Optical Probe Waves
Optical Probe Waves - Related Videos
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
0 Views •
Cited by 13 •
2014
We describe the reliable generation of non-Gaussian states of traveling optical fields, including single-photon states and coherent state superpositions, using a conditional preparation method operated on the non-classical light emitted by optical parametric oscillators. Type-I and type-II phase-matched oscillators are considered and common procedures, such as the required frequency filtering or the high-efficiency quantum state characterization by homodyning, are detailed.
09:35
Attaching Biological Probes to Silica Optical Biosensors Using Silane Coupling Agents
0 Views •
Cited by 13 •
2012
Biosensors interface with complex, biological environments and perform targeted detection by combining highly sensitive sensors with highly specific probes attached to the sensor via surface modification. Here, we demonstrate the surface functionalization of silica optical sensors with biotin using silane coupling agents to bridge the sensor and the biological environment.
11:21
Photoconversion of Purified Fluorescent Proteins and Dual-probe Optical Highlighting in Live Cells
0 Views •
Cited by 5 •
2010
This protocol describes a general approach to perform photoconversion of fluorescent proteins on a confocal laser scanning microscope. We describe procedures for the photoconversion of puried protein samples, as well as for dual-probe optical highlighting in live cells with mOrange2 and Dronpa.
13:58
Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
0 Views •
Cited by 1 •
2016
This paper reports the nanomaterial fabrication of a fullerene Si substrate inspected and verified by nanomeasurements and molecular dynamic simulation.
09:39
Optical Biosensing
0 Views •
2023
Optical biosensors utilize light to detect the binding of a target molecule. These sensors can utilize a label molecule, which produces a measurable signal such as fluorescence, or these sensors can be label-free and use the changes in optical properties, such as refractive index, to sense for the binding of the target molecule. This video introduces both label and label-free optical biosensors, demonstrates their use in the laboratory, and shows some applications of the technology.
FAQs
Information is encoded when a controlled wave interacts with the target and changes through propagation, reflection, transmission, scattering, or interference. Engineers examine resulting variations in intensity, phase, wavelength, or polarization. Because these quantities respond to geometry, composition, temperature, and strain, the measured optical signal can indicate which physical properties have changed without directly disturbing the target.
Each optical quantity can provide a different representation of the target’s response. Intensity tracks changes in signal strength, while phase describes the wave’s relative progression. Wavelength and polarization offer additional ways to distinguish interactions associated with material or environmental conditions. Selecting the relevant channel helps engineers match the measurement to the property being examined and the required sensing outcome.
These interaction pathways determine how information reaches the measurement system. Reflection returns wave information from a target, transmission carries information through it, scattering redirects information from the interaction region, and interference combines waves so changes can be observed through their relationship. Engineers analyze the resulting signals to support sensing, imaging, spectroscopy, or nondestructive testing.
The observable response depends on which target property affects the wave and which optical quantity is analyzed. Geometry, composition, temperature, and strain can produce different changes in intensity, phase, wavelength, or polarization. The measurement approach must therefore align the wave interaction and signal analysis with the property of interest, especially when precise or spatially resolved engineering information is required.
A typical workflow directs a controlled light wave toward or through the material, device, or environment, then collects the resulting optical response. Photodetectors convert that response into measurable signals, and signal-processing methods analyze changes in intensity, phase, wavelength, or polarization. The processed result can then support sensing, imaging, spectroscopy, metrology, or nondestructive evaluation.
They are useful when measurements must be rapid, remote, and minimally disturbing. Engineering applications include fiber-optic monitoring, semiconductor inspection, structural-health assessment, and metrology. The same approach can examine materials, devices, or environments while providing information about properties such as geometry, composition, temperature, or strain, making it suitable for both observation and nondestructive testing.
For structural-health assessment, engineers can analyze optical changes associated with strain or temperature to obtain information about a structure without directly disturbing it. In semiconductor inspection, the response of light to device geometry or composition can be examined. These applications use photodetection and signal processing to convert optical interactions into engineering measurements with high spatial or temporal resolution.