Quantum dot single-photon source | Wikipedia audio article
Channel: wikipedia tts
Date: 24/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Quantum_dot_single-photon_source


00:00:49 1 History
00:01:44 2 Theory of realizing a single-photon source
00:04:56 3 Experimental realization
00:06:35 3.1 Verification of emission of single photons
00:08:31 3.2 Indistinguishability of the emitted photons
00:09:26 4 Applications
00:10:26 5 See also



Listening is a more natural way of learning, when compared to reading. Written language only began at around 3200 BC, but spoken language has existed long ago.

Learning by listening is a great way to:
- increases imagination and understanding
- improves your listening skills
- improves your own spoken accent
- learn while on the move
- reduce eye strain

Now learn the vast amount of general knowledge available on Wikipedia through audio (audio article). You could even learn subconsciously by playing the audio while you are sleeping! If you are planning to listen a lot, you could try using a bone conduction headphone, or a standard speaker instead of an earphone.

Listen on Google Assistant through Extra Audio:
https://assistant.google.com/services/invoke/uid/0000001a130b3f91
Other Wikipedia audio articles at:
https://www.youtube.com/results?search_query=wikipedia+tts
Upload your own Wikipedia articles through:
https://github.com/nodef/wikipedia-tts



"There is only one good, knowledge, and one evil, ignorance."
- Socrates



SUMMARY
=======
A quantum dot single-photon source is based on a single quantum dot placed in an optical microcavity. It is an on-demand single photon source. A pulsed laser can excite a pair of carriers known as an exciton in the quantum dot. Due to the discrete energy levels, only one exciton can exist in the quantum dot at a given time. The decay of the exciton due to spontaneous emission leads to the emission of a single photon. It is a nonclassical light source that shows photon antibunching. The emission of single photons can be proven by measuring the second order intensity correlation function. The linewidth of the emitted photons can be reduced by using distributed Bragg reflectors (DBR’s). Additionally, DBR's lead to an emission in a well-defined direction.