Design and simulation of photonic crystals for temperature reading of ultra-small structures

Güney, Durdu Ö.; Demirci, Tuğba; Isci, Senol; Gürbüz, Yaşar; Incı, Mehmet Nacı

doi:10.1109/leos.2001.969248

Cited by 1 publication

(1 citation statement)

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“…Q1, Q, which are explained below), F is the coupling constant to the point-defect region from the PBG waveguide, X is the coupling of the photons to the photonic crystal structure from outside of the slab, 0 is the transmission response of the micromachined lens to be used as collecting optics, IT is a scaling factor due to the TE polarizer, and R is the power loss components including the emissivity and target-to-detector distance. X (tm) 1 Table 1 : Calculated input and output radiations and coupling ratios corresponding to the resonant wavelengths in the first column are illustrated. Second colunm gives the corresponding defect radii, while the third colunm indicates the relative power coupling for these defects, which is calculated by the 2D FDTD method, in terms of a constant F. In the fourth and fifth columns are given the input radiation in blackbody radiation form and output radiation, which is emitted from the crystal structure, respectively.…”

Section: Methods and Resultsmentioning

confidence: 99%

<title>Two-dimensional photonic crystal for surface temperature reading of miniature systems</title>

2002

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A two-dimensional (2D) photonic band gap (PBG) structure was utilized for the temperature mapping of ultra-small structures, such as microelectromechanical systems (MEMS). Optical properties of GaAs were considered in the design of the device since GaAs is nearly transparent and lossless in the chosen infrared region, and also has a reasonably high dielectric constant of 1 1 .4. The structure consists of a triangular lattice of air holes etched into GaAs, with a lattice constant, a, of 0.382-um, including one linear waveguide and three isolated point defects with radii 0.5 la, O.54a, and O.57a, respectively. The operational principle of the device is based on guiding and selecting the specifically tuned wavelengths through the corresponding point defects. It has been shown that having processed the intensities, obtained from each defect, in accordance with the blackbody radiation characteristics and the transmission properties of the device, the temperature reading of the target in concern can be obtained. Despite many studies concerning guided modes in 2D PBG materials, few sensor applications exist in the literature. Future work on defects, taking advantage of strongly directional behaviour, frequency selectivity and specific polarization, will highlight the much richer possibilities ofthe PBG technology for novel applications in the fields from optical MEMS to quantum computing.

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Section: Methods and Resultsmentioning

confidence: 99%