News & Events

 

Congratulations to our colleague and best wishes for success in the new scientific phase!

 

This research explores how to design and develop diffractive optical elements that work in the terahertz (THz) frequency range. The work focuses on beam shaping, beam focusing and controlling the polarization of THz radiation, which is useful for applications like high-speed wireless communication, imaging, and sensing.

 

 

 

“Three key types of diffractive optical elements were developed based on semiconductor- and metal-based materials which are multi-phase zone plate lenses for focusing, high-contrast grating waveplates for polarization control, and meta-surfaces (ultra-thin structures with unique light-manipulating properties).

 

The most satisfying part is that these elements perform very well across a wide range of THz frequencies, which is rare for diffractive optics. The designs are also practical and could be produced more easily, helping future THz devices become more compact and efficient,“ says Surya.

 

 

 

According to the physicist, the wafers, lenses and metasurfaces he has developed will hopefully be useful in advancing these technologies that are relevant to us all:

 

High-speed wireless communications. THz waves could allow data transmission rates much faster than today's 5G, and these lenses and waveplates could be used in THz antennas or signal processors.

 

Security and medical imaging. THz imaging is non-invasive and can detect objects through materials like clothing or packaging. These optical elements could make THz scanners more efficient and affordable.

 

Miniaturized sensors and chips. The elements developed are flat, lightweight, and can be integrated on chips, making them perfect for on-chip optics, essential in electronics and sensing technologies.

 

Industrial quality control. THz sensing can detect defects inside materials without damaging them. These devices could enhance precision in such tools.