High degree of circular polarization in WS2 spiral nanostructures induced by broken symmetry

Scientific Reports
Prahalad Kanti BarmanR N Kini

Abstract

We present helicity resolved photoluminescence (PL) measurements of WS2 spiral (SPI) nanostructures. We show that very high degree of circular polarization (DCP) (~94 ± 4%) is obtained from multilayer SPI samples at room temperature upon excitation with a circularly polarized laser at a wavelength near-resonant with the A-exciton (633 nm). TEM analysis showed that these SPI nanostructures have AB stacking in which the inversion symmetry is broken, and hence this leads to very high DCP. Comparison with PL from monolayer and bi-layer WS2 samples, along with polarization resolved PL studies provide evidence for suppression of interlayer/intravalley scattering in the multilayer SPI samples.

References

Jun 19, 2012·Nature Nanotechnology·Kin Fai MakTony F Heinz
Jun 19, 2012·Nature Nanotechnology·Hualing ZengXiaodong Cui
Jul 4, 2012·Nature Nanotechnology·Kamran Behnia
Nov 8, 2012·Nature Nanotechnology·Qing Hua WangMichael S Strano
Aug 13, 2013·Nature Nanotechnology·Aaron M JonesXiaodong Xu
Jul 30, 2014·Nature Nanotechnology·R SuzukiY Iwasa
Jul 30, 2014·Proceedings of the National Academy of Sciences of the United States of America·Bairen ZhuXiaodong Cui
Sep 1, 2014·Nature Nanotechnology·Tao JiangShiwei Wu
Oct 25, 2014·Nano Letters·Liming ZhangPeidong Yang
Nov 26, 2015·Nature Communications·Wei-Ting HsuWen-Hao Chang
Jan 6, 2016·Scientific Reports·A T HanbickiB T Jonker
Mar 2, 2016·Nanoscale·Pramoda K NayakPo-Wen Chiu
Apr 27, 2016·Scientific Reports·G KioseoglouB T Jonker
Sep 3, 2016·Nature Communications·Gerd PlechingerTobias Korn
Feb 9, 2017·Journal of the American Chemical Society·Melinda J ShearerSong Jin

❮ Previous
Next ❯

Citations

Jan 11, 2020·Research : a Science Partner Journal·Luojun DuGuangyu Zhang
Jan 30, 2021·Small·Patrick J Herbert, Kenneth L Knappenberger
Aug 24, 2019·ACS Nano·Prasad V SarmaM M Shaijumon

❮ Previous
Next ❯

Methods Mentioned

BETA
atomic force microscopy
transmission electron microscopy
AFM

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.