What is Photodetector ?
Photo means light. A detector is a device that detects something. So, a photodetector can be defined as a device that is used to detect light radiations by absorption. It converts light pulses(or radiations) energy into electrical signals in the form of current & voltage. Sometimes, it is also called photosensors. As the name implies, it detects incident photons or radiations by absorbing the incident lights. The principle behind this process is known as photodetections.
Characteristics of Photodetector
- The detector should be sensitive.
- It should have a fast response.
- It should have the ability to detect a considerable range of wavelengths, ƛ.
- The electrical energy produced by the detector must be directly proportional to the transmitted intensity of the radiation.
Structure of Photodetector
The structure of a photodetector is similar to a photodiode:
When the incident radiation falls on the surface of the material of the photoconductor the photons present in the light are absorbed by the surface material which then next generates newly charged particles as electron-hole pairs which are further responsible for the production of electrical signals.
The suitable material use for making photodetector is semiconductor. Graphene (an allotrope of Carbon) is best known material for making of photodetectors.
Photodetector
A photo is nothing but light. A detector is nothing but a device that detects something. Therefore, we can directly conclude that a photodetector can be defined as a device that is used to detect light radiations by absorption. In this Article, We will be going through Photodetector, We will start our Article with What is Photodetector?, Then we will go through its brief Working, then we will go through its properties and go through all the types, At last, we will conclude our Article with Advantages, Disadvantages and Some FAQs.
Table of Content
- What is PhotoDetectors ?
- Working of PhotoDetector
- Classes of PhotoDetector
- Photodetector Properties
- Types of PhotoDetector
- Comparison Between Photodetector and Photodiode
- Applications of Photodetector
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