Single-beam inscription of plasmon-induced surface gratings

Two Beam Interferometric Inscription of UV femtosecond Fiber Bragg Gratings

The inscription of fiber Bragg gratings with femtosecond laser radiation gives access to a wide range of new materials beyond conventional UV-photosensitive and special hydrogen loaded materials. We have therefore investigated the use of an interferometric technique in combination with UV femtosecond laser pulses to generate fiber Bragg gratings in different types of fibers. Additionally, the t...

Surface-plasmon holographic beam shaping.

Surface plasmon polaritons and free-space beams are often coupled through periodic gratings. Here we show that by employing holographic-based techniques for modulating the grating, one can systematically control the amplitude and phase of the free-space beam. Alternatively, arbitrarily shaped surface plasmon can be generated. By using gratings with different periods for the input and output cou...

Tunable directive radiation of surface-plasmon diffraction gratings.

We experimentally demonstrate tunable radiation from a periodic array of plasmonic nanoscatterers, tailored to convert surface plasmon polaritons into directive leaky modes. Extending our previous studies on efficient directional beaming based on leaky-wave radiation from periodic gratings driven by a subwavelength slit, we experimentally show dynamic beam sweeping by tuning the directional lea...

Optomechanical beam steering by surface plasmon nanoantenna

Surface plasmon-polariton resonances in metal-coated polycarbonate gratings

In this article a study of surface plasmon resonance (SPR) is presented using a diffraction grating to couple light on the dielectric–metal interface. A polycarbonate surface relief gratings obtained from commercially available DVD-R stampers are used as substrates and are subsequently coated with silver and gold thin films (with physical thickness d = 15-25 nm) . The presence of SPR is experim...