A Compact Polarization Beam Splitter Based on a Multimode Photonic Crystal Waveguide With an Internal Photonic Crystal Section

Abstract

Abstract-We present the design and simulation of an ultra-compact polarization beam splitter (PBS) by combining a photonic crystal (PhC) multimode waveguide and an internal PhC section. The PhC multimode waveguide is designed to collect the powers reflected by or transmitted through the internal PhC structure which serves as a polarization sensitive scatterer. Plane wave expansion (PWE) method is used to calculate the band structure and the finite-difference timedomain (FDTD) method is employed to obtain the spectrum response. The simulation results show that the present design can give an ultracompact PBS with high extinction ratio over a broad bandwidth.

Giant Circular Dichroism and Negative Refractive Index of Chiral Metamaterial Based on Split-Ring Resonators

“…MMs have become an excellent platform for some unique applications, such as superlens, cloaking, electric devices, and so on [2][3][4][5]. Recently, more and more interest has been focused on the chiral metamaterial (CMM) structures due to their attractive EM (optical) properties such as strong optical activity, circular dichroism (CD) and negative refractive index (NRI) from microwave to optical range [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22].…”

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“…Wavelength-scale photonic crystals (PhC) have emerged as key elements for many applications ranging from cavity quantum electrodynamics [1,2], low threshold lasers [3,4], nonlinear optics [5][6][7], high performance filters [8][9][10][11], beam-splitters [12][13][14] and optical switches [15,16]. In the past decade, there has been a considerable research effort to develop photonic crystal microcavities characterized by high Q-factor and small mode volume comparable to (λ/n) 3 .…”

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