scholarly journals Black Phosphorus Nano-Polarizer with High Extinction Ratio in Visible and Near-Infrared Regime

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 168 ◽  
Author(s):  
Wanfu Shen ◽  
Chunguang Hu ◽  
Shuchun Huo ◽  
Zhaoyang Sun ◽  
Guofang Fan ◽  
...  
Keyword(s):  
Near Infrared ◽  
Functional Module ◽  
Extinction Ratio ◽  
Scattering Matrix ◽  
Black Phosphorus ◽  
Practical Applications ◽  
High Extinction Ratio ◽  
Linear Polarizer ◽  
Resonance Cavity ◽  
Matrix Calculation

We study computationally the design of a high extinction ratio nano polarizer based on black phosphorus (BP). A scattering-matrix calculation method is applied to compute the overall polarization extinction ratio along two orthogonal directions. The results reveal that, with a resonance cavity of SiO2, both BP/ SiO 2 /Si and h-BN/BP/ SiO 2 /Si configurations can build a linear polarizer with extinction ratio higher than 16 dB at a polarized wavelength in the range of 400 nm–900 nm. The polarization wavelength is tunable by adjusting the thickness of the BP layer while the thicknesses of the isotrocpic layers are in charge of extinction ratios. The additional top layer of h-BN was used to prevent BP degradation from oxidation and strengthens the practical applications of BP polarizer. The study shows that the BP/ SiO 2 /Si structure, with a silicon compatible and easy-to-realize method, is a valuable solution when designing polarization functional module in integrated photonics and optical communications circuits.

scholarly journals Wide-angle near infrared polarizer with extremely high extinction ratio

2013 ◽  
Vol 21 (9) ◽  
pp. 10502 ◽  
Author(s):  
X. L. Liu ◽  
B. Zhao ◽  
Z. M. Zhang
Keyword(s):  
Near Infrared ◽  
Extinction Ratio ◽  
Wide Angle ◽  
High Extinction Ratio

scholarly journals A high extinction ratio plasmonic SU-8 waveguide polarizer

2021 ◽  
Vol 487 ◽  
pp. 126798
Author(s):  
Peyman Malekzadeh ◽  
Gholam-Mohammad Parsanasab ◽  
Hamed Nikbakht ◽  
Ezeddin Mohajerani ◽  
Majid Taghavi ◽  
...  
Keyword(s):  
Extinction Ratio ◽  
High Extinction Ratio

High extinction‐ratio microstructure fiber based on chalcogenide glasses

2021 ◽  
Author(s):  
Tiesong Xu ◽  
Minghui Zhong ◽  
Xiaolin Liang ◽  
Jia Liu ◽  
Bin Yan ◽  
...  
Keyword(s):  
Chalcogenide Glasses ◽  
Extinction Ratio ◽  
High Extinction Ratio ◽  
Microstructure Fiber

scholarly journals Au–ZnO Conjugated Black Phosphorus as a Near-Infrared Light-Triggering and Recurrence-Suppressing Nanoantibiotic Platform against Staphylococcus aureus

Pharmaceutics ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 52
Author(s):  
Atanu Naskar ◽  
Sohee Lee ◽  
Kwang-sun Kim
Keyword(s):  
Staphylococcus Aureus ◽  
Bacterial Infections ◽  
Near Infrared ◽  
Au Nanoparticles ◽  
Synthesis Method ◽  
Antibacterial Properties ◽  
Black Phosphorus ◽  
Infrared Light ◽  
Resistant Bacteria ◽  
Near Infrared Light

Antibiotic therapy is the gold standard for bacterial infections treatment. However, the rapid increase in multidrug-resistant (MDR) bacterial infections and its recent use for secondary bacterial infections in many COVID-19 patients has considerably weakened its treatment efficacy. These shortcomings motivated researchers to develop new antibacterial materials, such as nanoparticle-based antibacterial platform with the ability to increase the chances of killing MDR strains and prevent their drug resistance. Herein, we report a new black phosphorus (BP)-based non-damaging near-infrared light-responsive platform conjugated with ZnO and Au nanoparticles as a synergistic antibacterial agent against Staphylococcus aureus species. First, BP nanosheets containing Au nanoparticles were assembled in situ with the ZnO nanoparticles prepared by a low-temperature solution synthesis method. Subsequently, the antibacterial activities of the resulting Au–ZnO–BP nanocomposite against the non-resistant, methicillin-resistant, and erythromycin-resistant S. aureus species were determined, after its photothermal efficacy was assessed. The synthesized nanocomposite exhibited excellent anti-S. aureus activity and good photothermal characteristics. The non-resistant S. aureus species did not produce drug-resistant bacteria after the treatment of multiple consecutive passages under the pressure of the proposed nanoantibiotic, but rapidly developed resistance to erythromycin. This work clearly demonstrates the excellent photothermal antibacterial properties of Au–ZnO–BP nanocomposite against the MDR S. aureus species.

scholarly journals Dual-Wavelength, Linearly Polarized All-Fiber Laser With High Extinction Ratio

2013 ◽  
Vol 5 (4) ◽  
pp. 1501406-1501406 ◽  
Author(s):  
A. R. EL-Damak ◽  
Jianhua Chang ◽  
Jian Sun ◽  
Changqing Xu ◽  
Xijia Gu
Keyword(s):  
Fiber Laser ◽  
Extinction Ratio ◽  
Dual Wavelength ◽  
High Extinction Ratio ◽  
Linearly Polarized

scholarly journals Novel concept of the smart NIR-light–controlled drug release of black phosphorus nanostructure for cancer therapy

2018 ◽  
Vol 115 (3) ◽  
pp. 501-506 ◽  
Author(s):  
Meng Qiu ◽  
Dou Wang ◽  
Weiyuan Liang ◽  
Liping Liu ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Cancer Therapy ◽  
Drug Release ◽  
Drug Delivery System ◽  
Delivery System ◽  
Near Infrared ◽  
Black Phosphorus ◽  
Deep Penetration ◽  
Nir Light

A biodegradable drug delivery system (DDS) is one the most promising therapeutic strategies for cancer therapy. Here, we propose a unique concept of light activation of black phosphorus (BP) at hydrogel nanostructures for cancer therapy. A photosensitizer converts light into heat that softens and melts drug-loaded hydrogel-based nanostructures. Drug release rates can be accurately controlled by light intensity, exposure duration, BP concentration, and hydrogel composition. Owing to sufficiently deep penetration of near-infrared (NIR) light through tissues, our BP-based system shows high therapeutic efficacy for treatment of s.c. cancers. Importantly, our drug delivery system is completely harmless and degradable in vivo. Together, our work proposes a unique concept for precision cancer therapy by external light excitation to release cancer drugs. If these findings are successfully translated into the clinic, millions of patients with cancer will benefit from our work.

Air-stable few-layer black phosphorus phototransistor for near-infrared detection

2017 ◽  
Vol 28 (8) ◽  
pp. 085201 ◽  
Author(s):  
Junhong Na ◽  
Kichul Park ◽  
Jin Tae Kim ◽  
Won Kook Choi ◽  
Yong-Won Song
Keyword(s):  
Near Infrared ◽  
Black Phosphorus ◽  
Infrared Detection
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