Volume 9, Issue 2, November 2014, Pages 734–743
Mubarack Ahmed1, Alfred Amponsah2, Akweittey Emmanuel3, and Haruna Issaka4
1 Lecturer Information Technology Department, Garden City University College, Kumasi, Ashanti, Ghana
2 Lecturer Information Technology Department, Garden City University College, Kumasi, Ashanti, Ghana
3 Lecturer Mathematics Department, Presbyterian University College, Ghana
4 MPhil (Hons), Department of Mathematics, Kwame Nkrumah University of Science and Technology, Kumasi, Ashanti, Ghana
Original language: English
Copyright © 2014 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The importance of photon pair generation can never be overemphasized. It has formed the basis of most fundamental quantum optical experiments like Bell-experiments, quantum teleportation and entanglement swapping. However for considerable number of years Quantum Mechanics in general has remained largely theoretical and within the four corners of laboratories. Quantum Key Distribution is one of the first quantum applications to break this barrier. It provides us with unconditionally secured communication by providing us with efficient alternative to classical cryptography. This study forms part of the effort in realizing efficient way of generating photon pairs through the Spontaneous Parametric Down-Conversion process using a nonlinear crystal cut for type-I phase matching. After generating the photon pairs, the paper examined how they can be detected efficiently. We measured the rate of single photon generation (up to 200 kHz) as well as the rate at which they are detected in coincidence (150 coincidences per second). We further investigated a quantum interference effect (the Hong-Ou-Mandel effect) which classical wave theory has failed to describe. This effect has numerous applications in scalable quantum networks and in linear quantum computing. Finally, a remarkable conversion efficiency of 2.2
Author Keywords: photon pair, spontaneous, down-conversion, quantum interference, phase matching, nonlinear, crystal.
Mubarack Ahmed1, Alfred Amponsah2, Akweittey Emmanuel3, and Haruna Issaka4
1 Lecturer Information Technology Department, Garden City University College, Kumasi, Ashanti, Ghana
2 Lecturer Information Technology Department, Garden City University College, Kumasi, Ashanti, Ghana
3 Lecturer Mathematics Department, Presbyterian University College, Ghana
4 MPhil (Hons), Department of Mathematics, Kwame Nkrumah University of Science and Technology, Kumasi, Ashanti, Ghana
Original language: English
Copyright © 2014 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The importance of photon pair generation can never be overemphasized. It has formed the basis of most fundamental quantum optical experiments like Bell-experiments, quantum teleportation and entanglement swapping. However for considerable number of years Quantum Mechanics in general has remained largely theoretical and within the four corners of laboratories. Quantum Key Distribution is one of the first quantum applications to break this barrier. It provides us with unconditionally secured communication by providing us with efficient alternative to classical cryptography. This study forms part of the effort in realizing efficient way of generating photon pairs through the Spontaneous Parametric Down-Conversion process using a nonlinear crystal cut for type-I phase matching. After generating the photon pairs, the paper examined how they can be detected efficiently. We measured the rate of single photon generation (up to 200 kHz) as well as the rate at which they are detected in coincidence (150 coincidences per second). We further investigated a quantum interference effect (the Hong-Ou-Mandel effect) which classical wave theory has failed to describe. This effect has numerous applications in scalable quantum networks and in linear quantum computing. Finally, a remarkable conversion efficiency of 2.2
Author Keywords: photon pair, spontaneous, down-conversion, quantum interference, phase matching, nonlinear, crystal.
How to Cite this Article
Mubarack Ahmed, Alfred Amponsah, Akweittey Emmanuel, and Haruna Issaka, “Source of Photon Pairs Using Spontaneous Parametric Down-Conversion Process,” International Journal of Innovation and Applied Studies, vol. 9, no. 2, pp. 734–743, November 2014.
