A programmable wireless device can precisely control the direction of light beams at unprecedented speeds to generate realistic, dynamic holograms, and in the case of a 3D hologram, based on liquid crystals or micromirrors for its manufacturing process to be precise and fast Light control is required.
A group of MIT researchers has been tackling the challenge of high-speed optical beamforming for four years and recently invented it. A programmable wireless device that can control lighting,
Known as the ‘Space Light Modulator’ (SLM), such innovation can be used to build super-fast lidar sensors, generate high-resolution images, and manipulate light by controlling its emission properties.
Christopher Panuski (lead author of the project) indicates in a statement that “we are focusing on the control of light, which has been a recurring research topic since ancient times. Our development is another important step towards the ultimate goal of a step. full optical controlfor myriad applications that harness light, both in space and time”.
Inside the SLM, a two-dimensional array of optical modulators modulates the light, but the wavelengths are a few nanometers, so to precisely control the light at high speeds, Device requires dense array of nanoscale drivers, Faced with this situation, the researchers used a series of photonic crystal microcavities to achieve the objective.
When light enters a cavity, it lasts for about a nanosecond and bounces more than 100,000 times before leaking out into space, but by changing a cavity’s reflectivity, researchers can control how light escapes. Is. To achieve the goal, the researchers developed An algorithm that designs photonic crystal devices which turns the light into a narrow beam as it leaves each cavity.
According to the statement, the researchers Micro-LED screen used to control the SLM, The LED pixels were aligned with the photonic crystal on the silicon chip, and when a laser hit the active microcavity, the cavity responded differently to the laser depending on the light from the LED.
Means to use the LED to control the device The matrix is programmable, reconfigurable and wireless, The SLM demonstrated nearly perfect control over both space and time, and now that they’ve perfected the manufacturing process, researchers are building larger instruments Quantum control and ultrafast image detection.
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