سخنرانی عمومی در تیرماه

Dear all, 
It is a pleasure for me to announce that the speaker of the  next colloquium  is  Dr. Shabir Barzanjeh of
Institute of Science and Technology(IST), Austria,. More information can be found in the textbox to the right.

Everybody is welcome to attend.

With kind regards,
Y. Farzan

Speaker

Dr. Shabir Barzanjeh

Affliation

Institute of Science and Technology(IST), Austria

Title of talk

nonreciprocity with optomechanical cavity
(یکسو سازی فوتونی در کاواک های اپتومکانیکی)

Date and time

Wednesday, Tir 21 (12th of July), 4:30 pm

Place

Farmanieh builing

Abstract

Nonreciprocal circuit elements form an integral part of modern measurement and communication systems. Mathematically they require breaking of time-reversal symmetry, typically achieved using magnetic materials and more recently using the quantum Hall effect, parametric permittivity modulation or Josephson nonlinearities. Here, we demonstrate an on-chip magnetic-free circulator based on reservoir engineered optomechanical interactions. Directional circulation is achieved with controlled phase-sensitive interference of six distinct electro-mechanical signal conversion paths. The presented circulator is compact, its silicon-on-insulator platform is compatible with both superconducting qubits and silicon photonics, and its noise performance is close to the quantum limit. With a high dynamic range, a tunable bandwidth of up to 30 MHz and an in-situ reconfigurability as beam splitter or wavelength converter, it could pave the way for superconducting qubit processors with integrated and multiplexed on-chip signal processing and readout.

 

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