Results 91 to 100 of about 3,712 (221)

Assessment of Vibration Frequencies of Piezo-Actuated Panel by Model-Assisted Self-Mixing Interferometry

open access: yesIEEE Open Journal of Instrumentation and Measurement
Flat surfaces driven by attached piezoelectric actuators are promising devices for the development of future generations of speakers. Although audio devices characterization requires sound pressure level measurements, preliminary testing of ...
E. Bodo   +4 more
doaj   +1 more source

Evolution and Conceptual Insights into the Geometric Phase of Light: A Comprehensive Review

open access: yesAdvanced Photonics Research, Volume 7, Issue 6, June 2026.
This review presents a unified account of the geometric phase of light, linking its fundamental principles to diverse manifestations in polarization, spatial, and vector modes. By connecting theoretical frameworks with key experimental realizations, it reveals a coherent physical picture that deepens understanding and stimulates new directions in ...
A. Srinivasa Rao
wiley   +1 more source

Dynamic holographic interferometry using a Bi12SiO20 photorefractive crystal and monomode optical fibres

open access: yes, 1993
Dynamic holographic interferometry using polarization preserving opticai fibres as light guides and incorporating a photorefractive Bi12SiO20 (BSO) crystal as the recording medium is described.
Potter, J, Spooncer, RC, Hobson, PR
core  

Laser Self-Mixing Fiber Bragg Grating Sensor for Acoustic Emission Measurement

open access: yesSensors, 2018
Fiber Bragg grating (FBG) is considered a good candidate for acoustic emission (AE) measurement. The sensing and measurement in traditional FBG-based AE systems are based on the variation in laser intensity induced by the Bragg wavelength shift.
Bin Liu   +6 more
doaj   +1 more source

De Novo Design and Directed Evolution Refinement of Mirror‐Image Protein Binders Targeting Interleukin‐4

open access: yesAdvanced Science, Volume 13, Issue 32, 9 June 2026.
This study presents the de novo design and directed evolution of a mirror‐image D‐protein inhibitor targeting human interleukin‐4 (IL‐4). The engineered molecule exhibits nanomolar binding affinity for IL‐4 and effectively inhibits IL‐4–mediated signaling.
Liqing Xu   +7 more
wiley   +1 more source

Cells Dynamically Adapt Their Nuclear Volumes and Proliferation Rates During Single to Multicellular Transitions

open access: yesAdvanced Science, Volume 13, Issue 31, 4 June 2026.
It is currently not well understood how cells regulate basic properties, e.g., volume and mechanics within dense multicellular environments like tumors. Here, we show that different cell types of cancer and also normal cells largely decrease their nuclear and cellular volumes in emerging cell clusters and that this is partly driven by cell cycle shifts.
Vaibhav Mahajan   +13 more
wiley   +1 more source

Self-Mixing Interferometry: a Universal Yardstick to Measure Almost Everything

open access: yes, 2011
Self-mixing interferometry (SMI) is a new scheme of interferometry having several advantages compared to standard configurations: it can work with no optical part external to the laser, is self-aligned, is immune to external stray light, and can ...
DONATI, SILVANO, MARTINI, GIUSEPPE
core  

Refractive index detection with self-mixing interferometry for biosensing applications

open access: yes, 2007
This paper presents a novel method for detecting a change in the refractive index of samples. One of its major applications is sensing molecular interaction in biological samples.
Määttälä, Miia   +4 more
core   +1 more source

Measurements of the linewidth enhancement factor of mid-infrared quantum cascade lasers by different optical feedback techniques

open access: yesAIP Advances, 2016
Precise knowledge of the linewidth enhancement factor of a semiconductor laser under actual operating conditions is of prime importance since this parameter dictates various phenomena such as linewidth broadening or optical nonlinearities enhancement ...
L. Jumpertz   +6 more
doaj   +1 more source

Stimuli‐Responsive Hydrogels for Optical Applications: Mechanisms, Architectures, and Translational Challenges

open access: yesAggregate, Volume 7, Issue 6, June 2026.
The review discusses stimuli‐responsive hydrogels as soft optical materials that translate physical, chemical, and biological cues into refractive‐index, scattering, birefringence, diffraction, and transparency changes. It examines major stimulus classes and photonic architectures for biosensing, waveguiding, adaptive lenses, smart windows, and therapy.
Andrés Bernal‐Ballén   +2 more
wiley   +1 more source

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