Light at the start of the 21st century tunnel
PhD student Atiyeh Zarifi provides some insights into her exciting photonics research and its applications.
PhD student Atiyeh Zarifi (right) with her supervisor Dr Birgit Stiller in their photonics lab. Photo: Jayne Ion.
is working at the nexus between physics and engineering, undertaking a PhD in photonics at the (CUDOS) in the , under the supervision of and .
鈥淧hotonics is the science and technology of generating, controlling, and detecting photons, which are particles of light.
鈥淭his area of research has critical applications for the way we build the future,鈥� said Atiyeh.
The 21st century will depend as much on photonic integrated circuits as the 20th century depended on electronic circuits.
Atiyeh Zarifi. Photo: Jayne Ion.
鈥淚n my research, I look at the interaction between photons and phonons. Photons represent units of light, and phonons are units of vibrational motions in a lattice.
鈥淭he frequency in which phonons vibrate, or the energy of the phonon, depends on the lattice properties. A high energy photon can induce vibration in a material, which means it can generate phonons. The high energy photon loses part of its energy and is scattered in a backwards direction. This scattered photon can reveal information about lattice properties of the material. This process is called stimulated Brillouin scattering (SBS) and this is the core of my research.
鈥淚 use this phenomenon to study tiny structures called photonics waveguides, which are 1000 times thinner than a human hair. Similar to their electronic chip counterparts, which guide electrons, these waveguides 鈥� called photonic integrated circuits 鈥� are used to guide light.
鈥淭he 21st century will depend as much on photonic integrated circuits as the 20th century depended on electronic circuits,鈥� she said.
Atiyeh is applying the SBS principle on waveguides to learn about their geometry as well as environmental properties such as temperature and mechanical strain.
鈥淲e can use SBS for sensing tiny vibrations in critical metropolitan structures such as bridges and high rises,鈥� Atiyeh said.
Her work is addressing some of our everyday engineering challenges.
鈥淕aining insights into this movement could allow us to make buildings and structures more stable in the future or to even improve their current structure.
鈥淎t CUDOS, we are working on optical science and photonics technology to bring significant advancement in the capabilities in this crucial field.
鈥淚t has been an amazing opportunity for me to work in this , interacting with top researchers in the field,鈥� said Atiyeh.
These inspiring researchers include Professor Ben Eggleton and , who recently presented the illuminating Sydney Science Forum, .听
