A Flexible Spiraling‐Metasurface as a Versatile Haptic Interface. Issue 8 (18th June 2020)

• Record Type: Journal Article
• Authors: Bilal, Osama R.; Costanza, Vincenzo; Israr, Ali; Palermo, Antonio; Celli, Paolo; Lau, Frances; Daraio, Chiara
• Is Part Of: Advanced materials technologies. Volume 5:Issue 8(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-06-18
• Subjects: actuators -- haptic interfaces -- metasurfaces -- virtual and augmented reality; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202000181
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Haptic feedback is the most significant sensory interface following visual cues. Developing thin, flexible surfaces that function as haptic interfaces is important for augmenting virtual reality, wearable devices, robotics and prostheses. For example, adding a haptic feedback interface to prosthesis could improve their acceptance among amputees. State of the art programmable interfaces targeting the skin feel‐of‐touch through mechano‐receptors are limited by inadequate sensory feedback, cumbersome mechanisms, or narrow frequency of operation. Here, a flexible metasurface is presented as a generic haptic interface capable of producing complex tactile patterns on the human skin at wide range of frequencies. The metasurface is composed of multiple "pixels" that can locally amplify both input displacements and forces. Each of these pixels encodes various deformation patterns capable of producing different sensations on contact. The metasurface can transform a harmonic signal containing multiple frequencies into a complex preprogrammed tactile pattern. The findings, corroborated by user studies conducted on human candidates, can open new avenues for wearable and robotic interfaces. Abstract : Hearing with your skin?! Metasurfaces are designed to convey information through the skin. Through geometry, conventional sheets of material are turned into generic haptic interfaces with high spatial, frequency, and vibrotactile resolutions. The versatility and scalability of the available tactile patterns open possibilities for a range of applications from communication platforms for the deaf and blind to gaming devices.