graphene and transition metal dichalcogenides 12 (TMDCs) MX 2, with M a transition metal atom (Mo, W, etc.) and X a chalcogen atom (S, Se or Te), have been intensively studied as candidates for next-generation nanometric optoelectronic devices due to their strong light–matter interactions resulting from 2D quantum confinement 13, 14, 15, 16, 17, 18. The practical applications of such flat lenses for imaging require improving the efficiency and reducing the cost of production through (1) a new optical modulation strategy, (2) new growth methods to prepare materials with suitable dimensions and optical properties and (3) simple and scalable fabrication technologies.ĢD layered materials, e.g. Therefore, it is challenging to use ultrathin 2D materials to achieve sufficient phase or amplitude modulation in ultrathin flat lenses. However, when the material thickness is reduced to the subnanometre scale, the insufficient phase or amplitude modulation based on the intrinsic refractive index and absorption of the materials results in poor lens performance. The ultimate thickness limit of a flat lens is a monolayer of atoms, which can be realized by using monolayer two-dimensional (2D) materials. Thus it is challenging to further reduce the thickness of the lenses based on these principles. According to the working principle of a dielectric metasurface lens, the axial and lateral dimensions ( d) of the individual nanoscale elements should be around the effective wavelength ( λ/ n) of the incident light ( d = λ/ n, where n is the refractive index of the material) to introduce the desired phase and/or amplitude modulations. Recently, metasurfaces 2, 3, 4, 5, 6, 7, 8, 9, metamaterials 10 and superoscillations 11 have been developed to realize flat lenses with thicknesses of several tens to several hundreds of nanometres. Ultrathin flat lenses with the ability to focus optical energy with minimal aberration have attracted great attention as essential optical components in nano-optics and on-chip photonic systems 1. ![]() Our work paves the way for downscaling of optical devices using 2D materials and reports an unprecedented approach for fabricating ultrathin imaging devices. The high focusing performance even allows diffraction-limited imaging at different focal positions with varying magnifications. We achieved highly efficient 3D focusing with subwavelength resolution and diffraction-limited imaging. Femtosecond laser direct writing was applied to generate local scattering media inside a monolayer, which overcomes the longstanding challenge of obtaining sufficient phase or amplitude modulation in atomically thin 2D materials. Here we report a universal method to transform 2D monolayers into ultrathin flat lenses. However, achievement of diffraction-limited focusing and imaging is challenged by their thickness-limited spatial resolution and focusing efficiency. To approach the atomically thin limit, the use of 2D materials is an attractive possibility due to their high refractive indices. Ultrathin flat optics allow control of light at the subwavelength scale that is unmatched by traditional refractive optics. Custom Imaging Solutions - Astronomy & Scientific.Discontinued Models Archive - Diffraction Limited.Mechanical Adapters - Astronomy & Scientific Imaging Solutions.Resources Archive - Diffraction Limited.Garage Sale - Astronomy & Scientific Imaging Solutions.Custom Solutions - Astronomy & Scientific Imaging Solutions.Filter Wheels - Astronomy & Scientific Imaging Solutions.MaxIm DL - Astronomy & Scientific Imaging Solutions.Legacy Product Support - Astronomy & Scientific Imaging ….Find a Dealer - Astronomy & Scientific Imaging Solutions.Packages - Astronomy & Scientific Imaging Solutions.Support - Astronomy & Scientific Imaging Solutions.News - Astronomy & Scientific Imaging Solutions.About Diffraction Limited - Astronomy & Scientific ….Diffraction Limited - Astronomy & Scientific Imaging …. ![]() address : Array,Mountain View,CA,94043,US.desc : *** The IP addresses under this Org-ID are in use by Google Cloud customers ***,Direct all copyright and legal complaints to, all spam and abuse complaints to, fastest response, use the relevant forms above.,Complaints can also be sent to the GC Abuse desk,( ),but may have longer turnaround times.,*** The IP addresses under this Org-ID are in use by Google Cloud customers ***,Direct all copyright and legal complaints to, all spam and abuse complaints to, fastest response, use the relevant forms above.,Complaints can also be sent to the GC Abuse desk,( ),but may have longer turnaround times.,Complaints sent to any other POC will be ignored.Registrar Domain ID: 26798248_DOMAIN_COM-VRSN.Domain expires: 3 Years, 358 Days left.
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