Journal
NATURE PHYSICS
Volume 8, Issue 5, Pages 387-392Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NPHYS2277
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Funding
- Japan Society for the Promotion of Science (JSPS) KAKENHI [20246064, 23241046]
- Grants-in-Aid for Scientific Research [23241046] Funding Source: KAKEN
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Photonic cavities have emerged as an indispensable tool to control and manipulate harmonic motion in opto/electromechanical systems(1). Invariably, in these systems a high-quality-factor photonic mode is parametrically coupled to a high-quality-factor mechanical oscillation mode(2-12). This entails the demanding challenges of either combining two physically distinct systems, or else optimizing the same nanostructure for both mechanical and optical properties(4-11). In contrast to these approaches, here we show that the cavity can be realized by the second oscillation mode of the same mechanical oscillator(13,14). A piezoelectric pump(15,16) generates strain-induced parametric coupling between the first and the second mode at a rate that can exceed their intrinsic relaxation rate. This leads to a mechanically induced transparency in the second mode which plays the role of the phonon cavity(17,18), the emergence of parametric normal-mode splitting(19,20) and the ability to cool the first mode(2-11). Thus, the mechanical oscillator can now be completely manipulated by a phonon cavity(21).
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