The technology of producing and utilizing light and other types of radiant energy whose quantum unit is the photon. Applications of photonics expand from power generation to recognition of communications and handling of information.

2. Introduction
The science of photonics includes the
generation, emission, transmission,
modulation, signal processing, switching,
amplification, and detection/sensing of
light. The term photonics thereby
emphasizes that photons are neither
particles nor waves they have both particle
and wave nature.

3. Applications
Applications of photonics
are ubiquitous. Included are
all areas from everyday life
to the most advanced
science, e.g. light detection,
telecommunications,
information processing,
lighting, metrology,
spectroscopy, holography,
medicine, military
technology, laser material
processing, visual art,
biophotonics, agriculture,
and robotics.

4. Overview of Photonics
The science of photonics
includes investigation of the
emission, transmission,
amplification, detection, and
modulation of light.