Synthesis of new Chromophors to use in Optoelectronic applications

气体传感在实现用于监测来自不同来源的排放的许多不同技术方面发挥着关键作用。光子气体传感器具有独特的优势，可以构建与cmos兼容，具有成本效益的便携式传感系统，并且完全集成在单个芯片上。为了在传感器之间有效地传输数据，到目前为止，电驱动调制依赖于低效的折射率变化，这是由载流子耗尽、注入或积累调制硅中的载流子密度引起的。然而，在非线性光学（NLO）聚合物中，电光（EO）效应源于有机分子的电子超极化性，这允许极高的调制速度。此外，有机分子的分子工程可以导致聚合物中的波克尔系数极高，超过铌酸锂（用于光学数据传输应用的工业标准无机材料）可用值的10倍。因此，基于硅和聚合物混合材料系统的光子器件很有吸引力，因为它们结合了硅的强光限制能力和聚合物的优越NLO特性，从而实现极快的调制，超低的驱动功率和小的几何占用空间，这将使光学收发器的产生和遥感平台之间的数据传输成为可能。博士学位包括EO所需单体的合成和开发，以及聚合物的制备，这些聚合物将与Frederic Gardes教授的研究小组合作，在几个光子设备上进行测试。

Gas sensing plays a key role in enabling many different technologies used to monitor the emissions from different sources. Photonic gas sensors exhibit unique advantages of building a CMOS-compatible, cost-effective, and portable sensing system fully integrated on a single chip. In order to transmit data efficiently between sensors, so far electrically driven modulation relies on un-efficient refractive index change resulting from the modulation of carrier density in silicon either by carrier depletion, injection or accumulation. In nonlinear optical (NLO) polymers however, the electro-optic (EO) effect originates from the electronic hyperpolarisability of the organic molecules, which allows extremely high modulation speeds. Furthermore, molecular engineering of organic molecules can lead to extremely high Pockels-coefficients in polymers exceeding 10 times the value available in the lithium-niobate, the industrial standard inorganic material used in optical data transmission application. Photonic devices based on a hybrid material system merging silicon and polymer are therefore attractive since they combine the strong light confining abilities of silicon with the superior NLO properties of polymers, thereby enabling extremely fast modulation, ultra-low driving power and small geometric footprint that will enable the generation of optical transceivers and data transfer between remote sensing platforms.The PhD consists in the synthesis and development of the monomers required for EO and the preparation of the polymers that will be tested in several Photonic Devices in collaboration with the research group of Professor Frederic Gardes.