THz generation in silicon photonics

Silicon waveguides functionalized with non-linear organic cladding material are a versatile integrated platform to provide long-range interaction of high-intensity confined light with non-linear material. We show that such waveguides can be utilized for high efficiency, integrated and compact THz sources. The concept is based on non-linear frequency mixing of two near infrared (NIR) modes guided in the same silicon waveguide that is cladded with non-linear organic polymers. Such materials can be well combined the with silicon photonic platform. In the non-linear cladding material, evanescent fields of the two NIR modes mix and produce the difference frequency which can be tuned to any frequency in the 1-10 THz range. This unique property makes such integrated THz sources suitable for applications in THz spectroscopy and THz imaging.

Publikationen

• J. Hoffmann, K.M. Schulz, G. Pitruzzello, L.S. Fohrmann, A.Y. Petrov, and M. Eich: Backscattering design for a focusing grating coupler with fully etched slots for transverse magnetic modes. Scientific Reports, 8: S. 17746, 2018.
• K.M. Schulz, Rusche, A. G. C., A.Y. Petrov, and M. Eich: Integrated nonlinear waveguide optics for high-efficiency and wideband-tunable generation of THz radiation. ACS Photonics, 5: S. 3779–3787, 2018.
• K.M. Schulz, D. Jalas, A.Y. Petrov, and M. Eich: Reciprocity approach for calculating the Purcell effect for emission into an open optical system. Optics Express, 26: S. 19247–19258, 2018.
• D. Jalas, K.M. Schulz, A.Y. Petrov, and M. Eich: Emission enhancement in dielectric nanocomposites. Optics Express, 26: S. 16352–16364, 2018.