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Nonlinear Symmetry Breaking to Enhance the Sagnac Effect in a Microresonator Gyroscope
Thariq Shanavas, Gregory Krueper, Jiangang Zhu +2
Optical gyroscopes based on the Sagnac effect have been widely used for inertial navigation in aircrafts, submarines, satellites and unmanned robotics. With the rapid progress in t…
Interfacing whispering-gallery microresonators and free space light with cavity enhanced Rayleigh scattering
Jiangang Zhu, Sahin Kaya Ozdemir, Huzeyfe Yilmaz +5
Whispering gallery mode resonators (WGMRs) take advantage of strong light confinement and long photon lifetime for applications in sensing, optomechanics, microlasers and quantum o…
Infrared light detection using a whispering-gallery-mode optical microcavity
Jiangang Zhu, Sahin Kaya Ozdemir, Lan Yang
We demonstrate a thermal infrared (IR) detector based on an ultra-high-quality-factor (Q) whispering-gallery-mode (WGM) microtoroidal silica resonator, and investigate its performa…
Raman-gain induced loss-compensation in whispering-gallery-microresonators and single-nanoparticle detection with whispering-gallery Raman-microlasers
Sahin Kaya Ozdemir, Jiangang Zhu, Xu Yang +6
Recently optical whispering-gallery-mode resonators (WGMRs) have emerged as promising platforms to achieve label-free detection of nanoscale objects and to reach single molecule se…
Optical Detection of Single Nanoparticles with a Sub-wavelength Fiber-Taper
Jiangang Zhu, Sahin Kaya Ozdemir, Lan Yang
A nanoparticle detection scheme with single particle resolution is presented. The sensor contains only a taper fiber thus offering the advantages of compactness and installation fl…
Statistics of multiple-scatterer induced frequency splitting in whispering gallery microresonators and microlasers
Lina He, Sahin Kaya Ozdemir, Jiangang Zhu +3
We investigate numerically and experimentally the statistics of the changes in the amount of frequency splitting upon the adsorption of particles one-by-one into the mode volume of…
Detection and size measurement of individual hemozoin nanocrystals in aquatic environment using a whispering gallery mode resonator
Woosung Kim, Sahin Kaya Ozdemir, Jiangang Zhu +3
We, for the first time, report the detection and the size measurement of single nanoparticles (i.e. polystyrene) in aquatic environment using mode splitting in a whispering gallery…
Photonic molecules formed by coupled hybrid resonators
Bo Peng, Sahin Kaya Ozdemir, Jiangang Zhu +1
We describe a method that enables free-standing whispering-gallery-mode microresonators, and report spectral tuning of photonic molecules formed by coupled free and on-chip resonat…
Detecting single viruses and nanoparticles using whispering gallery microlasers
Lina He, Sahin Kaya Ozdemir, Jiangang Zhu +2
Detection and characterization of individual nano-scale particles, virions, and pathogens are of paramount importance to human health, homeland security, diagnostic and environment…
Observation and characterization of mode splitting in microsphere resonators in aquatic environment
Kim Woosung, Sahin Kaya Ozdemir, Jiangang Zhu +1
Whispering gallery mode (WGM) optical resonators utilizing resonance shift (RS) and mode splitting (MS) techniques have emerged as highly sensitive platforms for label-free detecti…
Estimation of Purcell factor from mode-splitting spectra in an optical microcavity
Sahin Kaya Ozdemir, Jiangang Zhu, Lina He +1
We investigate scattering process in an ultra-high-Q optical microcavity coupled to subwavelength scatterers by introducing "splitting quality" Qsp, a dimensionless parameter defin…
Demonstration of mode splitting in an optical microcavity in aqueous environment
Woosung Kim, Sahin Kaya Ozdemir, Jiangang Zhu +2
Scatterer induced modal coupling and the consequent mode splitting in a whispering gallery mode resonator is demonstrated in aqueous environment. The rate of change in splitting as…
Ultra-sensitive detection of mode splitting in active optical microcavities
Lina He, Sahin Kaya Ozdemir, Jiangang Zhu +1
Scattering induced mode splitting in active microcavities is demonstrated. Below the lasing threshold, quality factor enhancement by optical gain allows resolving, in the wavelengt…
Self-pulsation in fiber-coupled on-chip microcavity lasers
Lina He, Sahin Kaya Ozdemir, Jiangang Zhu +1
We report self-pulsation in an erbium-doped silica toroidal microcavity laser coupled to a tapered fiber and investigate the effects of pump power and taper-cavity coupling conditi…
Scatterer induced mode splitting in poly(dimethylsiloxane) coated microresonators
Lina He, Sahin Kaya Ozdemir, Jiangang Zhu +1
We investigate scatterer induced mode splitting in a composite microtoroidal resonator (Q ~ 10^6) fabricated by coating a silica microtoroid (Q ~ 10^7) with a thin poly(dimethylsil…
Controlled Manipulation of Mode Splitting in an Optical Microcavity by Two Rayleigh Scatterers
Jiangang Zhu, Sahin Kaya Ozdemir, Lina He +1
We report controlled manipulation of mode splitting in an optical microresonator coupled to two nanoprobes. It is demonstrated that, by controlling the positions of the nanoprobes,…
On-chip Single Nanoparticle Detection and Sizing by Mode Splitting in an Ultra-high-Q Microresonator
Jiangang Zhu, Sahin Kaya Ozdemir, Yun-Feng Xiao +4
The ability to detect and size individual nanoparticles with high resolution is crucial to understanding behaviours of single particles and effectively using their strong size-depe…