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Concatenation of two different higher-order-mode fibers (HOMFs) was used to extend the soliton wavelength shift beyond the mode-crossing wavelengths of the fibers. A 3.5 nJ, 55 fs soliton was obtained at 1170 nm.
We use plasmonic antenna arrays to unidirectionally couple incident light in two different polarization states to long-range surface plasmon polariton waveguide modes propagating in opposite directions. The structures enable polarization-sorting with extinction rates in excess of 30dB.
A novel athermal scheme based on resonance splitting of dual-ring structure is proposed and proved. An athermal resonator based on this scheme is demonstrated, achieving athermal transmission over a temperature range of at least 40K.
We present a polarization rotator and coupler that rotates the TE0 mode in a silicon waveguide and couples to the hybrid plasmonic (HP0) mode. Coupling factor of ∼ 60% and polarization conversion efficiency of ∼ 90% is achieved.
New results on integration of colloidal quantum dots (QDs) into SiN microstructures are reported, including QD positioning with nanometric accuracy and the efficient coupling of their emission to waveguides and cavities. The results are relevant to on-chip quantum optics and information processing.
Increasing coupling of terahertz radiation into a low dispersion, broadband two-wire waveguide is an important issue to address. To resolve this, we demonstrate an active two-wire waveguide with higher performance compared to its passive counterpart.
We designed and fabricated silicon nitride micordisk-waveguide vertical coupling devices processed at a low temperature of 270°. We experimentally demonstrate an intrinsic quality factor of 7.2×104 in the disk with only 15µm radius operating near 1310nm.
We present the design and realization of strong light-matter coupling in monolithic metamaterial nanocavities. We achieve a Rabi frequency of 2.5 THz (corresponding to a polariton splitting of 20%) in a mode volume of 1.34×10−3(λ/n)3.
We demonstrate cavity-enhanced HHG with a tailored transverse mode simultaneously allowing for efficient conversion to the XUV and for unparalleled output coupling efficiencies. Due to its purely geometric nature, this method is power scalable.
In the strong coupled cavity optomechanics, we find the island structure in the temporal evolution map of mean phonon number. Analytical results are provided to obtain the optimal cooling limits with the frequency matching condition.
The spin state of the silicon-vacancy centre in diamond and its optical accessibility have so far remained elusive. We here evidence spin-tagged fluorescence through resonant optical access to the electronic spin ½ of the centre.
We demonstrate theoretically and experimentally the Rashba effect using light in two “counterpropagating” photonic lattices. We observe breaking of inversion symmetry in the resulting band structure.
An optomechanical crystal nanobeam cavity with high optomechanical coupling rate is proposed and fabricated. Only by adjusting the radius of the air holes, the cavity realizes an optomechanical coupling rate as high as 1.24 MHz.
We demonstrate, for the first time, the controlled coupling of rolled-up microtubes integrated with silicon waveguides by thermally tuning the coupling gap. Then we realize coupling modulation utilizing the dynamic tuning effect.
We have developed an optical switch with a quantum dot in a high Q-factor microcavity. Experimental reflectivity spectroscopy fitted by a semi-analytical model estimates the intracavity photon number required to switch the device as 0.13.
We show, with numerical verification, how an ensemble of Rubidium atoms can be made to behave like a single particle with only two energy levels, i.e., a quantum bit, by using Rydberg-interaction assisted light-shift blockade.
We demonstrate strong anharmonicity of the polariton dressed states in a highly dissipative cavity quantum electrodynamics system via dark state resonances. Vacuum Rabi oscillation and photon blockade occur even for decay-to-interaction rate ratio exceeding 100.
An yttrium orthosilicate nanophotonic resonator is fabricated with resonances near the 4I9/2-4F3/2 hyperfine transition of Neodymium ions. Measured absorption by Neodymium embedded in a nanobeam indicates promising prospect for coupling ions to our nano-resonator.
We present an investigation of the far-off-resonant coupling between a semiconductor quantum dot and a cavity. We show that the enhanced coupling observed in experiments is explained by Coulomb interactions with wetting layer carriers.
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