Optical devices combining an organic semiconductor crystal with a two-dimensional inorganic diffraction grating

2016 ◽  
Vol 108 (5) ◽  
pp. 053304
Author(s):  
Takenori Kitazawa ◽  
Takeshi Yamao ◽  
Shu Hotta
Keyword(s):  
Organic Semiconductor ◽  
Diffraction Grating ◽  
Optical Devices ◽  
Two Dimensional ◽  
Semiconductor Crystal

Ultra-thin two-dimensional molecular crystals grown on a liquid surface for high-performance phototransistors

2021 ◽  
Author(s):  
Shuyuan Yang ◽  
Yu Zhang ◽  
Ying Wang ◽  
Jiarong Yao ◽  
Lijuan Zhang ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
High Performance ◽  
Elevated Temperatures ◽  
Liquid Surface ◽  
Molecular Crystals ◽  
Two Dimensional ◽  
Poor Solubility

Bilayer 2D molecular crystals of an organic semiconductor with poor solubility were grown on a liquid substrate at elevated temperatures. The molecularly thin crystals exhibited superior mobility and photoresponse.

Multi-objective optimization of two-dimensional phoxonic crystals with multi-level substructure scheme

2016 ◽  
Vol 30 (09) ◽  
pp. 1650046 ◽  
Author(s):  
S. Zhang ◽  
J. Yin ◽  
H. W. Zhang ◽  
B. S. Chen
Keyword(s):  
Optical Devices ◽  
Two Dimensional ◽  
Regular Pattern ◽  
Multi Objective Optimization ◽  
New Materials ◽  
Optomechanical Systems ◽  
Multi Objective ◽  
Design And Synthesis ◽  
Multi Level ◽  
Photonic Band

Phoxonic crystal (PXC) is a promising artificial periodic material for optomechanical systems and acousto-optical devices. The multi-objective topology optimization of dual phononic and photonic max relative bandgaps in a kind of two-dimensional (2D) PXC is investigated to find the regular pattern of topological configurations. In order to improve the efficiency, a multi-level substructure scheme is proposed to analyze phononic and photonic band structures, which is stable, efficient and less memory-consuming. The efficient and reliable numerical algorithm provides a powerful tool to optimize and design crystal devices. The results show that with the reduction of the relative phononic bandgap (PTBG), the central dielectric scatterer becomes smaller and the dielectric veins of cross-connections between different dielectric scatterers turn into the horizontal and vertical shape gradually. These characteristics can be of great value to the design and synthesis of new materials with different topological configurations for applications of the PXC.

The Elastic Moduli of Silver Thin Films Measured with a New Microtensile Tester

1991 ◽  
Vol 239 ◽  
Author(s):  
J. Ruud ◽  
D. Josell ◽  
A. L. Greer ◽  
F. Spaepen
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Diffraction Grating ◽  
Strain Measurement ◽  
Elastic Moduli ◽  
Two Dimensional ◽  
Bulk Crystals ◽  
Free Standing ◽  
Tensile Direction ◽  
Silver Thin Films

ABSTRACTA new design for a thin film microtensile tester is presented. The strain is measured directly on the free-standing thin film from the displacement of laser spots diffracted from a thin grating applied to its surface by photolithography. The diffraction grating is two-dimensional, allowing strain measurement both along and transverse to the tensile direction. In principle, both Young's modulus and Poisson's ratio of a thin film can be determined. Ag thin films with strong <111> texture were tested. The measured Young moduli agreed with those measured on bulk crystals, but the measured Poisson ratios were low, most likely due to slight transverse folding of the film that developed during the test.

scholarly journals Real-Time Optical and Electronic Sensing with a β-Amino Enone Linked, Triazine-Containing 2D Covalent Organic Framework

2019 ◽  
Author(s):  
Ranjit Kulkarni ◽  
Yu Noda ◽  
Deepak K. Barange ◽  
Yaroslav S. Kochergin ◽  
Barbora Balcarova ◽  
...  
Keyword(s):  
Pore Structure ◽  
Real Time ◽  
Visible Spectrum ◽  
Optical Devices ◽  
Two Dimensional ◽  
Bulk Conductivity ◽  
Electronic Response ◽  
Genuine Use ◽  
Predictive Design ◽  
Electronic Sensing

