Diamond photonic crystals for the IR spectral range

Abstract

2D photonic crystals formed inside monocrystalline diamond to operate in the IR spectral range are reported. The photonic structures consisting of 150-μm-long graphitized wires arranged in a square matrix with a period of 4 μm were produced by laser writing with ultrashort pulses. Transmittance spectra (λ=1-14 μm) measured for the structures with increasing thickness demonstrate the occurrence of few minima being different for TM and TE polarization modes. Complex refraction index of the laser-modified material was evaluated for the first time in order to be used in computer simulation of the structures.

Photoionization of monocrystalline CVD diamond irradiated with ultrashort intense laser pulse

“…This is achieved in the femtosecond range, from 400 fs to 30 fs with apparently no damage of the surrounding diamond lattice that has been reported to occur in the nanosecond range 1, 4 . The interest is mainly focused in producing radiation tolerant detectors in high energy physics and small field dosimeters for radiotherapy, although other applications as IR photonic crystals 5,6 and microsystem devices 7 have also been proposed. 3D diamond detectors combine the intrinsic properties of radiation tolerance of diamond with the advantages of the 3D architecture.…”

Laser Ablated Nanocrystalline Diamond Membrane for Infrared Applications

“…For example, materials, such as KBr and NaCl, are transparent in the wavelength range up to ∼20 m, but have very low strength; ZnSe and ZnS are transparent up to ∼15 microns, but their strength is still low; more traditional materials for photonics, such as Si and Ge, are quite strong, but they are transparent only up to ∼9 m and ∼13 m, respectively. Due to the transparency of diamond at wavelengths >6 m [ 17 ] and record values of hardness, it is a promising material for IR photonics [ 18 , 19 ]. For IR applications mentioned above, we need to use the diamond membranes with an aperture of about 1 mm and with thickness providing the propagation of quasi-waveguide modes, which corresponds to the range of 5–9 m. Specifically, nanocrystalline diamond (NCD) film is perfect for this goal.…”

“…As a result of local laser action, graphitized material is formed on the surface or in the bulk of a diamond (depending on irradiation conditions). This method allows obtaining structures that have opposite optical and electrical properties of diamond and graphite and is already successfully used, for example, to design detectors of ionizing radiation [ 29 , 30 , 31 , 32 ] and photonic crystals [ 17 ] based on single crystal diamond, and optical elements of the terahertz range [ 33 , 34 ] based on polycrystalline diamond. However, despite the presence of works dedicated to the studies of laser-induced changes in conductivity [ 35 ], and optical properties [ 35 , 36 ], and of laser-induced ablation of nanocrystalline diamond films [ 37 , 38 ], laser radiation was not used to make optical elements based on NCD.…”

All-carbon diamond/graphite metasurface: Experiment and modeling

“…A new approach to THz metamaterial structures is based on a laser direct-write of metal-less graphitic-like structures on the surface of a CVD-grown polycrystalline diamond. 7 This method of diamond modification is very flexible; it allows one to fabricate arbitrary complex graphitized meta-structures on the polycrystalline diamond surface and even buried inside the material bulk, such as demonstrated 8 for IR range (1-14 lm). Compared with the well known direct laser-writing by multiphoton polymerization, 9 our method is really a one-step process to fabricate composite metal/dielectric meta-structures.…”