Aligned gold nanobowl arrays: their fabrication, anisotropic optical response and optical grating applications

2015 ◽  
Vol 3 (1) ◽  
pp. 51-57 ◽  
Author(s):  
Xinyang Li ◽  
Yanchun Wu ◽  
Lifeng Hang ◽  
Dandan Men ◽  
Weiping Cai ◽  
...  
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Optical Response ◽  
Colloidal Lithography ◽  
Flexible Film ◽  
Optical Grating

Aligned Au nanobowl arrays on a flexible film with specific optical properties were obtained by combining template-assisted self-assembly and colloidal lithography.

scholarly journals Controlling the Emission Properties of Quantum Rods via Multiscale 3D Ordered Organization

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Thomas Bizien ◽  
Marie Postic ◽  
Pascale Even-Hernandez ◽  
Pascal Panizza ◽  
Cristelle Mériadec ◽  
...  
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Optical Response ◽  
Optically Active ◽  
Water Soluble ◽  
X Ray ◽  
Quantum Rods ◽  
X Ray Scattering ◽  
Optical Electron ◽  
Assembly Behavior

A specific organization of optically active nanoscale objects can greatly affect the optical response of a system. Here, we report the controlled modification of the fluorescent emission by the assembly of water-soluble quantum rods (QRs). Our study combines optical, electron microcopy, and X-ray scattering characterizations to reveal a correlation between the self-assembly behavior of QRs into ordered 3D-arrays and the optical properties (luminescence) of formed assemblies, where the observed optical response is highly dependent on the QR aspect ratio. Specifically, shorter, 18 nm long QRs (QR18), exhibiting a well-defined smectic packing, demonstrate an enhancement of the emission intensity accompanied by a red shift and a lifetime reduction. In contrast, 40 nm long QRs (QR40), forming a columnar phase, does not show these optical properties.

Self-Assembly Optical Components

2003 ◽  
Vol 771 ◽  
Author(s):  
Pavel I. Lazarev ◽  
Michael V. Paukshto ◽  
Elena N. Sidorenko
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Crystalline State ◽  
Liquid Crystalline ◽  
Film Deposition ◽  
X Ray Diffraction ◽  
Optical Components ◽  
Crystal Film ◽  
Solid Film ◽  
Thin Crystal

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

scholarly journals Analysis of Dielectric Waveguide Grating and Fabry–Perot Modes in Elastic Grating in Optical Detection of Ultrasound

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4081
Author(s):  
Suejit Pechprasarn ◽  
Chayanisa Sukkasem ◽  
Phitsini Suvarnaphaet
Keyword(s):  
Optical Properties ◽  
Dielectric Waveguide ◽  
Figure Of Merit ◽  
Pressure Range ◽  
Optical Filter ◽  
Grating Period ◽  
Wave Mode ◽  
Waveguide Grating ◽  
Fabry Perot ◽  
Optical Grating

In our previous work, we have demonstrated that dielectric elastic grating can support Fabry–Perot modes and provide embedded optical interferometry to measure ultrasonic pressure. The Fabry–Perot modes inside the grating provide an enhancement in sensitivity and figure of merit compared to thin film-based Fabry–Perot structures. Here, in this paper, we propose a theoretical framework to explain that the elastic grating also supports dielectric waveguide grating mode, in which optical grating parameters control the excitation of the two modes. The optical properties of the two modes, including coupling conditions and loss mechanisms, are discussed. The proposed grating has the grating period in micron scale, which is shorter than the wavelength of the incident ultrasound leading to an ultrasonic scattering. The gap regions in the grating allow the elastic grating thickness to be compressed by the incident ultrasound and coupled to a surface acoustic wave mode. The thickness compression can be measured using an embedded interferometer through one of the optical guided modes. The dielectric waveguide grating is a narrow bandpass optical filter enabling an ultrasensitive mode to sense changes in optical displacement. This enhancement in mechanical and optical properties gives rise to a broader detectable pressure range and figure of merit in ultrasonic detection; the detectable pressure range and figure of merit can be enhanced by 2.7 times and 23 times, respectively, compared to conventional Fabry–Perot structures.

Novel bimetallic MOF phosphors with an imidazolium cation: structure, phonons, high- pressure phase transitions and optical response

2019 ◽  
Vol 48 (1) ◽  
pp. 242-252 ◽  
Author(s):  
Maciej Ptak ◽  
Bartosz Zarychta ◽  
Dagmara Stefańska ◽  
Aneta Ciupa ◽  
Waldeci Paraguassu
Keyword(s):  
High Pressure ◽  
Optical Properties ◽  
Phase Transitions ◽  
Optical Response ◽  
High Pressure Phase ◽  
Imidazolium Cation ◽  
Perovskite Type ◽  
Pressure Phase

We report the synthesis, high-pressure phase transitions and optical properties of novel bimetallic perovskite-type MOFs with imidazolium ions.

scholarly journals RAFT-photomediated PISA in dispersion: mechanism, optical properties and application in templated synthesis

2019 ◽  
Vol 10 (18) ◽  
pp. 2316-2326 ◽  
Author(s):  
Vitalii Tkachenko ◽  
Camélia Matei Ghimbeu ◽  
Cyril Vaulot ◽  
Loïc Vidal ◽  
Julien Poly ◽  
...  
Keyword(s):  
Optical Properties ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Templated Synthesis ◽  
Dispersion Mechanism

Diblock copolymer nanoparticles were prepared by photomediated polymerization-induced self-assembly (“photo-PISA”) in dispersion.

Investigation of the third-order nonlinear optical properties in porphyrin solutions in the picosecond regime

2015 ◽  
Vol 24 (03) ◽  
pp. 1550030 ◽  
Author(s):  
M. Chniti ◽  
C. Cassagne ◽  
J. L. Godet ◽  
G. Boudebs
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Time Dependence ◽  
Nonlinear Optical ◽  
Optical Response ◽  
Spectral Width ◽  
Incident Laser ◽  
Third Order ◽  
The Third ◽  
532 Nm

The D4σ-Z-scan technique is used to evaluate the sign and the magnitude of the nonlinear (NL) refractive index and the NL absorption (NLA) coefficient with a laser delivering single pulses in the picosecond regime at 355 nm, 532 nm and 1064 nm. The NL optical response of the zinc porphyrins (Pph) has been found to be significantly enhanced. The study of the NLA and refraction is performed, taking into account the time dependence and the spectral width of the incident laser. The variations of the NL coefficients as a function of the intensity and the concentration are provided and are found to be linear.

Sign in / Sign up

Export Citation Format

Share Document