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TT: Fachverband Tiefe Temperaturen

TT 98: Transport: Nanomechanics

TT 98.1: Talk

Thursday, April 3, 2014, 15:00–15:15, BEY 81

Phonon lasing and non-linear phenomena with nitrogen-vacancy centers in diamond — •Kosmas Kepesidis — Institut of Atomic and Subatomic Physics, TU Wien, Wien, Austria

I this talk, I will describe a new approach for manipulating and detecting the state of single and multiple vibrational modes in nanoscale diamond structures by making use of the strain-induced coupling to a nitrogen-vacancy impurity. I will first show how this coupling can be used to either cool the resonator close to its vibrational ground state or drive it to a large-amplitude coherent state (phonon lasing). In the second part of the talk I will then describe the complex non-linear phenomena that can arise in an array of coupled phonon-lasers under parity-time symmetric conditions, where phonon modes with alternating gain and loss of equal strength are coupled together.