研究目的
Investigating the simultaneous observation and use of linear and quadratic electro-optical effects in electro-optical materials, and proposing a method to determine higher-order susceptibilities of these materials.
研究成果
The study successfully demonstrates the significant impact of the quadratic electro-optical effect on the overall electro-optical response, even in materials with acentric molecular order. It proposes a method to distinguish between linear and quadratic electro-optical responses, which is crucial for the design of future reconfigurable and field-programmable photonic devices based on slot waveguides.
研究不足
The study acknowledges the challenges in sample preparation and the need for high poling voltages, which can lead to breakdowns. Additionally, the long-term stability of organic electro-optical materials due to relaxation processes is a limitation.
1：Experimental Design and Method Selection:
The study employs a slot waveguide ring resonator fabricated in an integrated photonic circuit technology, embedded with a guest-host polymer system for observing electro-optical effects.
2：Sample Selection and Data Sources:
The active electro-optical material used is a guest-host polymer system consisting of the azobenzene dye disperse red 1 in a poly(methyl methacrylate) matrix.
3：List of Experimental Equipment and Materials:
A silicon slot waveguide ring resonator, azobenzene dye Disperse Red 1, poly(methyl methacrylate) matrix, and various optical and electrical measurement setups including a tunable external cavity laser, photodiode, and digital sampling oscilloscope.
4：Experimental Procedures and Operational Workflow:
The experiment involves measuring the resonance wavelength shift as a function of applied voltage before and after a poling procedure to align the dye molecules.
5：Data Analysis Methods:
The data is analyzed using a polynomial regression model to separate the contributions of linear and quadratic electro-optical effects.
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fiber polarization rotator
FPC031
Thorlabs
Adjusting the polarization of the laser light
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photodiode
DET08CFC/M
Thorlabs
Translating the optical signal to an electrical signal
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DC source
2400
Keysight
Applying DC signals for static measurements
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Disperse Red 1
Sigma Aldrich
Active electro-optical material in the guest-host polymer system
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poly(methyl methacrylate)
PMMA
Matrix material in the guest-host polymer system
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tunable external cavity laser
TUNICS T100S-HP
Yenista
Light source for measuring the wavelength dependent behavior of the ring resonator
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digital sampling oscilloscope
Measuring the optical signal
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digital multimeter
Measuring the optical signal
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function generator
Generating AC signals for dynamic measurements
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tungsten DC probes
A 40A-GSG-150-P
Picoprobes
Connecting the GSG electrodes to the electric power source
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