Optical metasurfaces for image forming systems

• Дата: 2022
• Автори: Крючин, А. А., Рубіш, В. М., Міца, О. В., Мельник, О. Г.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: Інститут проблем реєстрації інформації НАН України 2022
• Теми: metasurfaces; subwavelength arrays; nanolithography; nanostructured elements; light polarization; subwavelength distances
• Онлайн доступ: http://drsp.ipri.kiev.ua/article/view/262795
• Назва журналу: Data Recording, Storage & Processing

The results of an analysis of properties and technologies of optical metasurfaces creation for systems of processing and transformation of optical images are presented. Basic technologies of manufacturing optical metasurfaces and materials for creating optical metasurfaces are determined. Particular attention is paid to the analysis of methods for the use of active metasurfaces. Promising technology for the creation of diffractive optical elements is the use of optical metasurfaces, which consist of nanostructured elements located in subwavelength arrays. Metasurfaces in interaction with the electromagnetic field of the incident wave are able to control and control the wavefront of the electromagnetic field, namely to analyze and change the phase, amplitude and polarization of light. Metalizes (metasurfaces) have many degrees of freedom to control the wavefront, which has a number of advantages over bulky optical elements. The metasurfaces allow you to create ultra-thin flat and multifunctional optical components which permit one to make significantly reducing the size and complexity of the manufacture of optical elements, as well as implement new functions for optical image processing. The production of metasurfaces is based on technological processes used in the production of semiconductor nanoscale elements. Metasurfaces are created in the form of microcavities or «meta-atoms», which allow realize «flat photonics» in optical systems and new processes of interaction with incident electromagnetic radiation, which differ significantly from those observed when using three-dimensional (3D) bulk materials. The prospect of meta-surface optics lies in the effective control of electromagnetic waves, which cannot be realized by traditional three-dimensional optics. The metasurfaces allow you to successfully correct spherical, chromatic and angle-dependent aberrations. One can control the geometric parameters of meta-atoms by controlling the reflected wavefront or the wavefront that has passed through the object. One of the most common implementations of metasurfaces is metal lenses, which allow you to replace bulk lenses and lenses with nanostructured, lightweight and compact thin film without loss of performance. The value of implementing the concept of meta-surfaces lies in the implementation of new functions that traditional optical systems cannot be implemented. Metasurfaces consisting of planar structures can be fabricated using nanolithography techniques, including direct laser recording technology on inorganic resistors and nanodrinting. With the help of metasurfaces, nanoscale rods can be used to make flat lenses without chromatic aberration throughout the optical range. Metasurfaces have great information potential and can contribute to the future development of highly integrated micro- and nano-optoelectronic systems.