In response to a Freedom of Information Act (FOIA) request submitted on March 23, 2022, the Defense Intelligence Agency (DIA) has released a redacted document titled “Technology Forecast: Metamaterials In Cloaking Applications,” originally published, but classified SECRET, in 2010. The request originally filed by The Black Vault in March 2022, received the final response via email on July 25, 2024, with the letter dated July 24, 2024.
The released document highlights several critical aspects of metamaterials and their applications in cloaking technology. Despite the extensive redactions, some significant points are discernible.
The document discusses the theoretical and experimental work on using metamaterials to achieve “invisibility cloaks.” It references a presentation by Professor C.T. Chan from The Hong Kong University of Science and Technology at the META’10 conference in Cairo, Egypt. Chan’s work demonstrated the use of metamaterials to create optical illusions and achieve cloaking effects without completely surrounding the object.
One of the key techniques mentioned is Transformation Optics, which involves transforming the equations of wave propagation to design metamaterials capable of creating illusions. This method was used to make objects appear invisible or to alter their appearance, such as making an apple look like a banana.
The document notes that Professor Chao Li’s group at the Chinese Academy of Sciences successfully demonstrated a proof-of-concept of Chan’s theoretical work using a transmission-line simulator. This simulator operates at 51 MHz over a 10% bandwidth, showing practical progress in the field of metamaterials.
While the redacted portions limit the full understanding of the content, the disclosed information provides a glimpse into the ongoing advancements and international collaborations in the field of cloaking technology.
The document released can be downloaded below.
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This post was published on July 25, 2024 6:50 pm
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