Multistate Nonvolatile Metamirrors with Tunable Optical Chirality

2021 ◽  
Author(s):  
Yijia Huang ◽  
Tianxiao Xiao ◽  
Zhengwei Xie ◽  
Jie Zheng ◽  
Yarong Su ◽  
...  
Keyword(s):  
Optical Chirality

scholarly journals Optical Chirality Determined from Mueller Matrices

2021 ◽  
Vol 11 (15) ◽  
pp. 6742
Author(s):  
Hans Arwin ◽  
Stefan Schoeche ◽  
James Hilfiker ◽  
Mattias Hartveit ◽  
Kenneth Järrendahl ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Constitutive Relations ◽  
Mueller Matrix ◽  
Optical Path ◽  
Electromagnetic Modeling ◽  
Structural Effects ◽  
Polarization Effects ◽  
Optical Chirality ◽  
Mueller Matrices ◽  
Circular Dichroïsm

Optical chirality, in terms of circular birefringence and circular dichroism, is described by its electromagnetic and magnetoelectric material tensors, and the corresponding optical activity contributes to the Mueller matrix. Here, spectroscopic ellipsometry in the spectral range 210–1690 nm is used to address chiral phenomena by measuring Mueller matrices in transmission. Three approaches to determine chirality parameters are discussed. In the first approach, applicable in the absence of linear polarization effects, circular birefringence and circular dichroism are evaluated directly from elements of a Mueller matrix. In the second method, differential decomposition is employed, which allows for the unique separation of chirality parameters from linear anisotropic parameters as well as from depolarization provided that the sample is homogeneous along the optical path. Finally, electromagnetic modeling using the Tellegen constitutive relations is presented. The last method also allows structural effects to be included. The three methods to quantify optical chirality are demonstrated for selected materials, including sugar solutions, α-quartz, liquid crystals, beetle cuticle, and films of cellulose nanocrystals.

Optical Chirality Sensing with a Stereodynamic Aluminum Biphenolate Probe

2018 ◽  
Vol 84 (8) ◽  
pp. 4639-4645 ◽  
Author(s):  
Zeus A. De los Santos ◽  
Leo A. Joyce ◽  
Edward C. Sherer ◽  
Christopher J. Welch ◽  
Christian Wolf
Keyword(s):  
Optical Chirality

scholarly journals Optical Chirality Sensing with an Auxiliary‐Free Earth‐Abundant Cobalt Probe

2019 ◽  
Vol 58 (4) ◽  
pp. 1198-1202 ◽  
Author(s):  
Zeus A. De los Santos ◽  
Ciarán C. Lynch ◽  
Christian Wolf
Keyword(s):  
Optical Chirality ◽  
Earth Abundant

Induced Optical Chirality of Porphyrin J-Aggregates with 2-Alkyl Alcohol in a Microemulsion System

2014 ◽  
Vol 43 (8) ◽  
pp. 1257-1259 ◽  
Author(s):  
Hitoshi Watarai ◽  
Fumie Hiramatsu ◽  
Hoang Trong Tien Duc ◽  
Tran Thi Ngoc Lan
Keyword(s):  
Microemulsion System ◽  
Optical Chirality ◽  
J Aggregates

Chiroptical sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids with metal salts

2019 ◽  
Vol 55 (44) ◽  
pp. 6297-6300 ◽  
Author(s):  
Ciarán C. Lynch ◽  
Zeus A. De los Santos ◽  
Christian Wolf
Keyword(s):  
Amino Acids ◽  
Carboxylic Acids ◽  
Amino Alcohols ◽  
Metal Salts ◽  
Hydroxy Acids ◽  
Optical Chirality ◽  
Iron Palladium

Optical chirality sensing of unprotected amino acids, hydroxy acids, amino alcohols, amines and carboxylic acids based on a practical mix-and-measure protocol with readily available copper, iron, palladium, manganese, cerium or rhodium salts is demonstrated.

scholarly journals Optical Chirality and Single-Photon Isolation

2020 ◽  
Author(s):  
Lei Tang ◽  
Keyu Xia
Keyword(s):  
Information Processing ◽  
Quantum Information ◽  
Quantum Information Processing ◽  
Single Photon ◽  
Kerr Nonlinearity ◽  
Single Photons ◽  
Optical Isolation ◽  
Optical Chirality ◽  
Magneto Optical Effect ◽  
Quantum Optical

Optical isolation is important for protecting a laser from damage due to the detrimental back reflection of light. It typically relies on breaking Lorentz reciprocity and normally is achieved via the Faraday magneto-optical effect, requiring a strong external magnetic field. Single-photon isolation, the quantum counterpart of optical isolation, is the key functional component in quantum information processing, but its realization is challenging. In this chapter, we present all-optical schemes for isolating the backscattering from single photons. In the first scheme, we show the single-photon isolation can be realized by using a chiral quantum optical system, in which a quantum emitter asymmetrically couples to nanowaveguide modes or whispering-gallery modes with high optical chirality. Secondly, we propose a chiral optical Kerr nonlinearity to bypass the so-called dynamical reciprocity in nonlinear optics and then achieve room-temperature photon isolation with low insertion loss. The concepts we present may pave the way for quantum information processing in an unconventional way.

scholarly journals Importance of higher-order multipole transitions on chiral nearfield interactions

Nanophotonics ◽  
2019 ◽  
Vol 8 (5) ◽  
pp. 941-948 ◽  
Author(s):  
Jungho Mun ◽  
Junsuk Rho
Keyword(s):  
Dipole Approximation ◽  
Higher Order ◽  
Plasmonic Nanostructures ◽  
Chiral Molecules ◽  
Theoretical Frameworks ◽  
Full Field ◽  
3 Dimensional ◽  
Optical Chirality ◽  
T Matrix ◽  
Molecular Signals

AbstractSurface-enhanced circular dichroism (SECD) of chiral molecules adsorbed on plasmonic nanostructures can substantially enhance chiroptical molecular signals by several orders, which is otherwise very weak to be directly measured. Several mechanisms were proposed to explain this extreme enhancement, but the exact mechanism is still controversial. We investigate strong higher-order multipole contribution to SECD near plasmonic nanostructures using the superposition T-matrix method and discuss how 3-dimensional full-field simulations implementing a homogeneous chiral medium have succeeded in the reconstruction of the extreme enhancement. We also discuss how theoretical studies modeling chiral molecules based on dipole approximation have failed to reconstruct the extreme enhancement and show that SECD enhancement of such chiral dipoles is directly governed by optical chirality enhancement. In addition, strong multipolar transitions in subwavelength chiral plasmonic nanoparticles are discussed based on the T-matrix. This work reviews theoretical frameworks describing chiral molecules, demonstrates significant contribution of a multipolar transition on the extreme SECD enhancement near plasmonic nanostructures, and emphasizes the importance of a multipolar transition in chiral nearfield interaction.

Chiral defects on single-handed helical Ta2O5 nanotubes prepared using a supramolecular templating approach

RSC Advances ◽  
2015 ◽  
Vol 5 (73) ◽  
pp. 59384-59389 ◽  
Author(s):  
Chuanyong Zhang ◽  
Yong Wang ◽  
Jiaming Qin ◽  
Baozong Li ◽  
Yi Li ◽  
...  
Keyword(s):  
Point Defects ◽  
Optical Chirality

Chiral point defects were responsible for the optical chirality of the single-handed helical Ta2O5 nanotubes prepared using a supramolecular templating approach.

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