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2015 ; 5
(ä): 9663
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Optomechanically-induced transparency in parity-time-symmetric microresonators
#MMPMID26169253
Jing H
; Özdemir ?K
; Geng Z
; Zhang J
; Lü XY
; Peng B
; Yang L
; Nori F
Sci Rep
2015[Jun]; 5
(ä): 9663
PMID26169253
show ga
Optomechanically-induced transparency (OMIT) and the associated slowing of light
provide the basis for storing photons in nanoscale devices. Here we study OMIT in
parity-time (PT)-symmetric microresonators with a tunable gain-to-loss ratio.
This system features a sideband-reversed, non-amplifying transparency, i.e., an
inverted-OMIT. When the gain-to-loss ratio is varied, the system exhibits a
transition from a PT-symmetric phase to a broken-PT-symmetric phase. This
PT-phase transition results in the reversal of the pump and gain dependence of
the transmission rates. Moreover, we show that by tuning the pump power at a
fixed gain-to-loss ratio, or the gain-to-loss ratio at a fixed pump power, one
can switch from slow to fast light and vice versa. These findings provide new
tools for controlling light propagation using nanofabricated phononic devices.