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Page 1: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 2: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 3: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 4: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 5: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 6: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 7: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion

Block P1 (only 1 photon input)

{No single-photon interference with |1,1> input.}

Page 8: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 9: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 10: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 11: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 12: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion

Photon Orbital Angular Momentum

http://www.physics.gla.ac.uk/Optics/play/photonOAM/

Page 13: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion

“Orbital” Angular Momentum of Photons• Donut modes- Laguerre-Gaussian• Phase SINGULARITY• Quantized in multiples of

|-1⟩ = L

|0⟩ = G

|1⟩ = RHolographic

Preparation/Detection

• Couple into single-mode fiber -- only accepts Gaussian mode; all others too big and cannot propagate inside fiber

• Together with the hologram we can detect other spatial modes

ℓ–2ℓ–1ℓℓ+1ℓ+2

Diffraction at a dislocation changes the donut mode angular momentum

Qutrits!

Page 14: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 15: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion

AOM Mode Sorter

Page 16: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion
Page 17: PowerPoint Presentation - courses.physics.illinois.edu · photonic de Broglie wavelength of entangled photon pairs (biphotons) generated by spontaneous parametric down-conversion

Observation of Four-Photon Orbital Angular Momentum EntanglementB. C. Hiesmayr, M. J. A. de Dood, and W. LöfflerPhys. Rev. Lett. 116, 073601 (2016)Published February 16, 2016