[1] G. Aubin, J. Sapriel, V.Y. Molchanov, R. Gabet, P. Grosso, S. Gosselin, Y. Jaouen, ‘Multichannel acousto-optic cells for fast optical cross connect’, Electron. Lett. Vol. 40, pp. 448–449, 2004.
[2] S. Gosselin, J. Sapriel, ‘Versatile acousto-optic vector–matrix architecture for fast optical space switches’, Optical Communication. Vol. 1, pp. 253– 254, 1998.
[3] S. Akiyama, H. Itoh, T. Takeuchi, A. Kuramata, T. Yamamoto, ‘Low-chirp 10Gbit/s InP-based Mach– Zehnder modulator driven by 1.2V single electrical signal’, Electron. Lett. Vol. 41, pp. 40–41, 2005.
[4] P.B. Chu, S.S. Lee, S. Park, ‘the path to large optical cross connects’, IEEE Communication magazine. Vol. 40, pp. 80–87, 2002.
[5] F. Nazari, Sh. Abdollahi, ‘PT-symmetric system based optical modulator’ Applied Physics B. Vol.100, pp. 124-197, 2018.
[6] F. Mehdizadeh, M. Soroosh, Hamed Alipour- Banaei, E. Farshidi, ‘All optical 2-bit analog to digital converter using photonic crystal based cavities’, Optical and Quantum Electronics, Vol. 49, 2017.
[7] O. Qasaimeh, ‘Multichannel and Multistate All- Optical Switch Using Quantum-Dot and Sample- Grating Semiconductor Optical Amplifier’, Electronics. Vol. 7, pp. 166, 2018.
[8] K. Suzuk, K. Tanizawa, S. Suda, H.Matsuura, T. Inoue, Kazuhiro Ikeda, S. Namiki, H. Kawashima,
‘Broadband silicon photonics 8 × 8 switch based on double-Mach–Zehnder element switches’ Optics Express, Vol. 25, pp. 7538-7546, 2017.
[9] Z Guo, L Lu, L Zhou, L Shen, J Chen, ‘16 × 16 Silicon Optical Switch Based on Dual-Ring-Assisted Mach–Zehnder Interferometers’ Lightwave Technology. Vol.36, pp. 225-232, 2018.
[10] D. Yang, Y. Li, F. Sun, S. Chen, J. Yu, ‘Fabrication of a 4×4 strictly non-blocking SOI switch matrix’, Opt. Communications. Vol. 250, pp. 48–53, 2005.
[11] R. Ghayour, A. NaseriTaheri, M.T. Fathi, ‘Integrated Mach–Zehnder-based 2×2all-optical switch using nonlinear two-mode interference waveguide’, Apply Optics. Vol. 47, pp. 632–638, 2008.
[12] W. Samir, C. Pask, S.J. Garth, ‘Signal switching by a control beam in a nonlinear coupler’, JOSA B. Vol. 11, pp. 2193–2205, 1994.
[13] F. Nazari, N. Bender, H. Ramezani, M.K. Moravvej-Farshi, D.N. Christodoulides, T. Kottos, ‘Optical isolation via PT-symmetric nonlinear Fano resonances’, Opt. Exp. Vol, 22, pp, 9574–9578, 2014.
[14] C. M. Bender and S. Boettcher, ‘Real spectra in non-Hermitian Hamiltonians having PT symmetry’, Phys. Rev. Lett. Vol.80, pp. 5243–5246,1998.
[15] K. Ji, Z. Wen, Z. Liu, Y. Dai, K. Han, P. Gao, A. Gao, J. Bai, G. Zhang, X. Qi, ‘Asymmetric localization induced by non-Hermitian perturbations with PT symmetry in photonic lattice’ Optics Letters. Vol. 43, pp.4457-4460, 2018.
[16] G. Gbur, K. Makri, ‘Introduction to non- Hermitian photonics in complex media: PTsymmetry and beyond’ Photonics Research, Vol. 6, PP. PTS1,2018.
[17] C. E. Ruter, K. G. Makris, R. El-Ganainy, D. N. Christodoulides, M. Segev, and D. Kip, ‘Observation of parity-time symmetry in optics’, Nature Physcs. Vol.6, pp. 192–195, 2010.
[18] L. Feng, M. Ayache, J. Huang, Y. L. Xu, M.-H. Lu, Y. F. Chen, Y. Fainman, and A. Scherer, ‘Nonreciprocal light propagation in a silicon photonic circuit’, Science. Vol. 333, pp. 729–733, 2011.
[19] T. Liu, X. Zhu, F. Chen, Sh. Liang, J. Zhu, ‘Unidirectional Wave Vector Manipulation in Two- Dimensional Space with an All Passive Acoustic Parity-Time-Symmetric Metamaterials Crystal’ Phys. Rev. Lett.Vol.120, pp. 124502, 2018.
