Results 41 to 50 of about 10,023,443 (259)

Fiber-top and ferrule-top cantilevers for atomic force microscopy and scanning near field optical microscopy

, 2012
Fiber-top and ferrule-top cantilevers (FTC) are a new generation of all optical, monolithic, self-aligned microdevices. They are obtained by carving a cantilever on the cleaved end of an optical fiber (fiber-top) or on a ferrule terminated fiber (ferrule-
Grzegorz Gruca, Bruno Tiribilli, Martin Slaman, Giancarlo Margheri, van de Watering, T.C., Davide Iannuzzi, Rector, J.H., Kier Heeck, Dieter Andres, Jan Rector, Chavan, D.C., Slaman, M.J., Tomek van de Watering, Heeck, K., Tiribilli, B, Gruca, G.L., Iannuzzi, D., Dhwajal Chavan, Andres, D, Margheri, G   +19 more
core   +1 more source

Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]

, 2014
A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier, Martinez, R, Sharma, A, Batchelor, John C., Garcia Zuazola, Ignacio Julio, de-Haro Ariet, L   +5 more
core   +1 more source

Near-field transmission matrix microscopy for mapping high-order eigenmodes of subwavelength nanostructures

Nature Communications, 2020
Nanoscale integrated photonic devices have complicated combinations of optical eigenmodes. Here, the authors develop a far- to near-field transmission matrix microscopy that enables measuring higher-order modes of nanostructures beyond the capabilities ...
Eunsung Seo, Young-Ho Jin, Wonjun Choi, Yonghyeon Jo, Suyeon Lee, Kyung-Deok Song, Joonmo Ahn, Q.-Han Park, Myung-Ki Kim, Wonshik Choi   +9 more
doaj   +1 more source

Liver organoids: modelling complexity in homeostasis and disease

FEBS Letters, EarlyView.
Studying liver in vitro has been challenging because simple 2D cell cultures fail to capture liver's cellular and architectural complexity. To bridge this gap, scientists increasingly use organoids, 3D liver models which better mimic liver composition and function. This review examines recent advances in liver organoid complexity and realism, discusses
Anna M. Dowbaj, Meritxell Huch
wiley   +1 more source

Precision Optical Measurements of DNA Structure and Synthesis [PDF]

, 2007
The structure and synthesis of DNA is important. Traditionally,high-resolution structures are solved with X-ray crystallography, and kinetic measurements are taken with consumption of large amount of reagents.
Ziyang Ma, Ma, Ziyang
core   +1 more source

Time‐Domain Near‐Field Scanning Microscopy of Terahertz Metasurfaces

Advanced Photonics Research
Metasurfaces have emerged as an ultrathin, versatile method for manipulating terahertz surface plasma waves that are critical for subwavelength optical control but are very challenging to be excited and characterized. This review presents recent advances
Ruxue Wei, Soren Petersen, Weili Zhang
doaj   +1 more source

Numerical Analysis of Localized Electric Field Enhancement in Apertureless Near Field Optical Microscopy

IEEE Photonics Journal
In this work, we investigate the effects of two distinct physical mechanisms, the antenna effect and plasmon resonance, on electric field enhancement in representative geometrical structures and at the apex of a sharp tip.
Ayushman Ramola, Amit Kumar Shakya, Yarden Mazor, Nezah Balal, Arik Bergman   +4 more
doaj   +1 more source

High-resolution photocurrent microscopy using near-field cathodoluminescence of quantum dots

AIP Advances, 2013
We report a fast, versatile photocurrent imaging technique to visualize the local photo response of solar energy devices and optoelectronics using near-field cathodoluminescence (CL) from a homogeneous quantum dot layer.
Heayoung P. Yoon, Youngmin Lee, Christopher D. Bohn, Seung-Hyeon Ko, Anthony G. Gianfrancesco, Jonathan S. Steckel, Seth Coe-Sullivan, A. Alec Talin, Nikolai B. Zhitenev   +8 more
doaj   +1 more source

Autophagy and mitophagy in pancreatic β‐cell homeostasis and their involvement in diabetes pathophysiology

FEBS Letters, EarlyView.
This review focuses on the role of autophagy and mitophagy in maintaining pancreatic β‐cell function and homeostasis. We discuss how genetic defects affecting these pathways contribute to the development of type 1, type 2, monogenic, and gestational diabetes. We further explore their potential as therapeutic targets. Created in BioRender.
Yunkyeong Lee, Mingming Tong, Anna L. Gloyn   +2 more
wiley   +1 more source

Optimization of s-Polarization Sensitivity in Apertureless Near-Field Optical Microscopy

International Journal of Optics, 2012
It is a general belief in apertureless near-field microscopy that the so-called p-polarization configuration, where the incident light is polarized parallel to the axis of the probe, is advantageous to its counterpart, the s-polarization configuration ...
Yuika Saito, Yoshiro Ohashi, Prabhat Verma   +2 more
doaj   +1 more source