Optoelectronic Devices and the Future

 


Researchers were taking pictures with the high-speed electron camera at the department of energy’s  SLAC national acceleratory laboratory And discovered a new behavior in a super thin material.

It offers a hopeful approach to controlling light that will be useful for devices that detect, control or emit light. 

These devices are called optoelectronic devices and researchers are Investigating how light is polarized inside its material. Optical electronic devices include LEDs, optical fibers, and its even used in medical imaging.

Reported in Nano Letters that The team is being led by SLC Professor Aron Lindenberg. He discovered that when orientated in a specific direction and subjected to Terahertz radiation and an ultra thin layer of tungsten ditelluride (it has properties for polarizing light)- it circularly  polarized the incoming light! 

Capturing a material’s behavior under Terahertz light requires a high-tech instrument recording at super fast speeds, and SLAC’s  world leading instrument for ultrafast electron diffraction (MeV-UED) at the Linac Coherent Light Source can do it! 

The MeV-UED Is typically used to visualize the motion of atoms. It measures how they scatter electrons after hitting a sample with an electron beam. This new research used the femtosecond electron pulses To visualize the electric and magnetic field of the incoming terahertz pulses. It causes the electrons to wiggle back-and-forth! 

Scientists continue to study nanoscale materials, making optoelectronic devices smaller and capable of even more functions in the future! 

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