High Q-factor plasmonic filter based on MIM structures and its application in the design of a dual band demultiplexer for optical communication wavelengths

Abstract

One of the key components in optical integrated circuits is bandpass filters. In this article, a scheme of plasmonic filters consisting of a nanodisk cavity coupled with two T -shaped metal–insulator–metal (MIM) waveguides is presented. The nanodisk cavity is in a square or rectangular shape. The effects of the geometrical parameters variations on the transmission spectrum are investigated. The results of the numerical simulation analysis indicate that the perfect transmission peak can be achieved by optimizing the structure parameters. Hence, the appropriate dimensions of this structure for operating in the optical communication wavelength range (from O to L bands) are obtained. Also, the proposed filter exhibits the transmission peak of 0.99 and the high quality factors ( Q -factors) of 91 and 109.25 at the wavelengths of 1550 nm and 1310 nm, respectively. In addition, a design of two-channel demultiplexer is presented, in which the waveguides are connected by T or Y junctions. The results show that the proposed structure exhibits the transmission peaks of 0.8 and 0.67 and the Q -factors of 65 and 103.3 at the resonance wavelengths of 1310 nm and 1550 nm, respectively.

WITHDRAWN: Tunable and High Transmission Efficiency Metal-Insulator-Metal Power Splitter and Dual Wavelength Division Multiplexer

“…Several different Nano-guiding MIM devices based on SPPs have been investigated in recent years such as filters [8][9][10][11][12][13][14][15], power splitters [16][17][18][19][20][21], Y-shaped combiners [22], directional couplers [2,23] and plasmonic refractive index sensors [24][25][26][27][28]. There have also been extensive efforts in designing WDMs based on MIM plasmonic waveguides [29][30][31][32][33][34].…”

Ultranarrow Linewidth Coupling Resonance in Flexible Plasmonic Nanopillar Array for Enhanced Biomolecule Detection

“…Notably, Q ‐factor of the proposed array is higher than previously reported nanostructure sensors. [ 38,39 ]…”

“…Notably, Q-factor of the proposed array is higher than previously reported nanostructure sensors. [38,39] As shown in Figure 2, the proposed flexible plasmonic nanopillar array is experimentally fabricated by using a combination of vacuum coating and nanoimprint. First, a silicon template with circular nanohole array is fabricated by standard EBL, reactive ion etching process, and the removal of the photoresist.…”

Compact and Efficient Ring Resonator–Based Plasmonic Lens with Multiple Functionalities

“…Plasmonic wavelength demultiplexers are used to filter the selected wavelength from a bunch of wavelengths and will play a crucial role in all-optical signal processing circuits. These wavelength demultiplexers use a variety of resonators as their key component for the wavelength selection with a few exceptions without resonators [9,[26][27][28][29][30][31][32][33][34]. The resonant wavelength of these resonators can be tuned by the proper selection of the geometric parameters and the refractive index of the materials chosen.…”

“…The proposed design was extended to obtain such important functionalities as a 1 × N demultiplexer and 1 × N power splitter. As mentioned above, most of the demultiplexers available in the literature will be separating two to three wavelengths [26][27][28][29][30][31][32][33][34]. In the proposed work, an effort is made to separate eight different wavelengths (N = 8) with a channel spacing as small as 20 nm with FWHM bandwidth less than 20 nm.…”