منابع مشابه
Spectroscopic THz near-field microscope.
We demonstrate a scattering-type scanning near-field optical microscope (s-SNOM) with broadband THz illumination. A cantilevered W tip is used in tapping AFM mode. The direct scattering spectrum is obtained and optimized by asynchronous optical sampling (ASOPS), while near-field scattering is observed by using a space-domain delay stage and harmonic demodulation of the detector signal. True nea...
متن کاملNear-field microscopy of spontaneous THz radiaion
We have developed a THz near-field microscope with an ultrahighly sensitive detector, CSIP (charge-sensitive infrared phototransistor). In our microscope, scattered photons by a tungsten probe are collected by an objective of a confocal THz microscope and are finally detected by the CSIP. To suppress the far-field background, the probe vertically modulated and the signal is demodulated the sign...
متن کاملCompressed sensing with near-field THz radiation
RAYKO I. STANTCHEV,* DAVID B. PHILLIPS, PETER HOBSON, SAMUEL M. HORNETT, MILES J. PADGETT, AND EUAN HENDRY School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, UK SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, UK QinetiQ Limited, Cody Technology Park, Ively Road, Farnborough GU14 0LX, UK e-mail: [email protected] *Corresponding author: ris20...
متن کاملStrong near field enhancement in THz nano-antenna arrays
A key issue in modern photonics is the ability to concentrate light into very small volumes, thus enhancing its interaction with quantum objects of sizes much smaller than the wavelength. In the microwave domain, for many years this task has been successfully performed by antennas, built from metals that can be considered almost perfect at these frequencies. Antenna-like concepts have been rece...
متن کاملCollection-Mode Near-Field Imaging With 0.5-THz Pulses
High spatial resolution imaging with terahertz pulses is implemented with a novel collection-mode near-field probe. The spatial resolution capabilities of the system are in the range of few micrometers. We demonstrate resolution of 7 m using 0.5-THz pulses and discuss performance of the collection-mode near-field probes and image properties.
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ژورنال
عنوان ژورنال: Optics Express
سال: 2019
ISSN: 1094-4087
DOI: 10.1364/oe.27.028036