Other Publications (1)
Articles by Kewen Han in JoVE
Fabrication and Testing of Microfluidic Optomechanical Oscillators Kewen Han1, Kyu Hyun Kim2, Junhwan Kim1, Wonsuk Lee2,3, Jing Liu3, Xudong Fan3, Tal Carmon2, Gaurav Bahl1 1Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, 2Electrical Engineering and Computer Science, University of Michigan, 3Biomedical Engineering, University of Michigan Parametric optomechanical excitations have recently been experimentally demonstrated in microfluidic optomechanical resonators by means of optical radiation pressure and stimulated Brillouin scattering. This paper describes the fabrication of these microfluidic resonators along with methodologies for generating and verifying optomechanical oscillations.
Other articles by Kewen Han on PubMed
Aerostatically Tunable Optomechanical Oscillators Optics Express. Jan, 2014 | Pubmed ID: 24515132 Recently, the first microfluidic optomechanical device was demonstrated, capable of operating with non-solid states of matter (viscous fluids, bioanalytes). These devices exhibit optomechanical oscillation in both the 10-20 MHz and 10-12 GHz regimes, driven by radiation pressure (RP) and stimulated Brillouin scattering (SBS) respectively. In this work, we experimentally investigate aerostatic tuning of these hollow-shell oscillators, enabled by geometry, stress, and temperature effects. We also demonstrate for the first time the simultaneous actuation of RP-induced breathing mechanical modes and SBS-induced whispering gallery acoustic modes, through a single pump laser. Our result is a step towards completely self-referenced optomechanical sensor technologies.