{
  "annotation_id": "93c22507-24ca-4508-87e7-f4c566ff0338",
  "date_created": "2026-02-17T05:53:04.320000Z",
  "date_modified": "2026-02-17T05:53:04.320000Z",
  "file_hash": "81c07a5c101965cae34370685ed940a0691d07d9eec1dd8920873b2de2c69861",
  "private": false,
  "record": {
    "abstract": "Film bulk acoustic wave resonators (FBARs) underpin modern wireless communication by enabling compact, high-performance RF filters in modern smartphones. Traditionally, these FBAR devices work with quasi-plane waves of sound where the transverse extent of the acoustic field $\\gg$ the acoustic wavelength ($\\lambda_a$). On the other hand, strong modal confinement is needed for achieving the interaction strengths necessary for building efficient microwave to optical quantum photon transducers (MW-OT) around an FBAR opto-mechanical cavity platform. Here, we fabricate a small mode-volume phonon trapping lateral field excited FBAR resonator (XBAR) by shaping the piezoelectric layer into a spherical lens, show an improvement in modal confinement and quality factor ($\\approx$ 4$\\times$), and discuss the improvements needed for building efficient MW-OTs around this XBAR geometry.",
    "arxiv_id": "2601.05815",
    "authors": [
      "Elnaz Shokati",
      "Robert Thomas",
      "Krishna C. Balram"
    ],
    "categories": [
      "physics.optics",
      "physics.app-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Phonon Trapping Lateral Field Excited Suspended Bulk Acoustic Wave Resonators (XBARs)",
    "url": "https://arxiv.org/abs/2601.05815",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "48dc1fde-c455-451c-94f9-42b1dfb1de69",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}