Moving boundary and photoelastic coupling in GaAs optomechanical resonators

• DOI: 10.1364/optica.1.000414
• Publication Date: 2014-12-11T15:26:26Z
• Authors: Krishna C. Balram; Marcelo Davanço; Ju Young Lim; Jin Dong Song; Kartik Srinivasan
• Keywords: Condensed Matter - Mesoscale and Nanoscale Physics; /dk/atira/pure/core/keywords/faculty_of_enigneering/photonics_and_quantum; /dk/atira/pure/core/keywords/faculty_of_enigneering/photonics_and_quantum; name=Photonics and Quantum; 500; FOS: Physical sciences; 530; 01 natural sciences; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; name=Photonics and Quantum; Physics - Optics; Optics (physics.optics)

Chip-based cavity optomechanical systems are being considered for applications in sensing, metrology, and quantum information science.Critical to their development is an understanding of how the optical mechanical modes interact, quantified by coupling rate g 0 .Here, we develop GaAs resonators investigate moving dielectric boundary photoelastic contributions .First, consider between fundamental radial breathing mode a 1550 nm band whispering gallery microdisks.For decreasing disk radius from R 5 1 μm, simulations measurements show that changes dominated contribution having equal contribution.Next, design demonstrate nanobeam crystals, which 2.5 GHz couples mode, predominantly through effect.We significant (30%) dependence on device's in-plane orientation, resulting difference coefficients along different crystalline axes, with fabricated devices exhibiting ∕2π as high 1.1 MHz, orientation [110] axis.GaAs crystals promising system, can combine demonstrated large strength additional functionality, such piezoelectric actuation incorporation gain media.