FIG. 7.25 (a) Optomechanical crystal tightly confined mechanical and optical resonances at the same physical location. This is achieved using photonic crystals to confine light and acoustic bandgap structure to confine mechanical vibrations ( Meenehan et al., 2014 ). (b) Basic setup of optical tweezer ( Ashkin et al., 1986 ) incoming spatially filtered laser beam focused using a microscope on a particle in a liquid. The focused beam undergoes reflections R₁ and R₂ and refraction by the sphere, resulting in a net upward force F_A on the particle. More about this image found in (a) Optomechanical crystal tightly confined mechanical and optical resonanc...

FIG. 7.24 (a) Two-axis MEMS mirror and grating based 1 × N wavelength router ( Stepanovsky, 2019 ). (b) A switchable wavelength add-drop filter array implemented using coupling-gap tuning of ring resonators ( Takahashi et al., 2008 ). (c) Frequency tuning of ring resonator by changing the perimeter of the ring ( Chu and Hane, 2014 ). (d) A ring resonator tuned by the proximity of a beam near the ring ( Yao et al., 2007 ). (e) Tuning of a ring resonator by bending the ring to the proximity of a high refractive index rim ( Errando-Herranz et al., 2015 ). (f) MEMS tuned microsphere switch ( Blue et al., 2011 ). More about this image found in (a) Two-axis MEMS mirror and grating based 1 × N wavelength router ( Stepan...