研究目的
Investigating the design and performance of a low-voltage electroreflective modulator based on coupled multiple quantum wells (CMQWs) for integration with low-loss polymer optical waveguides towards inter-chip and on-board optical interconnects at 850 nm.
研究成果
The study concludes that the demonstrated low-voltage electroreflective modulator based on CMQWs is a promising candidate for integration with ultralow power inter-chip optical interconnects, offering significant improvements in extinction ratio and insertion loss at low voltages compared to conventional modulators.
研究不足
The study acknowledges that the current device serves as a proof of concept and has plenty of room for further optimization, particularly in matching the n+ electrode stack thickness to the electron-absorption induced F-P cavity modes and focusing on s-polarization to optimize the F-P cavity effect.
1：Experimental Design and Method Selection:
The study involves the design and fabrication of an electroreflective modulator using CMQWs, with a focus on enhancing the electroabsorption effect through a Fabry-Pérot cavity formed by a top polymer cladding and a bottom Au mirror.
2：Sample Selection and Data Sources:
The MQW structure was grown by molecular beam epitaxy (MBE) on Si-doped n+ GaAs wafers. The epitaxy layers form a p-i-n diode structure with nominal 10 nm GaAs/5 nm Al
3：3Ga7As QWs in the intrinsic region. List of Experimental Equipment and Materials:
The fabrication process includes patterning Ti/Pt/Au electrodes, bonding the CMQW wafer onto a silica substrate, filling the gap with optical adhesive, mechanically lapping the GaAs substrate, chemically etching away the remaining GaAs substrate, depositing Au back reflector layer, and patterning N electrode on the CMQW.
4：Experimental Procedures and Operational Workflow:
The device performance was evaluated through reflectance spectra measurements under various reverse biased voltages, with a superluminescent LED centered at 856 nm.
5：Data Analysis Methods:
The reflection spectra were calculated using multilayer transfer-matrix method for absorptive media, and finite element simulation using COMSOL was employed to confirm the analytical reflection spectra.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
