Rotate Photon Polarization: 90 Degrees?

In summary, if given a photon polarized at an unknown angle, it is possible to rotate it by 90 degrees or an arbitrary angle. However, this may be difficult for a single photon. There are various methods for altering the polarization of a beam of light, such as using a half-wave plate or a birefringent medium. For individual photons, rotating them does not change their polarization state as they have a specific helicity that translates to circular polarization. When looking at the macroscopic description of polarization, the light is composed of a population of partially coherent photons. The polarization of light is related to spin and certain types of radiation have a property corresponding to angular momentum.
  • #1
Dragonfall
1,030
4
If I'm given a photon polarized at some unknown angle, can I rotate it by 90 degrees (or by an arbitrary angle)?
 
Last edited:
Physics news on Phys.org
  • #2
Yes, although it may be difficult for a single photon.

There are lots of different ways of altering the polarization of a beam of light, generally. You could use a half-wave plate, or a birefringent medium, or a Faraday rotator, for example.
 
  • #3
Individual photons have "helicity", which translates into circular polarization. So 'rotating' the photon will not change the polarization state.

Going over to the macroscopic description of polarization, with arbitrary polarization states, means that the light is now composed of a population of partially (mutually) coherent photons. Pure polarized light is completely coherent, randomly polarized light is incoherent. Descriptions of polarizers and retarders using photons is statistical in nature.

The polarization of light corresponds to spin, certain specially-prepared fields (Bessel beams, etc) of radiation possesses a property corresponding to angular momentum.
 

FAQ: Rotate Photon Polarization: 90 Degrees?

What is photon polarization?

Photon polarization refers to the orientation of a photon's electromagnetic field as it travels through space. It can be described as either linear or circular, depending on the direction of the field relative to the photon's direction of travel.

How can a photon's polarization be rotated 90 degrees?

A photon's polarization can be rotated by passing it through a material with certain optical properties, such as a polarizing filter or a crystal. These materials can change the direction of the photon's electric field, resulting in a rotation of polarization.

Why is rotating photon polarization important?

Rotating photon polarization is important in many applications, including telecommunications, quantum computing, and optical imaging. It allows for the manipulation and control of light, which is essential for these technologies to function.

Can all types of photons be rotated 90 degrees?

Yes, all types of photons, including those from visible light, radio waves, and X-rays, can be rotated 90 degrees by passing them through the appropriate materials. However, the efficiency of polarization rotation may vary depending on the type of photon.

What are some real-world examples of rotating photon polarization?

One example of rotating photon polarization is in 3D movie glasses, where the lenses are coated with a special material that rotates the polarization of light to create the illusion of depth. Another example is in satellite communication, where polarizing filters are used to transmit and receive signals with different polarizations to reduce interference.

Back
Top