Nonlinear Optical Compound Donor Structure Heat Resistance
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Solution Overview
Problem
Existing nonlinear optical materials face challenges in achieving high nonlinear optical performance while maintaining heat resistance, especially during electric field poling processes, which are crucial for high-speed electronic circuits and optical signal conversion applications.
Innovation Solution
A nonlinear optical compound with a donor structure D featuring an aryl group substituted with a substituted oxy group, combined with a π-conjugated bridge structure B and an acceptor structure A, enhances nonlinear optical activity and heat resistance, allowing for improved performance in optical elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the nonlinear optical compound is heated to near the glass transition temperature for orientation processing, then the nonlinear optical performance is improved, but the heat resistance deteriorates
Solution Approach 1:
The invention changes the chemical structure parameters of the nonlinear optical compound by introducing a specific donor structure with an aryl group substituted with a substituted oxy group. This structural modification alters the thermal and optical properties, enabling the compound to maintain stability at higher temperatures while preserving nonlinear optical activity. The parameter change is implemented through molecular design rather than process parameter adjustment.
2Productivity
If the signal transmission rate is increased for high-speed electronic circuits, then the productivity is improved, but the temperature increases causing molecular motion that relaxes orientation
Solution Approach 1:
The invention performs preliminary action by pre-heating the nonlinear optical compound to a high temperature (near or above the glass transition temperature) during the orientation processing stage, before the device is put into operation. This preliminary thermal treatment ensures that the compound is already in a state of high molecular mobility, allowing for effective orientation. Once oriented, the compound maintains its orientation even at lower operating temperatures, preventing relaxation during high-speed signal transmission.
3Temperature
If the glass transition temperature of the host material is increased to prevent orientation relaxation, then the heat resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The invention uses a small-molecule nonlinear optical compound that can be easily incorporated into common polymer host materials without requiring specialized high glass transition temperature hosts. The compound itself provides the necessary thermal stability through its molecular structure, allowing the use of standard, readily available polymer materials. This approach avoids the need for complex, expensive, or difficult-to-process host materials.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed compound achieves superior nonlinear optical properties and heat resistance, enabling efficient light intensity and phase modulation with lower electric power consumption, suitable for optical modulators and sensors, including those for terahertz electromagnetic waves.
Implementation Method 1
Nonlinear optical materials can change the intensity and phase of light in response to an external field such as an electric field and a magnetic field and are therefore practically used as optical control elements in optical communication equipment, laser apparatus, and the like. Inter alia, devices such as optical modulators, optical switches, and optical memories utilize the electrooptic effect of non-linear optical materials.
Implementation Method 2
In electric field poling, an electric field is applied to a nonlinear optical material and, by the Coulomb force between the dipole moment of the nonlinear optical compound and the applied electric field, the nonlinear optical compound is oriented toward the applied electric field direction.
Data Source
AI summary
Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore.Solution: a chromophore comprising a donor structure D, a π-conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.