Publications by authors named "Desheng Ruan"
Article Synopsis
- The terahertz (THz) lens is crucial for THz optical systems, but traditional lenses struggle with resolution due to diffraction limits.
- Super-oscillation techniques can create sub-diffraction hotspots to improve microscopic imaging resolution, yet there are few examples of THz lenses using this method.
- This research presents a new planar lens design made from a concentric ring structure that successfully focuses THz light below the diffraction limit, achieving a smaller focal spot and showing potential for advanced imaging applications.
In recent years, graphene nanomesh (GNM), a material with high flexibility and tunable electronic properties, has attracted considerable attention from researchers due to its wide applications in the fields of nanoscience and nanotechnology. Herein, we have processed large-area, uniform arrays of rectangular graphene nanomesh (r-GNM) and circular graphene nanomesh (c-GNM) with different neck widths by electron beam lithography (EBL). The electronic properties of those high-quality GNM samples have been characterized systematically.
View Article and Find Full Text PDFTerahertz wave imaging offers promising properties for non-destructive testing applications in the areas of homeland security, medicine, and industrial inspection. However, conventional optical lenses are heavy and bulky and difficult to integrate. An all-dielectric metasurface provides an attractive way to realize a planar lens of light weight that is ultrathin and offers ease of integration.
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