Results 81 to 90 of about 5,555 (236)

Dispersive X‐ray absorption spectroscopy using independent grazing‐incidence focusing and convexly bent Bragg‐crystal dispersing optics

Journal of Synchrotron Radiation, Volume 32, Issue 4, Page 1068-1084, July 2025.
A dispersive X‐ray absorption spectroscopy instrument has been developed and implemented at the Advanced Photon Source's Advanced Spectroscopy Beamline. The instrument uses a convexly bent Bragg‐crystal analyzer to disperse a polychromatic X‐ray beam and independent Kirkpatrick–Baez mirrors for focusing, thereby providing a simple and flexible method ...
Juanjuan Huang, Adam P. Tornheim, Xianbo Shi, Mark Wolfman, Yanna Chen, Steve M. Heald, Shelly D. Kelly, George E. Sterbinsky   +7 more
wiley   +1 more source

Active stabilization of a Michelson interferometer at an arbitrary phase with sub-nm resolution

, 2013
We report on the active stabilization of a Michelson interferometer at an arbitrary phase angle with a precision better than one degree at $\lambda = 632.8$ nm, which corresponds to an optical path difference between the two arms of less than 1 nm.
Bajoni, Daniele, Galli, Matteo, Grassani, Davide   +2 more
core   +1 more source

Stacking-symmetry governed second harmonic generation in graphene trilayers [PDF]

, 2018
Crystal symmetry plays a central role in governing a wide range of fundamental physical phenomena. One example is the nonlinear optical second harmonic generation (SHG), which requires inversion symmetry breaking. Here we report a unique stacking-induced
Huang, Di, Li, Yingguo, Liu, Wei-Tao, Shan, Yuwei, Tong, Qingjun, Wu, Shiwei, Yao, Wang   +6 more
core   +2 more sources

Multimodal Purcell enhancement and optical coherence of Eu3+ ions in a single nanoparticle coupled to a microcavity

Nanophotonics, Volume 14, Issue 11, Page 1817-1826, June 2025.
Abstract Europium‐doped nanocrystals constitute a promising material for a scalable future quantum computing platform. Long‐lived nuclear spin states could serve as qubits addressed via coherent optical transitions. In order to realize an efficient spin‐photon interface, we couple the emission from a single nanoparticle to a fiber‐based microcavity ...
Timon Eichhorn, Nicholas Jobbitt, Sören Bieling, Shuping Liu, Tobias Krom, Diana Serrano, Robert Huber, Ulrich Lemmer, Hugues de Riedmatten, Philippe Goldner, David Hunger   +10 more
wiley   +1 more source

Micro-displacement sensors based on plastic photonic bandgap Bragg fibers

, 2013
We demonstrate an amplitude-based micro-displacement sensor that uses a plastic photonic bandgap Bragg fiber with one end coated with a silver layer. The reflection intensity of the Bragg fiber is characterized in response to different displacements (or ...
Bergeron, F., Brastaviceanu, T., Olesik, J., Pavlov, I., Qu, H., Skorobogatiy, Maksim A.   +5 more
core   +1 more source

Smart Polymeric 3D Microscaffolds Hosting Spheroids for Neuronal Research via Quantum Metrology

Advanced Healthcare Materials, Volume 14, Issue 7, March 14, 2025.
Development of a platform consisting of 3D microscaffolds supporting 3D embryoid bodies for neuronal research. The polymeric scaffolds enable directed growth of neurites. This study shows nanodiamond‐based quantum sensors graft onto the polymer material, enabling quantum metrology experiments within the 3D neuronal model and thereby providing a ...
Beatriz N. L. Costa, Ana Marote, Catarina Barbosa, Jonas Campos, António J. Salgado, Jana B. Nieder   +5 more
wiley   +1 more source

Development of 3D Force Sensors for Nanopositioning and Nanomeasuring Machine

Sensors, 2009
In this contribution, we report on different miniaturized bulk micro machined three-axes piezoresistive force sensors for nanopositioning and nanomeasuring machine (NPMM).
Arti Tibrewala, Norbert Hofmann, Anurak Phataralaoha, Gerd Jäger, Stephanus Büttgenbach   +4 more
doaj   +1 more source

Encapsulation of a fiber taper coupled microtoroid resonator in a polymer matrix

, 2013
We encapsulated a high-quality (Q) factor optical whispering gallery mode (WGM) microtoroid resonator together with its side coupled fiber taper inside a low refractive index polymer, achieving a final Q higher than 10^7.
Friedlein, Jacob, Monifi, Faraz, Ozdemir, Sahin Kaya, Yang, Lan   +3 more
core   +1 more source

A novel actuator-internal micro/nano positioning stage with an arch-shape bridge type amplifier [PDF]

, 2019
This paper presents a novel actuator-internal two degree-of-freedom (2-DOF) micro/nano positioning stage actuated by piezoelectric (PZT) actuators, which can be used as a fine actuation part in dual-stage system.
Huo, Zhichen, Liang, Cunman, Shi, Beichao, Tian, Yanling, Wang, Fujun, Zhang, Dawei, Zhao, Xingyu   +6 more
core   +1 more source

Transient Absorption Microscopy Maps Spatial Heterogeneity and Distinct Chemical Environments in Photocatalytic Carbon Nitride Particles

Small, Volume 21, Issue 5, February 5, 2025.
The complex charge carrier dynamics of promising carbon nitride photocatalysts make optimization challenging. Here spatial heterogeneity is discovered using transient absorption microscopy on carbon nitride particles from the same synthetic batch. This indicates that there are at least two distinct defect types that control the charge carrier dynamics,
Sutripto Khasnabis, Robert Godin
wiley   +1 more source