scholarly journals Direct detection of circular polarized light in helical 1D perovskite-based photodiode

2020 ◽  
Vol 6 (46) ◽  
pp. eabd3274
Author(s):  
A. Ishii ◽  
T. Miyasaka
Keyword(s):  
Direct Detection ◽  
Polarized Light ◽  
Organic Cations ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
One Dimensional ◽  
Left Handed ◽  
Plasmonic Metamaterials ◽  
Halide Perovskites ◽  
Lead Halide

Detection of circularly polarized light (CPL) has a high potential for development of various optical technologies. Conventional photodetectors require optical polarizers on the device to detect polarized light, and this causes substantial losses of sensitivity and resolution in light detection. Here, we report direct CPL detection by a photodiode using a helical one-dimensional (1D) structure of lead halide perovskites composed of naphthylethylamine-based chiral organic cations. The 1D structure with face-sharing (PbI6)4− octahedral chains whose helicity is largely affected by chiral cations shows intense circular dichroism (CD) signals over 3000 mdeg at 395 nm with the highly anisotropy factor (gCD) of 0.04. This high CD enables photocurrent detection with effective discrimination between left-handed and right-handed CPLs. The CPL detector based on this 1D perovskite achieved the highest polarization discrimination ratio of 25.4, which largely surpasses the direct detecting CPL devices (<4) using chiral plasmonic metamaterials and organic materials.

Homochiral One-Dimensional ABX3 Lead Halide Perovskites with High-Tc Quadratic Nonlinear Optical and Dielectric Switchings

2021 ◽  
Author(s):  
Hang Peng ◽  
Yu-Hua Liu ◽  
Xue-Qin Huang ◽  
Qin Liu ◽  
Zi-Hong Yu ◽  
...  
Keyword(s):  
Nonlinear Optical ◽  
Polarized Light ◽  
High Tc ◽  
Inorganic Hybrid ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
One Dimensional ◽  
Nonvolatile Memories ◽  
Halide Perovskites ◽  
Lead Halide

Chiral organic-inorganic hybrid lead-halide perovskites have attracted increasing attention for their wide applications prospect in chiroptoelectronics, such as circularly polarized light (CPL) photodetectors and LEDs, nonvolatile memories, and spintronics, etc....

scholarly journals Circularly polarized light detection with hot electrons in chiral plasmonic metamaterials

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Wei Li ◽  
Zachary J. Coppens ◽  
Lucas V. Besteiro ◽  
Wenyi Wang ◽  
Alexander O. Govorov ◽  
...  
Keyword(s):  
Polarized Light ◽  
Hot Electrons ◽  
Light Detection ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Plasmonic Metamaterials

Circularly Polarized Light Detection with Hot Electrons in Chiral Plasmonic Metamaterials

2015 ◽  
Author(s):  
Wei Li ◽  
Zachary J. Coppens ◽  
Lucas Vázquez ◽  
Wenyi Wang ◽  
Alexander O. Govorov ◽  
...  
Keyword(s):  
Polarized Light ◽  
Hot Electrons ◽  
Light Detection ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Plasmonic Metamaterials

scholarly journals Circularly Polarized Light Detection by Chiral Photonic Cellulose Nanocrystal with ZnO Photoconductive Layer in Ultraviolet Region

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 3098
Author(s):  
Boyu Zhang ◽  
Sixiang Zhao ◽  
Yingying Yu ◽  
Ming Li ◽  
Liancheng Zhao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Polarization State ◽  
Polarized Light ◽  
Cellulose Nanocrystal ◽  
Ultraviolet Region ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Handed ◽  
Chiral Nematic ◽  
Wide Range

Circularly polarized light (CPL) detection and polarization state recognition are required for a wide range of applications. Conventional polarization detection with optical components causes difficulties for miniaturization and integration. An effective design strategy is proposed for direct CPL detection with chiral material. Here, we realized direct CPL detection based on the combination of chiral photonic cellulose nanocrystal (CNC) and ultraviolet-sensitive ZnO photoconductive material. The CNC layer deposited by evaporation-induced self-assembly established the left-handed chiral nematic structure with a photonic bandgap (PBG) to recognize left-handed CPL (LCPL) and right-handed CPL (RCPL) at specific wavelengths. The PBG of CNC layer has been modulated by the adjustment of chiral nematic pitch to match the semiconductor bandgap of ZnO film in ultraviolet region. The photocurrents under RCPL and LCPL are 2.23 × 10−6 A and 1.77 × 10−6 A respectively and the anisotropy factor Δgpc of 0.23 is acquired for the CPL detection based on the chiral photonic CNC. This design provides a new approach to the detection of CPL polarization state with competitive performance.

scholarly journals Analysis of ellipsometric parameters in the reflection of circularly polarized light from a thin anisotropic plate

2021 ◽  
Vol 2094 (2) ◽  
pp. 022071
Author(s):  
V V Yatsyshen
Keyword(s):  
Anisotropic Plate ◽  
Plate Boundary ◽  
Polarized Light ◽  
High Sensitivity ◽  
Incident Radiation ◽  
Angle Of Incidence ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Handed ◽  
Reflected Light

Abstract The article presents the results of the analysis of the angular spectra of the ellipsometric parameters of the reflected wave when a circularly polarized light wave is incident on an anisotropic plate. The given dependences show a very high sensitivity of the ellipsometric parameters of the reflected light on the angle of incidence and the angle between the optical axis and the normal to the plate boundary. The energy reflection spectra themselves show much less variability when these parameters change. It should be especially emphasized the nature of the change in the ellipsometric angle Δ, which is responsible for the type of elliptical polarization - when Δ> 0, the polarization is left-handed, and when Δ <0, it is right-handed. It is shown that a thin anisotropic plate at certain angles can serve as a polarization converter of the incident radiation. The ellipsometry parameter ρ characterizes the degree of compression of the ellipse - when ρ = 1, the ellipse is transformed into a circle, and the light is circularly polarized in this case. Thus, a thin anisotropic plate can not only convert left-handed polarization to right-handed, but it can also control the very shape of the polarization ellipse. Such a plate can be used in conjunction with a layered medium, for example, a one-dimensional photonic crystal, to control the polarization of the incident circularly polarized light.

scholarly journals An orbital energy flow and a spin flow at the tight focus

2021 ◽  
Vol 45 (4) ◽  
pp. 520-524
Author(s):  
S.S. Stafeev
Keyword(s):  
Energy Flow ◽  
Optical Axis ◽  
Polarized Light ◽  
Orbital Energy ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Left Hand ◽  
Left Handed ◽  
Sharp Focus ◽  
Positive Projection

We have shown that a reverse energy flow (negative projection of the Poynting vector onto the optical axis) at the sharp focus of an optical vortex with topological charge 2 and left-hand circular polarization arises because the axial spin flow has a negative projection onto the optical axis and is greater in magnitude than positive projection onto the optical axis of the orbital energy flow (canonical energy flow). Also, using the Richards-Wolf formulas, it is shown that when focusing a left-handed circularly polarized light, in the region of the on-axis reverse energy flow, the light is right-handed circularly polarized.

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