An integrated nanoaperture optical-fiber tweezer for developing single-photon sources

dc.contributor.authorEhtaiba, Jamal Mehemed
dc.contributor.supervisorGordon, Reuven of Electrical and Computer Engineeringen_US of Philosophy Ph.D.en_US
dc.description.abstractIn this thesis, an approach for developing single-photon sources at the 1550nm wavelength will be demonstrated, based on optical trapping of luminescent upconverting nanoparticles. A single-photon source is a source that emits a single photon at a time, and hence it is a source of quantum bits that constitutes the basic building units in quantum computers and quantum communications. The approach exploits the plasmonic properties of gold films and the waveguiding characteristics of single mode optical fibers (SMFs). We start by planar nanofabrication of subwavelength nanoapertures in a thin gold film based on finite difference time domain simulations for a peak transmission at the wavelength in question. Subsequently, using ultraviolet curable epoxy adhesion material, a nanoaperture patterned on a gold film can be transferred to an SMF tip forming a nanoantenna enhanced optical fiber tweezer (NAFT). As a final step in building the optical tweezer, a test of the capability of the integrated optical fiber tweezer to trap 20 nm, and 30nm polystyrene nanospheres, as well as luminescent upconverting nanoparticles (UCNPs), has been experimentally realized with encouraging results. In addition to the optical trapping of the luminescent nanoparticles, the nano aperture antenna can improve light coupling into the low loss optical fiber guiding channel. Also, it could have a positive influence on enhancing the photon emission rate through the Purcell effect. Furthermore, we have combined NAFT with a low insertion loss wave splitter, a wavelength-division multiplexer (WDM), to allow measuring the 1550nm photon-emission statistics on a cooled superconducting nanowire single-photon detector (SNSPD) at ~ 2.4o K. Eventually, nanoantenna enhanced optical fiber tweezers can play an essential role in optical trapping towards developing single-photon sources and the emerging technology of quantum information processing, computation, and cryptography.en_US
dc.identifier.bibliographicCitation1. Ehtaiba, Jamal M., and Reuven Gordon. "Template-stripped nanoaperture tweezer integrated with optical fiber." Optics Express 26.8 (2018): 9607-9613. 2. Ehtaiba, Jamal M., and Reuven Gordon. "Integrated nanoaperture optical fiber tweezer." Optical Trapping and Optical Micromanipulation XV. Vol. 10723. International Society for Optics and Photonics, 2018. 3. Ehtaiba, Jamal M., and Reuven Gordon. "Beaming light through a bow-tie nanoaperture at the tip of a single-mode optical fiber." Optics Express 27.10 (2019): 14112-14120.en_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectOptical Trappingen_US
dc.subjectOptical Tweezeren_US
dc.subjectOptical Fiberen_US
dc.subjectSingle Photonen_US
dc.subjectSecond Coherenceen_US
dc.subjectAntibuched Lighten_US
dc.titleAn integrated nanoaperture optical-fiber tweezer for developing single-photon sourcesen_US


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