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Caltech Breakthrough: Laser-Propelled Light Sails Open New Era of Interstellar

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writing SEO-friendly blog content is‌ essential for improving your⁢ blog’s​ visibility, attracting organic traffic, and engaging your readers. By understanding the importance of keywords, crafting captivating headlines, structuring your blog articles for maximum ‌readability, and optimizing your content for search engine crawlers, you can significantly ‌enhance ⁣your blog’s performance.


Blog Formatting‌ Guide:⁢ Boost readability and SEO

To ⁣make the process of formatting ​your ‌blog posts more⁢ efficient and SEO-friendly, you​ can leverage various tools and plugins. These tools help with ​everything from ensuring proper structure and readability to optimizing ​your content for search ​engines.Let’s explore some of⁣ the instrumental steps toward lightsails that could reach‍ distant star systems.

Since⁤ 2016, Stephen Hawking and entrepreneur Yuri Milner took the​ lead in proposing “Breakthrough Starshot.” ⁢After the⁤ project, the light sail⁢ made of laser-driven and ultra-light materials has become a technological breakthrough to promote ‌humans to enter space. Hawking ‍and Milner want‍ to use powerful laser ‌thrust to allow the micro detector ⁤to fly to the closest stellar system of⁢ the Earth ‍at a speed close to the speed of‌ light. Now the ⁢caltech team uses ⁤advanced experimental equipment⁣ and nanotechnology to gradually realize this grand blueprint.

Led by Professor ⁢Harry Atwater, ⁣the team carefully ​measured the reaction of ultra-thin ‌materials ‌under external​ radiation pressure. The ​specially⁤ made​ micro “light sail” is composed of a 50-nanometer thick‍ silicon nitride film, with a size of only about 40×40 microns, and the four corners are connected by micro springs made of the ‍same material, just ⁢like a micro ​trampoline ​(pictured below).The team used electron beam micrographs to complete the film production at the Kavli Nano ​Science Institute and experimented ​with ⁤argon‍ laser in the visible‌ light band⁣ in​ the vacuum cavity.


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In order to accurately capture extremely small⁤ forces,‌ the researchers built ⁣a common rail ​interferometer system. This innovative technology can effectively eliminate environmental‍ noise, accurately measure the⁣ fine displacements up and down of the⁤ metered sail (up ‌to ‌the picometer level), and calculate ⁤the mechanical ‍changes of laser‍ radiation⁤ pressure ⁤on the light ⁢sail. When the light rod illuminates the light sail at ‌different angles,the edge scattering effect⁣ causes part of the laser ‌energy to ⁢deviate from the predetermined⁢ direction,and the actual pushing force is ⁣lowered than when the front is illuminated.

The experiment not only successfully measured the⁣ light thrust (the ‍force reaches the⁢ femtonewton level), but also ‍pioneered the use of the equipment as a success rate meter⁣ to directly measure the laser power. The team⁤ pointed out that in the future, nano science and metamaterial technology will ⁤be used⁢ to design light sails that can automatically restore the⁤ correct position when disturbed by lateral or rotating forces to maintain long-distance flight stability.

the ‌results were published in the journal Nature Photonics and are regarded ‍as an critically‍ important ‍milestone‌ in moving from theoretical exploration to practical request. Caltech team said that ⁤this experiment will help‌ solve the thermal‍ energy,pressure ​and ⁤positioning problems that the light‍ sail may face ‌in the actual space habitat,and also provide a‌ key reference for the future⁢ design of ultra-high-speed and interstellar probe propulsion systems.

If new technologies gradually mature, humans will no longer ⁢just‌ dreams ⁣to explore the interstellar ‍world that is ‌only observed by telescopes. From science ⁢fiction to reality, laser propulsion light sails are‌ steadily, opening a new chapter of space exploration.

(First photo source: ⁢Breakthrough Starshot)

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New Technology, Updated ‌at Any Time

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