9 research outputs found
Bloch Surface Wave Photonic Device Fabricated by Femtosecond Laser Polymerisation Technique
No full textWe applied femtosecond laser polymerisation technique to fabricate a novel Bloch surface wave integrated photonic device with a compact coupling scheme. The device consisted of a waveguide, coupling and decoupling gratings and focusing and defocusing triangles. We manufactured an array of devices with varying geometrical parameters of waveguide. Excitation and propagation of Bloch surface wave waveguide modes were studied by direct and back focal plane imaging. The obtained results prove that the maskless and flexible femtosecond laser polymerisation technique may be applied for fabrication of Bloch-surface-wave based integrated photonics
Ultrafast light-scattering dynamics of resonant semiconductor GaAs metasurfaces (Conference Presentation)
No full textMie-driven directional nanocoupler for Bloch surface wave photonic platform
Get PDFModern integrated photonic platforms should combine low-loss guiding, spectral flexibility, high light confinement, and close packing of optical components. One of the prominent platforms represents a one-dimensional photonic crystal combined with dielectric nanostructures that manipulate low-loss Bloch surface waves (BSWs). Proper design of nanostructures gives rise to a variety of optical resonances suitable for efficient capturing and controlling light. In this work, we achieve color-selective directional excitation of BSWs mediated by Mie resonances in a semiconductor nanoparticle. We show that a single silicon nanoparticle can be used as a subwavelength multiplexer switching the BSW excitation direction from forward to backward within the 30 nm spectral range with its central wavelength governed by the nanoparticle size. Our work opens a route for the on-demand fabrication of photonic nanocouplers with tailored optical properties and submicron footprint
Goos–Hänchen Shift Spatially Resolves Magneto-Optical Kerr Effect Enhancement in Magnetoplasmonic Crystals
No full textWe report on how observation of the Goos–Hänchen
(GH) shift can be used to spatially resolve the transverse magneto-optical
Kerr effect (TMOKE) enhancement in all-nickel magnetoplasmonic crystals
(MPCs). First, the excitation of surface plasmons in the MPCs leads
to a 15.3 μm (18λ) GH shift. Then, in the presence of
a transverse magnetic field, the modulation of the lateral spatial
intensity distribution of the reflected light [TMOKE(x)], caused by the GH shift, reaches 4.7% in the experiment. The spatially
resolved TMOKE(x) values are several times higher
compared to those from conventional TMOKE measurements in the MPCs.
The concept of the spatially resolved magneto-optical effects under
GH shift can be further extended to other magnetophotonic nanodevices
for additional enhancing magneto-optical effects, sensing, and light
modulation applications
Nonlinear polymer/quantum dots nanocomposite for two-photon nanolithography of photonic devices
No full textLaser printing of spherical silicon nanoparticles for in-plane color routing
No full textFemtosecond laser printing allows the creation of spherical nanoparticles on a wide range of substrates. Here we apply this technique to fabricate Mie-resonant color-routing nanoantennas. First, we place single silicon particles on a dielectric multilayer and demonstrate color-selective directional excitation of Bloch surface waves. Second, we create asymmetric dimers of silicon nanospheres that provide color-selective directional scattering of evanescent waves. Our results highlight the potential of laser printing as an advanced fabrication technique for integrated optics
