The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We propose a novel method for establishing and aligning a THz ellipsometry system and for calibrating ellipsometry signals for precise THz ellipsometry measurements. The method significantly improves the THz ellipsometry accuracy compared to the current publications.
The water diffusivity of occluded human stratum corneum (SC) is estimated by standard terahertz reflection spectroscopy and a SC swelling diffusion model. We find that the water diffusivity in occluded skin is higher than that in steady state at the onset of occlusion. This method is potentially useful for non-invasive diagnosis of human skin conditions.
We propose a novel reference-acquisition method that provides precise phase alignment for terahertz imaging. The method significantly improves the accuracy of the extracted sample optical properties and greatly improves the experimental efficiency compared to traditional reference methods.
We have experimentally realized a broadband THz modulator in a total internal reflection geometry using SiO2/Si gated monolayer graphene. The modulation depth in our device is up to 83% over the range of 0.2–0.6 THz, and can be further improved by extending the size of our modulator and using multiple reflections.
In this paper we show how the act of measuring skin in vivo using a standard terahertz reflection imaging system affects the terahertz response. We found that even 5 seconds occlusion by the imaging window caused subtle changes in the THz response. As the occlusion time increases, the skin's surface water content increases which causes the refractive index of the skin to increase. This in turn leads...
For ex vivo biological imaging, sample handling can affect image contrast. We investigate the effects of the slow freeze-thaw cycle on the THz properties of porcine lean and fat tissues. Lean tissues showed a significant decrease in the refractive index after the freeze-thaw cycle while there was no significant change observed in THz properties of fat tissues.
Osteoarthritis (OA) is the most common form of arthritis, caused by the breakdown of cartilage. A quantitative approach to monitor articular cartilage is a pressing need. Here, using a rabbit model, we investigate the potential use of terahertz pulsed imaging to determine the variation in cartilage thickness due to OA. We find that our terahertz image data can be used to quantitatively show variation...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.