Radial Vibrations in Short, Hollow Cylinders of Barium Titanate

Cascaded optical transparency in multimode-cavity optomechanical systems

“…In both quantum and classical domain, optical delay is a favored feature for advanced optical networks, as it offers the ability to buffer and store optical signals 1 . One promising method to produce optical delay is through electromagnetically induced transparency (EIT) 2 , which arises from the quantum interference between different excitation paths as demonstrated in many platforms 3,4,5,6,7 . The optical transmission and delay time are two important parameters to describe the performance of one EIT process.…”

2.97-GHz CVD diamond ring resonator with Q >40,000

“…Here, R anc gauges the acoustic energy loss to the substrate, and R beam the acoustic loading of the beam seen by the ring. When the beam vibrates in an extensional mode, Z a , Z b , and Z c take on values given by [11] and (8) where L S is the length of the support beam, Z 0 =1/(A( E) 1/2 ) is the characteristic mobility, = /v e is the propagation constant, and v e =(E/ ) 1/2 is the material acoustic velocity. The beam length corresponds to an effective quarterwavelength when , n =1,3,5, ……”

GHz aluminum nitride optomechanical wheel resonators

“…2, we plot the calculated frequencies for each radial-contour mode as a function of the outer ring radius R o when the inner radius of the ring is fixed at R i = 32.6 µm [11]. At R o = 37.6 µm (vertical dashed line), the theoretical values of the resonant frequencies are found to be 1.05 GHz (m = 1), 2.11 GHz (m = 2), etc.…”