access icon free Realisation of one-dimensional (Si/SiO2) N PC filter in visible light band

The work proposes a one-dimensional photonic crystal (PC) filter with (Si/SiO2) N structure, which is used to filter in the visible light band. The optical properties are simulated theoretically by using the transfer matrix method. Propagating properties under different incident angles and different period numbers for both Transverse Electric (TE) mode and Transverse Magnetic (TM) mode are studied. A photonic bandgap (PBG) is found between 450 and 700 nm. For both TE and TM modes, the blue shift can be found as the incident angle increases. The PC films are prepared by radio-frequency (RF) magnetron sputtering experimentally. The experimental results are in accordance with the simulation results. The results indicate that the PBG is related to the incident angle and the period number, and increasing the period number is a feasible way to ensure the stability of the PBG. The studies are beneficial to the design of the PC filter in the future.

Inspec keywords: photonic crystals; optical design techniques; silicon compounds; sputter deposition; spectral line shift; transfer function matrices; silicon; elemental semiconductors; optical filters; photonic band gap; optical films

Other keywords: TE mode; one-dimensional photonic crystal filter; Si-SiO2; incident angles; photonic crystal films; optical properties; period numbers; transfer matrix method; blue shift; radiofrequency magnetron sputtering; photonic bandgap; TM mode; visible light band; PBG; propagating properties

Subjects: Sputter deposition; Optical system design; Optical coatings and filters; Photonic bandgap materials; Optical materials; Deposition by sputtering; Spectral and other filters; Thin film growth, structure, and epitaxy; Optical coatings; Photonic band gap (condensed matter)

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http://iet.metastore.ingenta.com/content/journals/10.1049/mnl.2018.5282
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