Duggan Robert, Del Pino Javier, Verhagen Ewold, Alù Andrea
Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78712, USA.
Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands.
Phys Rev Lett. 2019 Jul 12;123(2):023602. doi: 10.1103/PhysRevLett.123.023602.
We demonstrate an optomechanical platform where optical mode conversion mediated by mechanical motion enables the arbitrary tailoring of polarization states of propagating light fields. Optomechanical interactions are realized in a Fabry-Pérot resonator, which naturally supports two polarization-degenerate states while an optical control field induces rotational symmetry breaking. Applying such principles, the entire Poincaré sphere is spanned by just optical control of the driving field, realizing reciprocal and nonreciprocal optomechanically induced birefringence for linearly polarized and circularly polarized control driving. A straightforward extension of this setup also enables all-optical tunable isolation and circulation. Our findings open new avenues to exploit optomechanics for the arbitrary manipulation of light polarization.
我们展示了一个光机械平台，其中由机械运动介导的光学模式转换能够对传播光场的偏振态进行任意定制。光机械相互作用在法布里 - 珀罗谐振器中实现，该谐振器自然支持两个偏振简并态，而一个光学控制场会引起旋转对称性破缺。应用这些原理，仅通过对驱动场进行光学控制就能覆盖整个庞加莱球，实现了线偏振和圆偏振控制驱动下的互易和非互易光机械诱导双折射。这种设置的直接扩展还能实现全光可调隔离和循环。我们的研究结果为利用光机械学对光偏振进行任意操纵开辟了新途径。
