Photonic bandpass filters: an ab-initio based study of quasiperiodicity and mirror symmetry effects

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Important Dates

Conference:

Apr. 22-24, 2019

Full Paper Due: Mar. 18, 2019

Abstract Due: Mar. 18, 2019

Audience Registration Due:
Apr. 22, 2019

Presentations of The Spring World Congress on Engineering and Technology (SCET 2017)

● Photonic bandpass filters: an ab-initio based study of quasiperiodicity and mirror symmetry effects
Author(s)
Vicenta Sanchez
Affiliation(s)
Universidad Nacional Autonoma de Mexico
KEYWORDS
Photonic bandpass filters, ab-initio based study, quasiperiodicity, mirror symmetry effects
ABSTRACT
The wave propagation through a dielectric medium has been shown to be very sensitive to its structure at wavelength scale [1]. In consequence, photonic devices based on dielectric layers ordered following the periodic or quasiperiodic sequence are capable of reflecting, confining, guiding or filtering lights, just as electrons and holes in electronic devices [2]. In this work, we report a comparative study of the light transmission in dielectric heterostructures with Fibonacci, Thue-Morse, Rudin-Shapiro, Triadic Cantor and Period-doubling sequences [1,3]. Furthermore, heterostructures with mirror symmetry can be obtained by concatenating an aperiodic multilayer to its mirror structure. For example, the sequence of a mirror Fibonacci multilayer can be written as ABAAB-BAABA. Within the quarter-wave condition, where the optical thickness of each layer is a quarter of the wavelength, we observe a perfect transmission sharp peak at the wavelength for multilayers with mirror symmetry. The full width at half maximum (FWHM) of this peak in a Fabry-Perot resonator is investigated in detail for analyzed periodic and aperiodic multilayers with mirror symmetry, keeping constant the total number of layer interfaces and the refraction-index ratio of layers A and B. The frequency dependent refraction indexes of both A and B layers were obtained from the Density Functional Theory (DFT) through CASTEP codes within the Materials Studio software, and the device optical transmittance was calculated by means of the transfer-matrix method. Finally, we also investigate the variation of transmittance spectra with the incident angle for both transversal electric (TE) and transversal magnetic (TM) polarizations. This work has been partially supported by UNAM-PAPIIT-IN114916. Computations were performed at Miztli of DGTIC-UNAM