Tuning thermal emission in metamaterials composed by oriented polar inclusions

We investigated a metamaterial composed by silicon carbide (SiC) subwavelength oriented wires, onto silicon substrate in the mid- to long- infrared range. A simple but versatile method was developed and implemented, combining homogenization techniques with the transfer matrix method for birefringent layered materials to model an effective medium layer where different inclusions content (filling factor) as well as different shape and orientation of inclusions (depolarization factors) are taken into account. The typical spectral features associated to oriented inclusions are thus exploited to design a selective emissivity feature, pertaining sharp resonances at infrared wavelengths. Taming and tuning the strength and the position of the phonon resonance of polar materials allows the design of versatile optical elements and infrared filters, in order to design an effective medium with specifically tuned emissive properties.

[1]  Bong Jae Lee,et al.  Coherent thermal emission from one-dimensional photonic crystals , 2005 .

[2]  Stefan A. Maier,et al.  Low-loss, infrared and terahertz nanophotonics using surface phonon polaritons , 2015 .

[3]  Stefano Paoloni,et al.  Self consistently calibrated photopyroelectric calorimeter for the high resolution simultaneous absolute measurement of the specific heat and of the thermal conductivity , 2012 .

[4]  Concita Sibilia,et al.  Infrared properties of randomly oriented silver nanowires , 2012 .

[5]  Mario Bertolotti,et al.  Aligned Ag nanowires for radiation manipulation: efficient and broadband infrared polarizing beam splitter , 2014 .

[6]  Daniele Chiappe,et al.  Asymmetric transmission and anomalous refraction in metal nanowires metasurface , 2012 .

[7]  Roberto Li Voti,et al.  Picosecond time scale imaging of mechanical contacts. , 2010, Ultrasonics.

[8]  Daniele Chiappe,et al.  Evidence of anomalous refraction of self-assembled curved gold nanowires , 2012 .

[9]  Mario Bertolotti,et al.  Midinfrared thermal emission properties of finite arrays of gold dipole nanoantennas , 2015 .

[10]  John B. Shoven,et al.  I , Edinburgh Medical and Surgical Journal.

[11]  M. Larciprete,et al.  Photothermal probing of inhomogeneously modulated transparent thin films , 2002 .

[12]  Ari Sihvola,et al.  Homogenization principles and effect of mixing on dielectric behavior , 2013 .

[13]  Roberto Li Voti,et al.  Selective and tunable thermal emission in metamaterials composed of oriented polar inclusions , 2017 .

[14]  S. Jones,et al.  Particle shape effects on the effective permittivity of anisotropic or isotropic media consisting of aligned or randomly oriented ellipsoidal particles , 2000 .

[15]  Kun Zhou,et al.  Recent progress in synthesis, properties and potential applications of SiC nanomaterials , 2015 .