Whispering gallery mode microcavities: from fabrication to applications

Simple item page
dc.check.embargoformatNot applicableen
dc.check.infoNo embargo requireden
dc.check.opt-outYesen
dc.check.reasonNo embargo requireden
dc.check.typeNo Embargo Required
dc.contributor.advisorNic Chormaic, Síleen
dc.contributor.advisorRuth, Albert A.en
dc.contributor.authorMadugani, Ramgopal
dc.contributor.funderOkinawa Institute of Science and Technology Graduate Universityen
dc.date.accessioned2017-06-01T13:16:06Z
dc.date.available2017-06-01T13:16:06Z
dc.date.issued2017
dc.date.submitted2017
dc.description.abstractTrapping and cooling macroscopic objects using light has attracted great interest recently as it may enable us to see quantum mechanical features in large systems. A microsphere pendulum is one such system to put it to test. This thesis work is devoted to solving many of the steps necessary for future trapping and cooling works of a microsphere pendulum using a whispering gallery mode (WGM) cavity-based photonic molecule scheme. In the course of implementing this scheme, microcavity devices, such as microspheres and microbubbles were studied for topics as diverse as optomechanics, photonics, laser tuning and spectroscopy. The WGMs in the microsphere pendulum sense its mechanical mode through fibre taper coupling of light. Its properties in the evanescent light fields and its optomechanical transduction characteristics were investigated. This system is highly dissipative - a feature which could prove to be very useful for cavity cooling applications. Owing to its pressure tuning capability, a microbubble cavity can be used as a means of finding co-resonances as needed to achieve a photonic molecule and mode splitting. By locking a laser to a WGM of a microbubble resonator, linear tuning and stability characteristics of the WGM via pressure were studied. A fast method of sensing and estimation of dissipation and dispersion individually in an optomechanical system with minimal invasion was required. In this regard, cavity-ringup spectroscopy (CRUS) was investigated by simply measuring the peak height of the CRUS signal, enabling ultrafast sensing applications. Finally, a coupled, two cavity system, known as a photonic molecule, was studied for its optomechanical transduction properties in CMIT, ATS and their intermediate regimes making way for understanding the trapping capabilities of such a system. The range of studies in this thesis also illustrate the versatility of WGM-based resonators in optics measurements extending from fundamental optomechanics to applied photonics.en
dc.description.statusNot peer revieweden
dc.description.versionAccepted Version
dc.format.mimetypeapplication/pdfen
dc.identifier.citationMadugani, R. 2017. Whispering gallery mode microcavities: from fabrication to applications. PhD Thesis, University College Cork.en
dc.identifier.urihttps://hdl.handle.net/10468/4037
dc.language.isoenen
dc.publisherUniversity College Corken
dc.rights© 2017, Ramgopal Madugani.en
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/en
dc.subjectWhispering gallery modesen
dc.subjectMicrocavitiesen
dc.subjectMicroresonatorsen
dc.subjectMicropendulumen
dc.subjectMicrobubble cavityen
dc.thesis.opt-outtrue
dc.titleWhispering gallery mode microcavities: from fabrication to applicationsen
dc.typeDoctoral thesisen
dc.type.qualificationlevelDoctoralen
dc.type.qualificationnamePhD (Science)en
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
RamgopalM_PhD2017_Abstract.pdf
Size:
167.3 KB
Format:
Adobe Portable Document Format
Description:
Abstract
License bundle
Now showing 1 - 2 of 2
Thumbnail Image
Name:
license.txt
Size:
5.62 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Thumbnail Image
Name:
Ramgopal Madugani.pdf
Size:
34 KB
Format:
Adobe Portable Document Format
Description:
Opt-Out Form
Collections
Doctoral Theses
College of Science, Engineering and Food Science - Doctoral Theses
Physics - Doctoral Theses