photo by J. Adam Fenster / University of Rochester
Optical cloaking allows objects to be hidden in plain sight or to become invisible by guiding light around anything placed inside the cloak. While cloaking has been popularized in fiction, like in the “Harry Potter” books, researchers in recent years have started realizing cloaks that shield objects from view by controlling the flow of electromagnetic radiation around them.
In the Journal of Applied Physics, by AIP Publishing, researchers from the Toyota Research Institute of North America examined recent progress of developing invisibility cloaks that function in natural incoherent light and can be realized using standard optical components, part of ongoing research over the last two decades.
Invisibility cloaks potentially have a broad array of applications in sensing and display devices in warfare, surveillance, blind spot removal in vehicles, spacecraft, and highly efficient solar cells. The researchers examined blind spots that occur in vehicles, such as the windshield pillars, the stanchions that frame windshields.
“We are always looking for ways to keep drivers and passengers safe while driving,” said author Debasish Banerjee. “We started exploring whether we could make the light go around the pillar so it appeared transparent.”
Advances in metamaterials, engineered complexes of metals and dielectrics for manipulating electromagnetic waves, have opened up the possibility for realizing optical cloaks around an object by making incoming light bypass it.
Perfect optical cloaking requires the total scattering of electromagnetic waves around an object at all angles and all polarizations and over a wide frequency range, irrespective of the medium. This has not yet been achieved.
However, by simplifying the invisibility requirements, innovative work with spherical transformation cloaks, carpet cloaks, plasmonic cloaks, and mantle cloaks in narrowband microwave, infrared, and optical wavelengths has been accomplished over the last two decades.
“One of the real challenges is that we have to optimize optical elements around an object so that phase relationships are preserved,” said Banerjee.
For optimization, artificial intelligence and machine learning may help resolve certain challenges. Algortihms can help solve the necessary inverse design problem in the context of practical cloaking devices.
These can be powerful tools to predict and analyze the optical responses of these devices or detectors without time-consuming and expensive simulations, which may raise the possibility of intelligent invisibility that is adaptive to movements, shapes, and the environment.
With the fast development of both AI-aided design and additive manufacturing capabilities, it is foreseeable that flexible cloaks that could function effectively at all incident angles with a high cloaking ratio and a wide field of view could be realized and mass-produced at low cost and high efficiency.
Original Article: Bending Light for Safer Driving; Invisibility Cloaks to Come?
More from: Toyota Research Institute
The Latest Updates from Bing News & Google News
Go deeper with Bing News on:
- Acoustics researchers develop novel underwater carpet cloak
Aided by a reflecting surface, acoustic carpet cloak has become one of the most practically feasible invisibility devices. In their previous studies, researchers from the Institute of Acoustics of ...
- ABC News: Seashell's secret to bending light
It's a simple shell, but it could hold the secret to bending light. ASSOC PROF TIFFANY WALSH, Deakin University: By learni ...
- rochester cloak
Students at the University of Rochester have developed a clever optical system which allows for limited invisibility thanks to a bit of optic sorcery physics. Almost all invisibility technologies ...
- Global Market for Metamaterials: Industry Insights, Market Size, Major Key Players and Current Trends Analysis and Forecast: 2022-2031
Metamaterials are artificially engineered structures with exceptional material properties (acoustic, electrical, magnetic, optical ... has focused on cloaking and light manipulation, but the ...
- Cell Cloaking to Reduce Foreign Body Response to Medical Implants
Researchers at the Korea Institute of Science and Technology have developed a technique to coat implantable materials, such as stents, with extracellular matrix components and cells. The new ...
Go deeper with Google Headlines on:
Go deeper with Bing News on:
- Disney Plus' Prey review: 'most effective Predator flick since the first one"
DIRECTOR Dan Trachtenberg (10 Cloverfield Lane) goes back to the roots of the Predator franchise with a tense survival movie.
- Halo 2 Streamer JerValiN Beats Legendary All Skulls On Challenge, Wins $20,000
Last month, Twitch streamer and YouTuber MoistCr1TiKaL put out a bounty of $20,000 for anyone who could beat Halo 2 on Legendary difficulty with all Skulls on without dying - otherwise known as a LASO ...
- Twitch streamer JerValiN beats Halo 2 LASO without dying, making history
which provides Master Chief with an invisibility cloak) without any deaths. No other player has managed to achieve this feat, meaning that JerValiN has officially made gaming history. The ...
- Why Harry Potter’s Daniel Radcliffe Wore The Same Outfit Everyday When Struggling With The Paparazzi
Why did Daniel Radcliffe wear the same thing in front of the paparazzi? Just like his Harry Potter counterpart, Daniel Radcliffe experienced a ton of fame in real life. After playing our favorite boy ...
- ‘Prey’ Review: ‘Predator’ Prequel Set in the Comanche Nation in 1719 Is a Slight Improvement in a Derivative Franchise
Prey,” a prequel in the “Predator” series, stands as proof that Hollywood today can make a socially conscious movie out of anything. I offer an advance apology to fans of this dogged franchise when I ...