@inproceedings{discovery10053890, note = {This is the published version of record. For information on re-use, please refer to the publisher's terms and conditions.}, volume = {10540}, editor = {M Razeghi and GJ Brown and JS Lewis and G Leo}, booktitle = {Quantum Sensing and Nano Electronics and Photonics XV}, pages = {1054020:1--1054020:7}, month = {January}, series = {Proceedings of SPIE}, journal = {Proceedings of SPIE - The International Society for Optical Engineering}, title = {Resonant scattering probes for terahertz near-field microscopy}, year = {2018}, publisher = {Society of Photo-Optical Instrumentation Engineers (SPIE)}, issn = {1996-756X}, author = {Siday, T and Natrella, M and Wu, J and Liu, H and Mitrofanov, O}, abstract = {We propose and demonstrate a scattering-type near-field probe, designed to increase the sensitivity of high-resolution scattering probe microscopy at terahertz (THz) frequencies. For efficient scattering of THz radiation, the probe, fabricated from indium, is designed to resonate like a dipole antenna. Efficient excitation is achieved by integrating the probe with a radially-polarized THz source. Using time-domain spectroscopy (TDS), we observe resonant enhancement of the scattered fields, and using aperture-type near-field microscopy, we see high field confinement at the scattering probe apex.}, url = {https://doi.org/10.1117/12.2290903} }