Fully-aromatic, two-dimensional covalent organic frameworks (2D COFs) are hailed as candidates for electronic and optical devices, yet to-date few applications emerged that make genuine use of their rational, predictive design principles and permanent pore structure. Here, we present a 2D COF made up of chemoresistant β-amino enone bridges and Lewis-basic triazine moieties that exhibits a dramatic real-time response in the visible spectrum and an increase in bulk conductivity by two orders of magnitude to a chemical trigger - corrosive HCl vapours. The optical and electronic response is fully reversible using a chemical switch (NH<sub>3</sub> vapours) or physical triggers (temperature or vacuum). These findings demonstrate a useful application of fully-aromatic 2D COFs as real-time responsive chemosensors and switches.

scholarly journals Real-Time Optical and Electronic Sensing with a β-Amino Enone Linked, Triazine-Containing 2D Covalent Organic Framework

2019 ◽  
Author(s):  
Ranjit Kulkarni ◽  
Yu Noda ◽  
Deepak K. Barange ◽  
Yaroslav S. Kochergin ◽  
Barbora Balcarova ◽  
...  
Keyword(s):  
Pore Structure ◽  
Real Time ◽  
Visible Spectrum ◽  
Optical Devices ◽  
Two Dimensional ◽  
Bulk Conductivity ◽  
Electronic Response ◽  
Genuine Use ◽  
Predictive Design ◽  
Electronic Sensing

Fully-aromatic, two-dimensional covalent organic frameworks (2D COFs) are hailed as candidates for electronic and optical devices, yet to-date few applications emerged that make genuine use of their rational, predictive design principles and permanent pore structure. Here, we present a 2D COF made up of chemoresistant β-amino enone bridges and Lewis-basic triazine moieties that exhibits a dramatic real-time response in the visible spectrum and an increase in bulk conductivity by two orders of magnitude to a chemical trigger - corrosive HCl vapours. The optical and electronic response is fully reversible using a chemical switch (NH<sub>3</sub> vapours) or physical triggers (temperature or vacuum). These findings demonstrate a useful application of fully-aromatic 2D COFs as real-time responsive chemosensors and switches.

Molecular design and crystallization process control for thin sheet-shaped organic semiconductor crystals with two-dimensional packing

2021 ◽  
Author(s):  
Yuejuan Wan ◽  
Zejian Zhang ◽  
Haichao Liu ◽  
Jiadong Zhou ◽  
Liqun Liu ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Essential Role ◽  
Crystallization Process ◽  
Molecular Design ◽  
Thin Sheet ◽  
Optoelectronic Devices ◽  
Two Dimensional ◽  
High Property ◽  
Practical Applications ◽  
Semiconductor Crystals

The sheet-liked organic semiconductor crystals with two-dimensional (2D) packed structures play an essential role in practical applications of high-property optoelectronic devices. Here, we reported a practical example in combination with...

2D materials towards ultrafast photonic applications

2020 ◽  
Vol 22 (39) ◽  
pp. 22140-22156
Author(s):  
Xin-Ping Zhai ◽  
Bo Ma ◽  
Qiang Wang ◽  
Hao-Li Zhang
Keyword(s):  
Optical Communications ◽  
2D Materials ◽  
Optical Limiting ◽  
Mode Locking ◽  
Optical Devices ◽  
Optical Modulation ◽  
Two Dimensional ◽  
Two Dimensional Materials ◽  
All Optical ◽  
Ultrafast Photonics

Two-dimensional materials are now excelling in yet another arena of ultrafast photonics, including optical modulation through optical limiting/mode-locking, photodetectors, optical communications, integrated miniaturized all-optical devices, etc.

scholarly journals Long-range exciton transport in brightly fluorescent furan/phenylene co-oligomer crystals

2019 ◽  
Vol 7 (1) ◽  
pp. 60-68 ◽  
Author(s):  
Artur A. Mannanov ◽  
Maxim S. Kazantsev ◽  
Anatoly D. Kuimov ◽  
Vladislav G. Konstantinov ◽  
Dmitry I. Dominskiy ◽  
...  
Keyword(s):  
Long Range ◽  
Organic Semiconductor ◽  
Semiconductor Crystal ◽  
Exciton Diffusion ◽  
Exciton Transport

Long-range exciton diffusion facilitates efficient exciton harvesting in a lightly-doped organic semiconductor crystal.

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