  Microspectrometer features remarkable portability and integration, and is
prospected to provide quick detection tools to daily life and revolutionary
techniques to researchers. For the extremely finite footprint,
microspectrometer can hardly work to analyze the polarization feature by
placing polarizer in the optical path like conventional spectrometers. Here, we
demonstrate a novel 2D wavelength-polarization dispersive microspectroscope
based on carbon nanocoil with plasmonic Au nanopariticles (Au/CNC) as a
dispersive component. Explored by the microspectrum and Fourier-space
microscopy, a unique 2D dispersive characteristic of the Au/CNC is revealed.
Along the axis of the coil, Au/CNC disperses light as wavelength to bands of
different diffraction orders like a grating. Wavelength of the incident light
can be obtained from the position of the signal lines in a quite large
visible-near-infrared wavelength range with an acceptable resolution. In the
direction perpendicular to the axis of the coil, incident light is dispersed as
polarization with bright and dark areas. We can distinguish left- and
right-circularly-polarized light, and also obtain the polarization orientation
of linearly-polarized light. Based on this effect, a wonderful 2D
wavelength-polarization microspectrometer can be built. It not only fulfills
the wavelength analysis with a tiny dispersive component, but also
simultaneously knows the polarization feature of the incident light in one
shot. Moreover, this powerful tool can further evolve new revolutionary
techniques via integrated with other systems.

Optics;Mesoscale and Nanoscale Physics;Materials Science