Tunable resonance transmission modes in hybrid heterostructures based on porous silicon

Abstract

In this work, we report the experimental results and theoretical analysis of strong localization of resonance transmission modes generated by hybrid periodic/quasiperiodic heterostructures (HHs) based on porous silicon. The HHs are formed by stacking a quasiperiodic Fibonacci (FN) substructure between two distributed Bragg reflectors (DBRs). FN substructure defines the number of strong localized modes that can be tunable at any given wavelength and be unfolded when a partial periodicity condition is imposed. These structures show interesting properties for biomaterials research, biosensor applications and basic studies of adsorption of organic molecules. We also demonstrate the sensitivity of HHs to material infiltration.

Theoretical and Experimental Study of Optical Losses in a Periodic/Quasiperiodic Structure Based on Porous Si-SiO2

“…Periodic/quasiperiodic structures designed in the infrared have been studied [36,37], where PS structures are considered a material without optical losses. However, it has been demonstrated that light scattering by the pores and the interfaces between layers play a much more critical role than the infrared region's light absorption [38] since the extinction coefficient of crystalline silicon tends to zero [39].…”

Periodic and quasi-periodic one-dimensional phononic crystal biosensor: a comprehensive study for optimum sensor design

“…So far, solid-solid and solid-uid combinations have been considered through the designs of quasiperiodic structures in 1D and 2D PnCs. [27][28][29][30] Therefore, the quasiperiodic PnCs seem to be attractive candidates for overcoming the low-frequency restrictions of acoustic structures. Meanwhile, the Fibonacci sequence is considered one of the most signicant and well-known contributors in quasiperiodic PnCs structures 27,28 These quasi-periodic PnCs offer self-likeness energy spectrum, localization, as well as efficient and tunable PnBGs.…”

A promising ultra-sensitive CO2 sensor at varying concentrations and temperatures based on Fano resonance phenomenon in different 1D phononic crystal designs

“…To create omnidirectional band gaps, as well as large phononic/photonic band gaps, these quasi-periodic structures could function more efficiently compared to the periodic designs. Solid–solid and solid–fluid structures have so far been created in 1D and 2D PhCs with quasi-periodic structures 65 , 68 , 70 , 71 . The available literature about the 1D or the 2D PnCs sensors does not include the Fano resonance phenomenon.…”