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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-7978
DTSTART:20221024T183000Z
DTEND:20221024T193000Z
DTSTAMP:20260414T054105Z
LAST-MODIFIED:20221021T193349Z
LOCATION:2401 Chemistry (enter in new North Tower\, 2nd floor)
SUMMARY:Molecular Quantum Photonics\, Wisconsin Quantum Institute\, Al
ex S. Clark\, Quantum Engineering Technology Labs\, University of Bris
tol
DESCRIPTION:Single organic molecules have recently seen increased inte
rest for use as single photon sources [1]. They emit photons with high
efficiency and at favourable wavelengths for coupling to other quantu
m systems\, such as alkali atoms [2]. I will present our recent work o
n growing various mixed molecular crystals [3\,4] which show promise f
or interfacing with rubidium and potassium atoms. I will discuss metho
ds that can be used to tune molecule emission via both applied electri
c fields and the application of strain [5]. We have recently shown tha
t subsequent photons emitted by a single molecule can undergo quantum
interference at a beam splitter [6]\, which is a useful tool in optica
l quantum computing and communication. I will discuss how the indistin
guishability of photons can not only be ascertained employing pulsed e
xcitation\, which is commonly carried out for single quantum emitters\
, but can also be found via continuous wave excitation as long as meas
urements are carried out at more than one excitation power. While the
excitation of molecules and their subsequent radiative emission is eff
icient [7]\, the generated photons can be difficult to collect. There
is therefore a large amount of ongoing work on coupling organic molecu
les to nanophotonic structures to modify their emission. The simplest
photonic structure one can imagine is an integrated optical waveguide.
I will discuss methods to deposit and evanescently couple molecules t
o waveguides\, and present a hybrid plasmonic structure that has shown
recent promise [8]. Evanescent coupling has limitations as the molecu
les cannot sit at the maximum of the vacuum electric field of the wave
guide. I will present our recent work on coupling molecules to interru
pted waveguides using on chip micro-capillaries [9]. Finally\, I will
discuss our future plans to couple molecules to enhance this coupling
through the use of nanophotonic cavities.
\n
\n[1] C. Toninel
li et al.\, Nature Materials 20\, 1615-1628 (2021).
\n[2] P. Siyus
hev et al.\, Nature 509\, 66-70 (2014).
\n[3] R. C. Schofield et a
l.\, Optical Materials Express 10\, 1586-1596 (2020).
\n[4] R. C.
Schofield et al.\, ChemPhysChem 23\, e202100809 (2022).
\n[5] A. F
asoulakis et al.\, submitted (2022).
\n[6] R. C. Schofield et al.\
, Phys. Rev. Research 4\, 013037 (2022).
\n[7] P. Ren et al.\, Chi
nese Physics Letters 20\, 073602 (2022).
\n[8] S. Grandi et al.\,
APL Photonics 4\, 086101 (2019).
\n[9] S. Boissier et al.\, Nature
Commun. 12\, 706 (2021).
\n
URL:https://www.physics.wisc.edu/events/?id=7978
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