Sub-wavelength continuous THz imaging system based on interferometric detection

We have developed a continuous wave sub-wavelength terahertz (THz) imaging system that combines two prominent classical optical techniques: solid immersion microscopy and interferometric detection. This combination allows for resolution beyond the diffraction limit at 703 GHz. We experimentally demonstrate sub-wavelength spatial resolution working with a relatively low-cost pyroelectric detector and with both high and low contrast samples. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Automated summary

This study presents a sub-wavelength terahertz imaging system that combines solid immersion microscopy and interferometric detection, achieving resolution beyond the diffraction limit at 703 GHz. Experimental results show that sub-wavelength spatial resolution can be achieved using a relatively low-cost pyroelectric detector with both high and low contrast samples. The system has potential for various applications in imaging and microscopy.