On-chip optical diode based on silicon photonic crystal heterojunctions

Wang, Chen; Zhou, Chunlin; Li, Zhiyuan

doi:10.1364/oe.19.026948

Cited by 167 publications

(95 citation statements)

References 27 publications

(44 reference statements)

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“…Because of reciprocity, additional transmission channels should be opened for one of the two opposite illumination directions, which can be connected with higher diffraction orders [1][2][3][4][5][6][7][8] or polarization conversion [9][10][11] and can exploit benefits of inclining interfaces. [12][13][14] In the first case, asymmetry in transmission is inspired, in fact, by asymmetric diffractions at the opposite interfaces of a grating-like structure. The most interesting regime of asymmetric transmission is probably that with vanishing transmission for one of the two opposite incidence directions, so that unidirectionality takes place.…”

Section: Introductionmentioning

confidence: 99%

Wideband unidirectional transmission with tunable sign-switchable refraction and deflection in nonsymmetric structures

et al. 2013

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A general theory of reciprocal unidirectional transmission with tunable sign-switchable refraction and deflection of outgoing wave in structures with broken spatial inversion symmetry is presented. Several coupling scenarios connected with the diffraction-inspired asymmetry in transmission are considered for volumetric structures with one-side corrugations. They illustrate conditions of coexistence of diodelike unidirectional transmission and tunability of deflection and refraction, including change of their sign. Simulation results are presented and analyzed for nonsymmetric structures based on the stacked subwavelength hole array metamaterial. It is shown that one-way coupling can appear within a wide range of frequencies and angles of incidence, a part of which may be used to obtain different signs of deflection. Transmission results and field distributions confirm the possibility of obtaining high-contrast unidirectional transmission that can be tuned by varying incidence angle, while frequency is fixed. A pronounced unidirectional transmission is demonstrated at negative deflection in structures that are only 0.47λ 0 thick, whereas a thicker structure is required in order to obtain both signs of deflection in a unidirectional regime.

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Section: Introductionmentioning

confidence: 99%

Wideband unidirectional transmission with tunable sign-switchable refraction and deflection in nonsymmetric structures

et al. 2013

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“…Another routine to create optical diode is via spatial inversion symmetry breaking [11], which could lead to the optical isolation in any device where the forward and backward transmissivity of light is very much different. In a recent work [12], we have reported a simple scheme to make unidirectional on-chip optical diodes based on the directional bandgap difference of two 2D square-lattice photonic crystals (PCs) comprising a heterojunction structure and the break of the spatial inversion symmetry. Furthermore, there exists a clear isolation effect in the designed heterojunction structure [13].…”

Section: Silicon Optical Diodesmentioning

confidence: 99%

Linear and passive silicon diodes, isolators, and logic gates

Li¹

2013

SPIE Proceedings

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Silicon photonic integrated devices and circuits have offered a promising means to revolutionalize information processing and computing technologies. One important reason is that these devices are compatible with conventional complementary metal oxide semiconductor (CMOS) processing technology that overwhelms current microelectronics industry. Yet, the dream to build optical computers has yet to come without the breakthrough of several key elements including optical diodes, isolators, and logic gates with low power, high signal contrast, and large bandwidth. Photonic crystal has a great power to mold the flow of light in micrometer/nanometer scale and is a promising platform for optical integration. In this paper we present our recent efforts of design, fabrication, and characterization of ultracompact, linear, passive on-chip optical diodes, isolators and logic gates based on silicon two-dimensional photonic crystal slabs. Both simulation and experiment results show high performance of these novel designed devices. These linear and passive silicon devices have the unique properties of small fingerprint, low power request, large bandwidth, fast response speed, easy for fabrication, and being compatible with COMS technology. Further improving their performance would open up a road towards photonic logics and optical computing and help to construct nanophotonic on-chip processor architectures for future optical computers.

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“…Some early work on reflection nonreciprocity has been taken on dielectric and antiferromagnet films [12][13][14][15][16][17] in the presence of a magnetic field. Some work on nonreciprocal transmission has been explored mostly based on magneto-optical effects or nonlinear processes in optical waveguide [18][19][20] or photonic crystals [21,22]. With the development in the research of optical nonreciprocity, optical diodes [23][24][25][26] are born at the right moment, which are also known as optical isolators [27][28][29].…”

Section: Introductionmentioning

confidence: 99%