I wish to understand whether it is possible to make a phonon mode resonate with an externally applied signal in a lab, and whether a laser can be used for the purpose (if not, is there any other source that will do the job?).
Dear Sourabh Lahiri , yes, it is indeed possible to couple a phonon mode with an electromagnetic wave, to create a sort of hybrid quasiparticle called polariton.
Rigorously speaking a polariton is a quantum superposition state between a photon and a matter excitation. The matter excitation can be a collective mode (a phonon) in solids or an electron in atoms or molecules.
https://en.wikipedia.org/wiki/Polariton
https://www.nature.com/subjects/polaritons
"Polaritons are hybrid particles made up of a photon strongly coupled to an electric dipole. Examples of such a dipole include an electron–hole pair in a semiconductor, which forms an exciton polariton, and the oscillating electrons at the surface of a metal, which creates a surface-plasmon polariton."
A good description of different polaritons can be found in the following article and review, please have a look to them:
https://iopscience.iop.org/article/10.1088/1742-6596/865/1/012007/pdf
https://www.degruyter.com/document/doi/10.1515/nanoph-2020-0449/html
Polaritons are also fairly well described on the book by Le Ru and Etchegoin:
https://www.sciencedirect.com/book/9780444527790/principles-of-surface-enhanced-raman-spectroscopy
Hope this helps. Good luck with your research work and my best wishes.
Dear Manuel Gómez , thanks a lot for the detailed answer and the references. The concept of polaritons will definitely be very helpful for my work.
Dear Sourabh Lahiri , you´re welcome. Glad to know it´ll be useful for you!
Best regards,
Manuel
- Badges
- Science topic
- Similar topics
- Mathematical Sciences
- Graphs