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Higher-order (fifth and seventh order) coherent anti-Stokes Raman scattering microscopy is demonstrated to break the diffraction limit for label-free super-resolution vibrational imaging for live cells such as HeLa and buccal cells.
By driving ultrafast soliton molecules with an all-optical external perturbation and monitoring their response in real time, a form of spectroscopy of soliton molecules akin to optical spectroscopy of chemical bonds is introduced.
Semiconductor nanocrystals with efficient tunable emission in the 1,000–1,700 nm window could prove useful for applications in deep biological imaging and sensing.
An amplitude squeezed light source that operates down to 1 kHz frequencies—the lowest squeezing frequency—is generated in nonlinear crystal-based systems. By injecting the squeezed light into a microresonator, the quantum radiation pressure noise is reduced by 1.2 dB.
By exploiting the electro-optic properties of thin-film lithium niobate, an integrated single-waveguide Fourier transform spectrometer with a footprint of <10 mm2 and an operational bandwidth of 500 nm in the near- and short-wavelength infrared is demonstrated.
Unusual photoemission from graphene is explained by the emission of hot electrons. The findings may lead to integrated photonic devices driven by hot-electron emission.
By employing a Doppler cancellation technique, optical frequency synthesis is achieved with stability and accuracy in the 10−20 range within 100 s. An offset between two optical frequency combs phase-locked at 1,542 nm is obtained as 5.4 × 10−21 at 1,063 nm within 105 s.
Responses to high-intensity mid-infrared laser light are theoretically investigated in the Haldane system. It is found that the primary electronic response, optical tunnelling and high-harmonic emission are sensitive to the topological phase of matter.
Parity–time symmetry in second quantization is demonstrated in an integrated non-Hermitian coupled waveguide structure. A counterintuitive shift of the position of the Hong–Ou–Mandel dip is observed in integrated lossy waveguide structures.
Using graphene as the ‘metal’ layer can increase the localization accuracy of metal-induced energy transfer, enabling axial localization of single emitters and measurement of the thickness of lipid bilayers with ångström accuracy.
The quantum-delayed choice experiment is implemented with multiple entangled photons under Einstein’s locality condition. The wave–particle quantum superposition is realized by controlling the relative phase between the wave and particle states.
A violation of bilocal inequality is demonstrated with two truly independent light sources delivering entanglements to three nodes. To this end, the locality, measurement independence and quantum source independence loopholes are closed simultaneously.
A phase-control technique based on the use of fast one-dimensional (1D) spatial light modulators and a 1D-to-2D transformation enables high-speed wavefront measurements and manipulation in complex media, facilitating real-time applications such as imaging in live tissue.
Blue light-emitting diodes based on perovskite nanostructures embedded within quasi-two-dimensional phases show highly effective charge injection and suppressed non-radiative recombination.
By synthesizing undistorted cross-sectional image reconstructions from multiple conventional images acquired with angular diversity, optical coherence refraction tomography offers greater than threefold improvement in lateral resolution and speckle reduction in imaging tissue ultrastructure, and reconstructs the tissue’s internal refractive index distribution.