Aqueous Synthesis of Low-Dimensional Lead Halide Perovskites for Room-Temperature Circularly Polarized Light Emission and Detection

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.

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

Materials Chemistry Frontiers ◽

10.1039/d1qm00223f ◽

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....

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Design and fabrication of birefringent nano-grating structure for circularly polarized light emission

Optics Express ◽

10.1364/oe.22.007388 ◽

2014 ◽

Vol 22 (7) ◽

pp. 7388 ◽

Cited By ~ 9

Author(s):

Ming-Yi Lin ◽

Tsung-Han Tsai ◽

Yu Ling Kang ◽

Yu-Cheng Chen ◽

Yi-Hsiang Huang ◽

...

Keyword(s):

Light Emission ◽

Polarized Light ◽

Circularly Polarized Light ◽

Circularly Polarized ◽

Grating Structure

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Normal electric field enhanced light-induced polarizations and magnetic detection of valley polarization in silicene

Scientific Reports ◽

10.1038/s41598-020-73138-5 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

N. Shahabi ◽

A. Phirouznia

Keyword(s):

Electric Field ◽

Light Emission ◽

Polarized Light ◽

Spin Current ◽

Circularly Polarized Light ◽

Circularly Polarized ◽

Normal Electric Field ◽

Valley Polarization ◽

Population Imbalance ◽

Magnetic Detection

Abstract The role of staggered potential on light-induced spin and pseudo-spin polarization has been investigated in silicene. It has been shown that non-equilibrium spin and pseudo-spin polarizations are emerged in silicene sheet by applying an external perpendicular electric field in the presence of circularly polarized light emission. This electric field results in pseudo-spin resolved states very close to the Dirac points therefore could be considered as a pseudomagnetic field. It has been shown that staggered potential induced spin-valley locking and pseudo-spin resolved bands are responsible for the enhancement of the spin and pseudo-spin polarizations. Meanwhile, spin-valley locking suggests a coexistence of both spin and valley polarizations with nearly identical (or at least proportional) population imbalance at low Fermi energies which could be employed for magnetic detection of the valley polarization. It has been shown that spin-valley locking results in the protection of the spin polarizations against the relaxations in elastic scattering regime. In addition, the results indicate that the pseudo-spin current can be generated by the circularly polarized light which could be explained by asymmetric light absorption of the states in k-space.

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