The crux of using the cascaded emission of a 3-level quantum ladder
system to generate indistinguishable photons
- URL: http://arxiv.org/abs/2006.05476v2
- Date: Thu, 11 Jun 2020 17:12:37 GMT
- Title: The crux of using the cascaded emission of a 3-level quantum ladder
system to generate indistinguishable photons
- Authors: Eva Sch\"oll (1), Lucas Schweickert (1), Lukas Hanschke (2 and 3),
Katharina D. Zeuner (1), Friedrich Sbresny (2 and 3), Thomas Lettner (1),
Rahul Trivedi (4), Marcus Reindl (5), Saimon Filipe Covre da Silva (5),
Rinaldo Trotta (6), Jonathan J. Finley (7 and 3), Jelena Vu\v{c}kovi\'c (4),
Kai M\"uller (2 and 3), Armando Rastelli (5), Val Zwiller (1), and Klaus D.
J\"ons (1) ((1) Department of Applied Physics, Royal Institute of Technology,
Albanova University Centre, Stockholm, Sweden, (2) Walter Schottky Institut
and Department of Electrical and Computer Engineering, Technische
Universit\"at M\"unchen, Garching, Germany, (3) Munich Center of Quantum
Science and Technology (MCQST), Germany, (4) Ginzton Laboratory, Stanford
University, USA, (5) Institute of Semiconductor and Solid State Physics,
Johannes Kepler University Linz, Austria, (6) Dipartimento di Fisica,
Sapienza Universit\`a di Roma, Italy, (7) Walter Schottky Institut and Physik
Department, Technische Universit\"at M\"unchen, Garching, Germany)
- Abstract summary: We show that the indistinguishability is inherently limited for both emitted photons and determined by the ratio of the lifetimes of the excited and intermediate states.
We propose photonic structures to optimize the lifetime ratio and overcome the limited indistinguishability of cascaded photon emission from a 3-level quantum ladder system.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We investigate the degree of indistinguishability of cascaded photons emitted
from a 3-level quantum ladder system; in our case the biexciton-exciton cascade
of semiconductor quantum dots. For the 3-level quantum ladder system we
theoretically demonstrate that the indistinguishability is inherently limited
for both emitted photons and determined by the ratio of the lifetimes of the
excited and intermediate states. We experimentally confirm this finding by
comparing the quantum interference visibility of non-cascaded emission and
cascaded emission from the same semiconductor quantum dot. Quantum optical
simulations produce very good agreement with the measurements and allow to
explore a large parameter space. Based on our model, we propose photonic
structures to optimize the lifetime ratio and overcome the limited
indistinguishability of cascaded photon emission from a 3-level quantum ladder
system.
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