Principles for single-pixel terahertz imaging based on the engineering of illuminating and collecting nonparaxial diffractive optics
arxiv(2023)
摘要
The art of light engineering unveils a world of possibilities through the
meticulous manipulation of photonic properties such as intensity, phase, and
polarization. The precise control over these optical properties under various
conditions finds application in fields spanning communication, light-matter
interactions, laser direct writing, and imaging, enriching our technological
landscape. In this study, we embark on a journey to establish a rational
framework for the design and assembly of nonparaxial THz imaging systems. Our
focus centers on a lensless photonic system composed solely of flat-silicon
diffractive optics. These elements include the high-resistivity silicon-based
nonparaxial Fresnel zone plate, the Fibonacci lens, the Bessel axicon, and the
Airy zone plate, all meticulously crafted using laser ablation technology. A
systematic exploration of these flat elements in various combinations sheds
light on their strengths and weaknesses. Our endeavor extends to the practical
application of these optical components, where they illuminate samples and
capture the light scattered from these raster-scanned samples using
single-pixel detectors. Through a comprehensive examination, we evaluate
imaging systems across diverse metrics that include contrast, resolution, depth
of field and focus. This multifaceted approach allows us to distill rational
design principles for the optimal assembly of THz imaging setups. The findings
of this research chart an exciting course toward the development of compact,
user-friendly THz imaging systems where sensors and passive optical elements
seamlessly integrate into a single chip. These innovations not only enhance
capabilities in THz imaging but also pave the way for novel applications,
ushering in a new encouraging era of advanced THz photonic technology.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要