Graduates

Light Interaction with Cold ⁸⁷Rb Ground and Rydberg States via an Optical Nanofiber and in an Optical Resonator

Graduated PhD 2025

Publications

• Light-induced, fictitious magnetic trapping for cold, alkali-metal atoms using an optical tweezer-nanofiber platform
  A Vylegzhanin, DJ Brown, S Abdrakhmanov and S Nic Chormaic
  Phys. Rev. A (2026)

• Collective vacuum-Rabi splitting with an atomic spin wave coupled to a cavity mode
  F Hoffet, A Vylegzhanin, E Distante, L Heller, S Nic Chormaic and H de Riedmatten
  Quantum Sc. Technol. 11, 015041 (2026)

• Towards a fictitious magnetic field trap for both ground and Rydberg state ⁸⁷Rb atoms via the evanescent field of an optical nanofiber
  A Vylegzhanin, DJ Brown, DF Kornovan, E Brion and S Nic Chormaic
  New J. Phys. 27, 073203 (2025)

• Rydberg electromagnetically induced transparency based laser lock to Zeeman sublevels with 0.6 GHz scanning range
  A Vylegzhanin, S Nic Chormaic and D Brown
  Rev. Sci. Instrum. 95, 113001 (2024)

• Atom-light interactions using optical nanofibres - A perspective
  W Li, D Brown, A Vylegzhanin, Z Shahrabifarahani, A Raj, J Du and S Nic Chormaic
  J. Phys. Photon. 6, 021002 (2024)

• Excitation of ⁸⁷Rb Rydberg atoms to nS and nD states (n<68) via an optical nanofiber
  A Vylegzhanin, DJ Brown, A Raj, DF Kornovan, JL Everett, E Brion, J Robert and S Nic Chormaic
  Optica Quant. 1, 6 (2023)

Design, Fabrication, and Characterization of Optical Nanofiber Cavities

Graduated PhD 2024

Publications

• Manipulation of polarization topology using a Fabry-Perot fiber cavity with a higher-order mode optical nanofibers
  M Maeda, J Keloth and S Nic Chormaic
  Photonics Res. 11, 1029 (2023)

• Fabrication of optical nanofibre-based cavities using focussed ion-beam milling - A review
  P Romagnoli, M Maeda, JM Ward, VG Truong and S Nic Chormaic
  Appl. Phys. B  126, 111 (2020)

Metamaterial Plasmonic Tweezers for Enhanced Nanoparticle Trapping

Graduated PhD 2023

Publications

• Disruptive forces in metamaterial tweezes for trapping nanoparticles containing molecular graphene quantum dots
  TD Bouloumis, H Zhao, N Kokkinidas, Y Hu, VG Truong, A Narita and S Nic Chormaic
  Adv. Opt. Mat. 13, e01916 (2025)

• Manipulation, trapping, and biosensing using metamaterial devices
  DG Kotsifaki, TD Bouloumis, VG Truong and S Nic Chormaic
  in Biophotonics Congress: Optics in the Life Sciences 2023, Technical Digest Series (Optica Publishing Group, 2023), paper ATu2D.2

• Enabling self-induced back-action trapping of gold nanoparticles in metamaterial plasmonic tweezers
  TD Bouloumis, DG Kotsifaki and S Nic Chormaic 
  Nano Lett. 23, 4723 (2023)

• Fast and efficient nanoparticle trapping using plasmonic connected nanoring apertures
  TD Bouloumis, DG Kotsifaki, X Han, S Nic Chormaic and VG Truong
  Nanotechnology 32, 025507 (2021)

• From far-field to near-field micro- and nanoparticle optical trapping
  T Bouloumis and S Nic Chormaic
  Appl. Sci. 10, 1375 (2020)

Evanescent field mediated interactions of cold rubidium atoms with optical nanofiber guided light

Graduated PhD 2022

Publications

• Cold atoms in space: Community workshop summary and proposed road-map
  I Alonso et al. [RK Gupta]
  EPJ Quantum Technol. 9, 30 (2022)

• Machine leaner optimization of optical nanofiber-based dipole traps for cold ⁸⁷Rb atoms
  RK Gupta, JL Everett, AD Tranter, R Henke, V Gokhroo, PK Lam and S Nic Chormaic
  AVS Quantum Sci. 4, 026801 (2022).

