The manipulation of focused light beams is widely used in our lives, such as camera lenses and signal transmission. Although there are traditional lenses that realize off-axis focusing, the requirements of tilting need extra space, and the tilting stage hinders its compact integration. These disadvantages hinder the development of device miniaturization or increased construction complexity. Meta-devices composed of artificial nanostructures can manipulate the incident electromagnetic wave's phase, polarization, and amplitude. Meta-devices show excellent performance and novel applications to meet optical demands. The significant advantages of meta-devices are their new properties, lighter weight, and compact size. Here, we demonstrate cascaded meta-devices for focal length tuning in the z-axis (1-dimensional, 1D), focal spot manipulation in the x-y plane (2-dimensional, 2D), and x-y-z axis (3-dimensional, 3D). The varifocal meta-devices are used for bioimaging and 6G signal transmission.
Meta-lenses, distinguished by their compact size and adaptable manipulation, have attracted considerable interest. Yet, challenges persist for conventional tunable meta-lenses, including complexity, high costs, and limited responses, constraining their performance and applications. In our research, we introduce innovative tunable water and 3D printing meta-lenses tailored for millimeter waves. This technology empowers the delivery of the focusing spot to arbitrary positions in two-dimensional or three-dimensional space. Notably, it allows the precise transmission of a highly concentrated signal to a specific location, with the added capability of adjusting the transmission direction freely. This breakthrough enables the development of secure, flexible, and highly directive 6G communication systems. Our proposed approach overcomes existing limitations and holds promise for diverse applications in wireless power transfer, zoom imaging, and remote sensing.
Meta-lens is an emerging optical device which composed of artificial nanostructures can freely manipulate the phase and amplitude of light. Meta-lenses show excellent performance and novel applications to meet the optical demands. The fascinating advantages of meta-lenses are their new properties, lighter weight, small size, high efficiency, better performance, broadband operation, lower energy consumption, data volume reduction, and CMOS compatibility for mass production. We demonstrate an intelligent depth-sensing system prototype applicable for diverse scenes, a switchable stereo vision system that adopts a 60 × 60 achromatic meta-lens array to measure depth over a 30 cm range with the support of deep learning. This system combines a light field camera and a structured light system to adapt to all light levels. The design, application, and experimental verification of the intelligent depth-sensing meta-device are reported in this talk.
Optical meta-devices are composed of the collection of artificial subwavelength nanostructures. Phase, polarization, or amplitude of the incident electromagnetic waves can be manipulated by the specifically designed meta-devices. The demands of the new generation of photonics currently extend from classical to quantum optics. We report our progress in the design, fabrication, and application of the novel optical meta-devices from classical to quantum optics. We show a novel achromatic meta-lens array light field optical system for applications in imaging and sensing. We integrate a meta-lens array with a thin slice BBO nonlinear crystal to form a high-dimensional quantum entanglement optical chip. Results of the excellent mutual entanglement fidelity in 2-dimensional, 3-dimensional, and 4-dimensional experiments have successfully demonstrated the novel function of our high-dimensional optical quantum chip.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.