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DTSTART:20190331T030000
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DTSTART:20191027T020000
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DTSTAMP:20260406T024355Z
UID:5d9305033d466731374766@ist.ac.at
DTSTART:20191018T110000
DTEND:20191018T120000
DESCRIPTION:Speaker: Nicholas Lambert\nhosted by Johannes Fink\nAbstract: M
 any proposed quantum information technologies rely on coherent communicati
 on between two or more locations. Typical natural frequencies for supercon
 ducting and spin qubits are of order 1-10 GHz\, but communication at micro
 wave frequencies is subject to both loss and thermal noise. A better optio
 n is to communicate over optical channels\, and exploit fiber-based teleco
 mmunications technologies to do so. A key component in such a communicatio
 n chain is high efficiency\, high fidelity coherent conversion between the
  microwave and optical domains. Converting signals between frequencies req
 uires the presence of a non-linearity. In this talk I will describe conver
 sion from microwaves to optical frequencies via magneto-optic non-linearit
 ies. Strong coupling between cavity photons and magnons is desirable for h
 igh efficiencies\, and we demonstrate this using yttrium iron garnet (YIG)
  spheres and transmission line microwave cavities. We also use this archit
 ecture to couple magnetostatic modes in two spatially separated ferromagne
 ts. YIG spheres also support optical frequency whispering gallery modes\, 
 and we demonstrate coupling between the two\, leading to microwave to opti
 cal up-conversion. I will discuss some possibilities for improving the eff
 iciency of the conversion chain. Other non-linearities are available. Elec
 tro-optic non-linearities can offer up-conversion with relatively simple d
 evice architectures and well-understood materials. I will show results for
  triple-resonant enhanced up-conversion\, and describe our plans for incre
 ased efficiency and fidelity devices.
LOCATION:Heinzel Seminar Room / Office Bldg West (I21.EG.101)\, ISTA
ORGANIZER:cpetz@ist.ac.at
SUMMARY:Nicholas Lambert: Microwave up-conversion with magneto-optic and el
 ectro-optic non-linearities.
URL:https://talks-calendar.ista.ac.at/events/2297
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