研究目的
Investigating the modulation behaviors, conductivities, and carrier dynamics of single and multilayer graphenes for THz and related technologies applications.
研究成果
The study demonstrated tunable modulation behaviors up to 100% for MLG and 50% for SLG, with a parabolic increase in conductivities as layer numbers increased. Photoconductivity studies revealed distinct behaviors between SLG and MLG, indicating potential for high-speed electronic and photonic applications.
研究不足
The study is limited by the instrument's bandwidth and the specific conditions under which the graphene samples were tested.
1：Experimental Design and Method Selection:
Time domain and time resolved terahertz studies were conducted on SLG and MLG samples and modulator devices.
2：Sample Selection and Data Sources:
SLG and MLG samples on quartz or thin polymer substrates with gold electrodes were used.
3：List of Experimental Equipment and Materials:
Graphene samples, quartz or polymer substrates, gold electrodes, ionic dopants.
4：Experimental Procedures and Operational Workflow:
Voltage dependent amplitude modulation behavior was observed, and frequency dependent conductivity was measured.
5：Data Analysis Methods:
Conductivity behaviors were analyzed from Drude-Smith to Drude as layer number increased, and carrier dynamics were studied with optical pump terahertz probe measurements.
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