Abstract-Terahertz-wave generation devices using electro-optic polymer slab waveguides and cyclo-olefin polymer clads

Takahiro Kaji, Yukihiro Tominari, Toshiki Yamada, Shingo Saito, Isao Morohashi, and Akira Otomo

Fig. 2 Schematic illustration of the experimental setup used for terahertz (THz) time-domain spectroscopy (THz-TDS). A pump beam was focused onto the EO polymer slab waveguide device using two orthogonally arranged cylindrical lenses (f = 100 mm and f = 12 mm). The double arrows show the polarization directions for the optical pulses. The inset shows the infrared optical microscope image of the end face of the EO polymer slab with a 1.56 μm pump.

https://www.osapublishing.org/oe/abstract.cfm?uri=oe-26-23-30466

We fabricated terahertz (THz) wave generation devices using electro-optic (EO) polymer slab waveguides and cyclo-olefin polymer (COP) clads with very small absorption loss of the THz waves based on a novel device fabrication procedure involving bonding of the poled EO polymer layer to the COP substrates. We demonstrated THz wave generation from the EO polymer slab devices using a 1.55 µm-band femtosecond fiber laser and evaluated the THz wave generation properties of the devices. Our results will lead to the development of compact, highly efficient, and ultrabroadband THz devices using EO polymers.

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