochromatic or black/white switching. It is shown that the contrast ratio is not limited in this case. A contrast rat...

Freshly isolated retinal photoreceptors of goldfish were studied microspectrophotometrically. Absolute absorptance spectra obtained from dark-adapted cone outer segments reaffirm the existence of three spectrally distinct cone types with absorption maxima at 455 +/- 3,530 +/- 3, and 625 +/- 5 nm. These types were found often recognizable by gross cellular morphology. Side-illuminated cone outer...

Solar-Blind Ultraviolet Photodetectors In article number 2111673, Xiaosheng Fang, Zhongming Wei, Hua Xu, and co-workers fabricate a polarization sensitive solar-blind ultraviolet photodetector based on ultrathin KNb3O8 nanobelts synthesized via chemical vapor deposition growth. The device exhibits superior photodetection performance in the region (230–280 nm) with high responsivity (30 A W−1) l...

Low-loss dichroic filters, a subgroup of frequency-selective components, have been characterized by terahertz time-domain spectroscopy in the region from 0.1 to 3 THz and with Fourier transform spectroscopy. The two data sets are fully consistent. The time-domain spectrometer is used to investigate the phase velocity behavior of dichroic filters. The dichroic filters have various applications i...

A new approach based on a conjugated polymer/block copolymer guest/host system for the generation of polarized photoluminescence is reported. Synthetic modification of a poly(p-phenylene-ethynylene) (PPE) conjugated polymer is used for domain-specific incorporation into a cylindrical morphology block copolymer host matrix. Subsequent ordering of the host nanostructure via roll cast processing t...

We describe polarizing Ž lms formed from the lyotropic liquid crystalline phases of dyes dissolved in water. The dye polarizers possess a high dichroic ratio close to that of conventional polarizers. In addition, the dried dye Ž lms provide a uniform homogeneous orientation for thermotropic nematic materials. Therefore, thin dye Ž lms can simultaneously serve as internal polarizers and as align...

A permanent magnet stepper motor is modified to hold a dichroic polarizer inside the motor. Rotation of the polarizer by 90° ± 0.04° is accomplished within 80 ms. This device is used for measurements of the intensity ratio for two orthogonal linear polarized components of a light beam. The two selected polarizations can be rapidly alternated to allow for signal drift compensation, and the two s...

Liquid crystal (LC) based photonic devices are important in light modulated applications including amplitude modulation and phase modulation. [Yang et al. (2006)] The anisotropic properties of LC result in employing two polarizers in most of LC devices. The optical efficiency (~3%) and the viewing angle are limited. Therefore, it is highly desirable to develop polarizer-free LC devices. [Yang e...

This work demonstrates a high‐performance in‐cell polarizer adopting photo‐aligned azobenzene dyes. On the strength of multilayered design, simple fabrication process has been developed to assemble an polarizer. We have achieved broadband dichroic ratio after long‐term stability test. Meanwhile, cell with proposed can be driven regularly without voltage boost, which renders excellent practicabi...