[20] C. Shi, M. Dubois, Y. Chen, L. Cheng, H. Ramezani, Y. Wang, X. Zhang, ‘Accessing the exceptional points of parity-time symmetric acoustics’, Nature Communication. Vol.7, pp. 11110, 2016.
[21] Y. Fang, Y. Zhang, J. Xia, ‘Reversible unidirectional reflection and absorption of PTsymmetry structure under electro-optical modulation’ Optics Communications. Vol.416, pp. 25-31, 2018.
[22] N. Bender, S. Factor, J. D. Bodyfelt, H. Ramezani, D. N Christodoulides, F. M Ellis, T. Kottos, ‘Observation of asymmetric transport in structures with active nonlinearities’, Phys. Rev. Lett, Vol.110, pp. 234101, 2013.
[23] V. V. Konotop, J.e Yang, and D. A. Zezyulin,‘Nonlinear waves in PT-symmetric systems’, Rev. Mod. Phys. Vol.88, pp. 035002, 2016.
[24] L. Pilozzi, C. Conti, ‘Topological cascade laser for frequency comb generation in PT -symmetric structures’ Optics Letters. Vol.42, pp. 5174-5177, 2017.
[25] G. Veronis, Y. Huang, C. Min, ‘Non-PTsymmetric plasmonic waveguide-cavity systems: unidirectional reflection lessness and broadband near total light absorption’ Active Photonic Platforms IX. Vol. 10345, pp. 103451Z, 2017.
[26] Y. Fu, Y. Xu, ‘Asymmetric effects in waveguide systems using PT symmetry and zero index metamaterials’ Scientific Reports.Vol.7, pp. 12476, 2017.
[27] F. Nazari, M. Nazari, and M. K. Moravvej- Farshi, ‘A 2 × 2 spatial optical switch based on PT symmetry’, Opt. Lett.Vol.36, pp. 4368–4370, 2011.
[28] H. Ramezani, Y. Wang, E. Yablonovitch, X. Zhang, ‘Unidirectional Perfect Absorber’, IEEE J. Sel. Topics Quantum Electron,22, 115-120, 2016.
[29] P Li, D Mihalache, B Malomed, ‘Optical solitons in media with focusing and defocusing saturable nonlinearity and a parity-time-symmetric external potential’ Physics Optics. Vol.376, pp. 2124,2018.
[30] S Hu, X Ma, D Lu, Y Zheng, W Hu, ‘Defect solitons in parity-time-symmetric optical lattices with nonlocal nonlinearity’ Physics Review A. Vol.85, pp. 043826,2012.
[31] F. Nazari, M.K. Moravvej-Farshi, ‘Multichannel optical isolator based on nonlinear triangular parity time symmetric lattice’, IEEE J. Quant. Electron. Vol.52, PP. 6100207,2016.
[32] J Wen, X Jiang, L Jiang, M Xiao, ‘Parity-time symmetry in optical micro cavity systems’ Physics B: Atomic, Molecular and Optical Physics. Vol.51, pp. 22,2018.
[33] C. E. Ruter, K. G. Makris, R. El-Ganainy, D. N. Christodoulides, M. Segev, and D. Kip, ‘Observation of parity-time symmetry in optics’, Nat. Phys.6, 192– 195, 2010.
[34] A. Guo, G. J. Salamo, D. Duchesne, R. Morandotti, M. Volatier-Ravat, V. Aimez, G. A. Siviloglou, and D. N. Christodoulides, ‘Observation of PT-Symmetry Breaking in Complex Optical Potentials’, Phys. Rev. Lett. V. 103, PP. 093902, 2009.
[35] L. Chung, S. Lee, Y. Lin, ‘Principles and application of reduced beat length in MMI couplers’ Optics express. Vol. 14, pp 19 / 8753, 2006.
[36] T. Augustsson, ‘Bragg Grating-Assisted MMICoupler for Add-Drop Multiplexing’ Light wave Technology, Vol. 8, PP 1517, 1998.
[37] H. Benisty, A. Degiron, A. Lupu, A. D. Lustrac, S. Chénais, S. Forget, M. Besbes, G. Barbillon, A.Bruyant, S. Blaize, and G. Lérondel, ‘Implementation of PT symmetric devices using plasmonics principle and applications’, Opt Express. Vol. 19, PP. 18004-18019,2011.
[38] M. Marciniak, “Light Propagation in optical waveguides with complex refractive indices” optical Applicata, V. 4, 1996.
[39] A. Bahrami, A. Rostami, F. Nazari, ‘MZ-MMIbased all-optical switch using nonlinear coupled
waveguides’, Elsevier. Vol. 122, PP. 1787-1790, 2010.
[40] L. Lu, S. Zhao, L. Zhou, D. Li, Z. Li, M. Wang, X. Li, and J. Chen, ‘16 × 16 non-blocking silicon optical switch based on electro-optic Mach-Zehnder interferometers’, Optics Express, V. 24, pp. 9295- 9307, 2016
)