QI MASc Seminar: Electro-optic rotating half-waveplate for aquantum dot fine-structure eraserExport this event to calendar

Wednesday, July 31, 2019 — 11:00 AM EDT

Candidate: Simon Daley

Title: Electro-optic rotating half-waveplate for aquantum dot fine-structure eraser

 

Date: July 31, 2019

Time: 11:00 AM

Place: RAC 1101

Supervisor(s): Reimer, Michael M.E.

 

Abstract:

Tapered semiconductor nanowires form bright, nearly dephasing-free sources of entangled photon pairs when grown with an embedded quantum dot. An outstanding challenge with these sources is the presence of fine-structure splitting, which causes the output state to precess rapidly and degrades the measured entanglement fidelity [1]. The effects of fine-structure splitting can be “erased” once the photons have been emitted using a flexible all-optical approach which requires a rapidly rotating half-waveplate [2].  Commercially available off-the-shelf systems cannot emulate a half-waveplate rotating at the required speeds. I present an electro-optic device which can.

 

References:

[1] ACS Photonics6, 1656-1663 (2019)

[2] Opt. Express26, 24487 (2018)

Location 
RAC
Room 1101
200 University Avenue West

Kitchener, ON N2L 3G1
Canada

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