THz Domain

Linear THz interaction

THz radiation is the wavelength domain between radio waves and optics with frequencies from 100 GHz to 10 THz. Due to the large wavelenth (few mm) resonators can be manufactured with very well defined spectra. This allows for a straight forward study of coupling of spectrally identical resonators Optics Express 2014, also called photonic molecules. High quality resonances can still be achieved even if a small hole is punched into the resonator Optics Express 2013. In order to couple efficiently into WGM resonators dielectric rod can be used IEEE 2015.

We now teamed up Dr Dominik Vogt from the Dodd-Walls Centre in Auckland and investigated prism coupling in the THz regime Optics Letters (2018). We could also show that our theoretical predictions that whispering gallery modes can experience a blue shift in their frequency if a dielectric substrate is brought into close proximity Optics Letters (2019)

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Harald G. L. Schwefel
Associate Professor

I work on Resonant Optics.