Results 51 to 60 of about 574,567 (291)

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

LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro

Molecular Oncology, EarlyView.
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix, Daniel Samaga, Katharina Gehr, Benedek Dankó, Mohamed Schumann, Guido Drexler, Ahmed Alnatsha, Georg Beyer, Ujjwal Mahajan, Martin Selmansberger, Julia Mayerle, Claus Belka, Horst Zitzelsberger, Kirsten Lauber   +13 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

Plecstatin inhibits hepatocellular carcinoma tumorigenesis and invasion through cytolinker plectin

Molecular Oncology, EarlyView.
The ruthenium‐based metallodrug plecstatin exerts its anticancer effect in hepatocellular carcinoma (HCC) primarily through selective targeting of plectin. By disrupting plectin‐mediated cytoskeletal organization, plecstatin inhibits anchorage‐dependent growth, cell polarization, and tumor cell dissemination.
Zuzana Outla, Jan Kosla, Magdalena Prechova, Lukas Frick, Patricia Bortel, Yasmin Borutzki, Andrea Bileck, Christopher Gerner, Samuel M. Meier‐Menches, Selma Osmanagic‐Myers, Martin Gregor   +10 more
wiley   +1 more source

Characterization of a circular optical nanoantenna by nonlinear photoemission electron microscopy

, 2015
We report on the investigation of an advanced circular plasmonic nanoantenna under ultrafast excitation using nonlinear photoemission electron microscopy (PEEM) under near-normal incidence.
Falkner, Matthias, Kaiser, Thomas, Klein, Angela, Menzel, Christoph, Pertsch, Thomas, Qi, Jing, Rockstuhl, Carsten, Steinert, Michael   +7 more
core   +1 more source

Pushing the limits of deep-ultraviolet scanning near-field optical microscopy

APL Photonics, 2019
Deep-ultraviolet (DUV) microscopy and microspectroscopy have received much attention in label-free live-cell imaging, selective molecular analysis, and optical characterizations of ultrawide bandgap materials.
Ryota Ishii, Mitsuru Funato, Yoichi Kawakami   +2 more
doaj   +1 more source

Therapeutic strategies for MMAE‐resistant bladder cancer through DPP4 inhibition

Molecular Oncology, EarlyView.
We established monomethyl auristatin E (MMAE)‐resistant bladder cancer (BC) cell lines by exposure to progressively increasing concentrations of MMAE in vitro. RNA sequencing showed DPP4 expression was increased in MMAE‐resistant BC cells. Both si‐DPP4 and the DPP4 inhibitor sitagliptin suppressed the viability of MMAE‐resistant BC cells.
Gang Li, Shuichi Tatarano, Hirofumi Yoshino, Saeki Saito, Mitsuhiko Tominaga, Junya Arima, Ikumi Fukuda, Takashi Sakaguchi, Ryosuke Matsushita, Yasutoshi Yamada, Hideki Enokida   +10 more
wiley   +1 more source

Determination of electric field, magnetic field, and electric current distributions of infrared optical antennas: A nano-optical vector network analyzer

, 2010
In addition to the electric field E(r), the associated magnetic field H(r) and current density J(r) characterize any electromagnetic device, providing insight into antenna coupling and mutual impedance.
Boreman, Glenn D., Krenz, Peter M., Lail, Brian A., Olmon, Robert L., Rang, Matthias, Raschke, Markus B., Saraf, Laxmikant V.   +6 more
core   +1 more source