LEADER 04054nam 22007215 450 001 9910765483303321 005 20231117164802.0 010 $a3-031-44332-2 024 7 $a10.1007/978-3-031-44332-9 035 $a(MiAaPQ)EBC30954306 035 $a(Au-PeEL)EBL30954306 035 $a(DE-He213)978-3-031-44332-9 035 $a(CKB)28887503000041 035 $a(EXLCZ)9928887503000041 100 $a20231117d2023 u| 0 101 0 $aeng 135 $aurcnu|||||||| 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 10$aOptically Trapped Microspheres as Sensors of Mass and Sound $eBrownian Motion as Both Signal and Noise /$fby Logan Edward Hillberry 205 $a1st ed. 2023. 210 1$aCham :$cSpringer Nature Switzerland :$cImprint: Springer,$d2023. 215 $a1 online resource (124 pages) 225 1 $aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5061 311 08$aPrint version: Hillberry, Logan Edward Optically Trapped Microspheres As Sensors of Mass and Sound Cham : Springer,c2023 9783031443312 327 $aChapter 1. Introduction -- Chapter 2. Technical Background -- Chapter 3. Experimental set-up -- Chapter 4. Results -- Chapter 5. Conclusions. 330 $aThis thesis makes significant advances in the use of microspheres in optical traps as highly precise sensing platforms. While optically trapped microspheres have recently proven their dominance in aqueous and vacuum environments, achieving state-of-the-art measurements of miniscule forces and torques, their sensitivity to perturbations in air has remained relatively unexplored. This thesis shows that, by uniquely operating in air and measuring its thermally-fluctuating instantaneous velocity, an optically trapped microsphere is an ultra-sensitive probe of both mass and sound. The mass of the microsphere is determined with similar accuracy to competitive methods but in a fraction of the measurement time and all while maintaining thermal equilibrium, unlike alternative methods. As an acoustic transducer, the air-based microsphere is uniquely sensitive to the velocity of sound, as opposed to the pressure measured by a traditional microphone. By comparison to state-of-the-art commercially-available velocity and pressure sensors, including the world?s smallest measurement microphone, the microsphere sensing modality is shown to be both accurate and to have superior sensitivity at high frequencies. Applications for such high-frequency acoustic sensing include dosage monitoring in proton therapy for cancer and event discrimination in bubble chamber searches for dark matter. In addition to reporting these scientific results, the thesis is pedagogically organized to present the relevant history, theory, and technology in a straightforward way. 410 0$aSpringer Theses, Recognizing Outstanding Ph.D. Research,$x2190-5061 606 $aAtoms 606 $aMetrology 606 $aOptics 606 $aMeasurement 606 $aMeasuring instruments 606 $aAcoustics 606 $aStatistical Physics 606 $aMetrology and Fundamental Constants 606 $aLight-Matter Interaction 606 $aMeasurement Science and Instrumentation 606 $aAcoustics 606 $aStatistical Physics 615 0$aAtoms. 615 0$aMetrology. 615 0$aOptics. 615 0$aMeasurement. 615 0$aMeasuring instruments. 615 0$aAcoustics. 615 0$aStatistical Physics. 615 14$aMetrology and Fundamental Constants. 615 24$aLight-Matter Interaction. 615 24$aMeasurement Science and Instrumentation. 615 24$aAcoustics. 615 24$aStatistical Physics. 676 $a539 676 $a530.8 700 $aHillberry$b Logan Edward$01448890 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910765483303321 996 $aOptically Trapped Microspheres as Sensors of Mass and Sound$93644903 997 $aUNINA