Vertical continuous composition gradient devices

该项目的目的是通过实验证明所提出的基于两个堆叠的光电探测器的单片式基于半导体的波长计的器件概念的可行性，第一个具有垂直连续的组成梯度。作为模型系统，我们将使用（Mg，Zn）O和（Al，In，Ga）2 O3合金与UV响应的系统。波长范围的扩展应通过采用两种不同材料梯度的先进器械来证明，覆盖两个不同的波长范围。应将实验器械特征与建模进行比较，并相应调整/完善建模。应研究这种单片波长计的实际极限，特别是绝对波长精度（校准后）方面的极限，以及其他性能，如再现性、稳定性和可达到的测量速度，并将其与在相同紫外光谱范围内工作的商用干涉仪波长计的规格进行比较。我们希望我们的设备能够以很小的尺寸和成本提供类似的性能。

The objective of this project is to experimentally prove the feasibility of a proposed device concept of a monolithic, semiconductor-based wavemeter based on two stacked photodetectors, the first having a vertical continuous composition gradient. As model systems we will use (Mg,Zn)O and (Al,In,Ga)2O3 alloys for a system with UV response. The extension of the wavelength range shall be demonstrated by an advanced device employing two different material gradients, covering two different wavelength ranges. The experimental device characteristics shall be compared to the modelling and the modelling shall be adapted/refined accordingly. The practical limits of such monolithic wavemeter, especially in terms ofabsolute wavelength accuracy (after calibration), but also other properties such as reproducibility, stability and achievable measurement speed shall be investigated and compared to specifications of commercial interferometer-based wavemeters working in the same UVspectral range. We expect our device to deliver similar performance for a tiny fraction of size and cost.