• Spin selection in single-frequency two-photon excitation of alkali-metal atoms
  KS Rajasree, RK Gupta, V Gokhroo, F Le Kien, T Nieddu, T Ray, S Nic Chormaic and G Tkachenko
  Phys. Rev. Res. 2, 033341 (2020)

• Observation of the ⁸⁷Rb 5S_1/2 to 4D_3/2 electric quadrupole transition at 516.6 nm mediated via an optical nanofibre
  T Ray, RK Gupta, V Gokhroo, JL Everett, T Nieddu, KS Rajasree and S Nic Chormaic
  New J. Phys. 22, 062001 (2020)

Micro- and nanoplastic in Okinawa: Potential impacts on planktonic microalgae and endosymbiotic dinoflagellates

Graduated PhD 2020

Publications

• Analysis of small microplastics in coastal surface water samples of the subtropical island of Okinawa, Japan
  C Ripken, S Nic Chormaic and DG Kotsifaki
  Sci. Total Environ. 760, 143927 (2021) 

• Response of coral reef dinoflagellates to nanoplastics under experimental conditions
  C Ripken, E Shoguchi and K Khalturin
  Microorganisms 8, 1759 (2020)

Rydberg excitation and other multiphoton processes in cold rubidium atoms near an optical nanofibre

Graduated PhD 2024

Publications

• 1.6 GHz frequency scanning of a 482 nm laser stabilized using electromagnetically induced transparency 
  KP Subramonian Rajasree, K Karlsson, T Ray and S Nic Chormaic 
  Photon. Technol. Lett. 33, 780 (2021)

• Spin selection in single-frequency two photon excitation of alkali-metal atoms
  KS Rajasree, RK Gupta, V Gokhroo, F Le Kien, T Nieddu, T Ray, S Nic Chormaic and G Tkachenko
  Phys. Rev. Res. 2, 033341 (2020)

• Observation of the ⁸⁷Rb 5S_1/2 to 4D_3/2 electric quadrupole transition at 516.6 nm mediated via an optical nanofiber
  T Ray, RK Gupta, V Gokhroo, JL Everett, T Nieddu, KS Rajasree and S Nic Chormaic
  New J. Phys. 22, 062001 (2020)

• Generation of cold Rydberg atoms at submicron distances from an optical nanofiber
  KS Rajasree, T Ray, K Karlsson, JL Everett and S Nic Chormaic
  Phys. Rev. Res. 2. 012038(R) (2020).

• Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S_1/2 to 6S_1/2 transition using one-color two-photon excitation
  T Nieddu, T Ray, KS Rajasree, R Roy and S Nic Chormaic
  Opt. Express 27, 6528 (2019)

Optical fiber probes for in-vivo neuronal compressive microendscopy and mode analysis in nanofibers

Graduated PhD 2019

Publications

• Fiber-bundle-basis sparse reconstruction for high resolution wide-field microendoscopy
  SP Mekhail, N Abudukeyoumu, JM Ward, G Arbuthnott and S Nic Chormaic
  Biomed. Opt. Express 9, 1843 (2018)

• Advances in fibre microendoscopy for neuronal imaging
  SP Mekhail, G Arbuthnott and S Nic Chormaic
  Opt. Data Process. Storage 2, 30 (2016)

• Fiber bundle in-vivo epifluorescence microscopy with image reconstruction
  SP Mekhail, O Jáidar, G Arbuthnott and S Nic Chormaic
  Biomedical Optics 2016, OSA Technical Digest (online) (Optical Society of America, 2016), paper JW3A.26

