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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
Imaging Biological Samples with Optical Microscopy01:18

Imaging Biological Samples with Optical Microscopy

Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
Light as Energy01:35

Light as Energy

The energy required to carry out photosynthesis is light— typically electromagnetic radiation from the sun. The range of all possible wavelengths is known as the electromagnetic spectrum.
Photons
A photon is a discrete electromagnetic particle or bundle of energy. Photons are characterized by their frequency, wavelength, and amplitude, similar to the properties of a wave. Waves with higher frequencies transmit more energy and have shorter wavelengths than longer wavelengths that transmit less...
Confocal Fluorescence Microscopy01:16

Confocal Fluorescence Microscopy

Confocal microscopy is an advanced microscopic technique. The prime advantage of the confocal microscope over other microscopy techniques is its ability to block the out-of-focus light from the illuminated samples using pinholes. It is widely used with fluorescence optics to obtain high-resolution, sharp contrast images. Unlike optical microscopes, confocal microscopes use a focused beam of light laser to scan the entire sample surface at different z-planes. These microscopes are, therefore,...

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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Photonics for life.

Rinaldo Cubeddu, Andrea Bassi, Daniela Comelli

    IEEE Pulse
    |June 7, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Biophotonics leverages light-based technologies for advanced biomedical applications. This review highlights cutting-edge research in photonics for diagnostics and therapeutics, showcasing its vital role in modern medicine.

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    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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    Photostimulation by Femtosecond Laser Activates Extracellular-signal-regulated Kinase (ERK) Signaling or Mitochondrial Events in Target Cells
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    Fluorescence Lifetime Macro Imager for Biomedical Applications
    06:01

    Fluorescence Lifetime Macro Imager for Biomedical Applications

    Published on: April 7, 2023

    Area of Science:

    • Biophotonics
    • Biomedical Optics
    • Photonics in Medicine

    Background:

    • Light is fundamental to life, influencing biological mechanisms.
    • Optics and laser discoveries have revolutionized biomedical diagnostics and therapeutics.
    • Photonics encompasses light-based technologies across various wavelengths.

    Purpose of the Study:

    • To review the state-of-the-art in biomedical research at Politecnico.
    • To highlight advancements in biophotonics and its applications.
    • To showcase the interdisciplinary nature of photonics in medicine.

    Main Methods:

    • Review of current biophotonics research and applications.
    • Analysis of photonics technologies in biomedical fields.
    • Exploration of interdisciplinary contributions from physics, chemistry, and electronics.

    Main Results:

    • Photonics offers low-cost, compact, and efficient devices for biomedical use.
    • Advancements in photonics are driving innovation in medical diagnostics and therapies.
    • Interdisciplinary research is crucial for translating photonics into clinical practice.

    Conclusions:

    • Biophotonics is a rapidly advancing field with significant potential in medicine.
    • The integration of photonics technologies enhances biomedical capabilities.
    • Continued interdisciplinary collaboration is key to future biophotonics innovations.