Au nanochiral structures with selective circular polarized light absorption in the visible region

2020 ◽  
Vol 2020.11 (0) ◽  
pp. 26P3-MN2-5
Author(s):  
Gaku FURUSAWA ◽  
Takashi SEKIYA ◽  
Hiroaki NAKAMURA ◽  
Tetsuo KAN
Keyword(s):  
Light Absorption ◽  
Visible Region ◽  
Polarized Light ◽  
Circular Polarized Light

scholarly journals High-Efficiency, Dual-Band Beam Splitter Based on an All-Dielectric Quasi-Continuous Metasurface

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3184
Author(s):  
Jing Li ◽  
Yonggang He ◽  
Han Ye ◽  
Tiesheng Wu ◽  
Yumin Liu ◽  
...  
Keyword(s):  
Wavelength Range ◽  
Conversion Efficiency ◽  
Antenna Arrays ◽  
Beam Splitter ◽  
High Efficiency ◽  
Visible Region ◽  
Polarized Light ◽  
Dual Band ◽  
Phase Gradient ◽  
Total Transmission

Metasurface-based beam splitters attracted huge interest for their superior properties compared with conventional ones made of bulk materials. The previously reported designs adopted discrete metasurfaces with the limitation of a discontinuous phase profile. In this paper, we propose a dual-band beam splitter, based on an anisotropic quasi-continuous metasurface, by exploring the optical responses under x-polarized (with an electric field parallel to the direction of the phase gradient) and y-polarized incidences. The adopted metasurface consists of two identical trapezoidal silicon antenna arrays with opposite spatial variations that lead to opposite phase gradients. The operational window of the proposed beam splitter falls in the infrared and visible region, respectively, for x- and y-polarized light, resulting from the different mechanisms. When x-polarized light is incident, the conversion efficiency and total transmission of the beam splitter remains higher than 90% and 0.74 within the wavelength range from 969 nm to 1054 nm, respectively. In this condition, each array can act as a beam splitter of unequal power. For y-polarized incidence, the maximum conversion efficiency and transmission reach approximately 100% and 0.85, while the values remain higher than 90% and 0.65 in the wavelength range from 687 nm to 710 nm, respectively. In this case, each array can be viewed as an effective beam deflector. We anticipate that it can play a key role in future integrated optical devices.

scholarly journals Dynamic Control and Amplification of Molecular Chirality by Circular Polarized Light

Science ◽  
1996 ◽  
Vol 273 (5282) ◽  
pp. 1686-1688 ◽  
Author(s):  
N. P. M. Huck ◽  
W. F. Jager ◽  
B. de Lange ◽  
B. L. Feringa
Keyword(s):  
Dynamic Control ◽  
Polarized Light ◽  
Molecular Chirality ◽  
Circular Polarized Light

Linearly polarized light absorption spectra of chlorosomes, light-harvesting antennas of photosynthetic green sulfur bacteria

2010 ◽  
Vol 484 (4-6) ◽  
pp. 333-337 ◽  
Author(s):  
Hitoshi Tamiaki ◽  
Shingo Tateishi ◽  
Shosuke Nakabayashi ◽  
Yutaka Shibata ◽  
Shigeru Itoh
Keyword(s):  
Absorption Spectra ◽  
Light Absorption ◽  
Light Harvesting ◽  
Polarized Light ◽  
Green Sulfur Bacteria ◽  
Sulfur Bacteria ◽  
Linearly Polarized ◽  
Green Sulfur

scholarly journals Donor Acceptor Copolymers from Cyclopentannulation Polymerizations with Dicyclopenta[cd,jk]pyrene and Dicyclopenta[cd,lm]perylene Acceptors

2020 ◽  
Author(s):  
Ain Uddin ◽  
Kyle Plunkett
Keyword(s):  
Thin Film ◽  
Cyclic Voltammetry ◽  
Light Absorption ◽  
Visible Region ◽  
Optoelectronic Properties ◽  
Band Gaps ◽  
Molecular Weights ◽  
Palladium Catalyzed ◽  
Donor Acceptor ◽  
Film Absorption

A series of donor-acceptor copolymers with dicyclopenta[cd,jk]pyrene and dicyclopenta[cd,lm]perylene acceptor units was prepared via palladium catalyzed cyclopenta-annulation reactions. The acceptor units were paired with diethynyl containing donor groups based on benzo[1,2-b:4,5-b']dithiophene, thieno[3,2-b]thiophene, and 4-octyl-4H-dithieno[3,2-b:2',3'-d]pyrrole to create six polymer variants. The cyclopentannulation polymerization resulted in copolymers with molecular weights (Mn) of 6-14 kDa and broad light absorption in the visible region with band gaps of 1.38-1.85 eV. The synthetic methodology, as well as optoelectronic properties, including thin-film absorption and cyclic voltammetry, of the donor-acceptor copolymers are presented.<br> <br><br>

Organic photodiodes from homochiral l-proline derived squaraine compounds with strong circular dichroism

2017 ◽  
Vol 19 (10) ◽  
pp. 6996-7008 ◽  
Author(s):  
Matthias Schulz ◽  
Majvor Mack ◽  
Oliver Kolloge ◽  
Arne Lützen ◽  
Manuela Schiek
Keyword(s):  
Circular Dichroism ◽  
Polarized Light ◽  
Active Layers ◽  
Circular Dichroïsm ◽  
Circular Dichroic ◽  
Circular Polarized Light

We demonstrate the feasibility of inserting highly circular dichroic active layers into an organic photodiode as a potential detector for circular polarized light.

Sign in / Sign up

Export Citation Format

Share Document