Patents

• Z-axis optical microdrive
  SP Mekhail, B Sieveritz, P Kennedy, GW Arbuthnott and S Nic Chormaic
  USA Provisional Patent Filed 63/003,769 (2020)

Hollow whispering gallery mode resonators: from fabrication to application

Graduated PhD 2019

Publications

• Raman laser switching induced by cascaded light scattering
  S Kasumie, F Lei, JM Ward, X Jiang, L Yang and S Nic Chormaic
  Laser Photonics Rev. 13, 1900138 (2019)

• Toward visible frequency comb generation using a hollow WGM resonator (invited review)
  S Kasumie, Y Yang, JM Ward and S Nic Chormaic
  Rev. Las. Engin. 46, 92 (2018)

• Tunable erbium-doped microbubble laser fabricated by sol-gel coating
  Y Yang, F Lei, S Kasumie, L Xu, J Ward, L Yang and S Nic Chormaic
  Opt. Express 25, 1308 (2017)

• Cavity ring-up spectroscopy for dissipative and dispersive sensing in a whispering gallery mode resonator
  Y Yang, R Madugani, S Kasumie, JM Ward and S Nic Chormaic
  Appl. Phys. B 122, 291 (2016)

• Four-wave mixing parametric oscillation and frequency comb generation at visible wavelengths in a silica microbubble resonator
  Y Yang, X Jiang, S Kasumie, G Zhao, L Xu, J Ward, L Yang and S Nic Chormaic
  Opt. Lett. 41, 5266 (2016)

Optical nanofibers for multiphoton processes and selective mode interactions with rubidium 

Graduated PhD 2019

Publications

• Spin selection in single frequency, two photon excitation of alkali atoms
  KS Rajasree, RK Gupta, V Gokhroo, F Le Kien, T Nieddu, T Ray, S Nic Chormaic and G Tkachenko  
  Phys. Rev. Res. 2, 033341 (2020)

• Observation of the ⁸⁷Rb 5S_1/2 to 4D_3/2 electric quadrupole transition at 516.6 nm mediated via an optical nanofibre
  T Ray, RK Gupta, V Gokhroo, JL Everett, T Nieddu, KS Rajasree and S Nic Chormaic
  New J. Phys. 22, 062001 (2020)

• Enhancement of the quadrupole interaction of an atom with guided light of an ultrathin optical fiber
  F Le Kien, T Ray, T Nieddu, T Busch and S Nic Chormaic
  Phys. Rev. A 97, 013821 (2018)

• Simple, narrow, and robust atomic frequency reference at 993 nm exploiting the rubidium (Rb) 5S_1/2 to 6S_1/2 transition using one-color two-photon excitation
  T Nieddu, T Ray, KS Rajasree, R Roy and S Nic Chormaic
  Opt. Express 27, 6528 (2019)

• Optical nanofibres and neutral atoms 
  T Nieddu, V Gokhroo and S Nic Chormaic
  J. Opt. 18, 053001 (2016)

Light-induced interactions using optical near-field devices

Graduated PhD 2017

Publications

• Evanescent field trapping of nanoparticles using nanostructured ultrathin optical fibers
  M Daly, VG Truong and S Nic Chormaic
  Opt. Express 24, 14470 (2016)

• Optical trapping and manipulation of micrometer and submicrometer particles
  M Daly, M Sergides and S Nic Chormaic
  Laser Photonics Rev. 9, 309 (2015)

• Nanostructured optical nanofibre for atom trapping
  M Daly, VG Truong, CF Phelan, K Deasy and S Nic Chormaic
  New J. Phys. 16, 053052 (2014)

• Sub-Doppler temperature measurements of laser-cooled atoms using optical nanofibres
  L Russell, K Deasy, MJ Daly, MJ Morrissey and S Nic Chormaic
  Meas. Sci. Technol. 23, 015201(2012)