Magnetic field modulation of intense surface plasmon polaritons

Abstract

We present correlated experimental and theoretical studies on the magnetic field modulation of Surface Plasmon Polaritons (SPPs) in Au/Co/Au trilayers. The trilayers were grown by sputter deposition on glass slides with the Co films placed at different distances from the surface and with different thickness. We show that it is possible to tailor Au/Co/Au trilayers with the critical thickness needed for optimum excitation of SPPs leading to large localized electromagnetic fields. The modification of the SPP wave vector by externally applied magnetic fields was investigated by measuring the magneto-optical activity in transverse configuration. In addition, using magneto-optics as a tool we determined the spatial distribution of the SPP generated electromagnetic fields within Au/Co/Au samples by analyzing the field-dependent optical response, demonstrating that it is possible to excite SPPs that exhibit large electromagnetic fields that are also magneto-optically active and therefore can be modulated by externally applied magnetic fields.

Spectral dependence of the magnetic modulation of surface plasmon polaritons in noble/ferromagnetic/noble metal films

“…This has led to the combination of noble and ferromagnetic metals as suitable magnetoplasmonic systems. 15,16,[28][29][30][31] The possibility of realizing magnetic field driven SPP modulators has been recently demonstrated using this kind of system. 15 Moreover, the modulation can be increased with the addition of a thin dielectric layer on top of the metallic multilayer, 16 or by optimizing the quality of the interfaces.…”

Niobium thin film deposition studies on copper surfaces for superconducting radio frequency cavity applications

“…This system is a five port Perkin-Elmer molecular beam epitaxy system that has been modified to house sputtering guns. Growth conditions such as geometry, deposition rate, and temperature are remarkably reproducible with the instrument used, thus allowing accurate comparison between samples grown in different runs including thickness series with subnanometer differences between samples [4]. For the present study, the growth was carried out using a 99.95% pure 2 inch Nb target with a balanced magnetron at an Ar pressure of 1 mTorr with a target to sample distance was fixed at 7.75 inches, resulting in a growth rate of 0:36 A=s.…”

Optical Effects Induced by Bloch Surface Waves in One-Dimensional Photonic Crystals

“…The magnitude of these effects is small, but it can be significantly enhanced near narrow optical resonances in the structures [45][46][47][48][49][50][51]. An appropriate resonant optical state for this purpose is the Bloch surface wave in magneto-photonic crystals (MPCs).…”