Cavity electromagnetically induced transparency and optical switching with ion Coulomb crystals

2011 ◽  
Author(s):  
Aurelien Dantan ◽  
Magnus Albert ◽  
Michael Drewsen
Keyword(s):  
Optical Switching ◽  
Electromagnetically Induced Transparency ◽  
Coulomb Crystals ◽  
Induced Transparency

Controlling the interference between localized and delocalized surface plasmons via incident polarization for optical switching

2018 ◽  
Vol 32 (16) ◽  
pp. 1850194
Author(s):  
Wen-Bo Song ◽  
Yun Qi ◽  
Xiao-Peng Zhang ◽  
Ming-Li Wan ◽  
Jinna He
Keyword(s):  
Surface Plasmons ◽  
Optical Switching ◽  
Electromagnetically Induced Transparency ◽  
Ground Plane ◽  
Photonic Devices ◽  
Biochemical Sensors ◽  
Optical Responses ◽  
Surface Enhanced Raman ◽  
Induced Transparency ◽  
Incident Polarization

Surface plasmons supported by various metallic nanostructures have given rise to several significant breakthroughs in the field of integrated photonic devices due to its ability to effectively confine and enhance optical field in subwavelength volume. In particular, the demand to actively control optical responses of plasmonic systems becomes urgent for the miniaturization of signal processing devices, surface-enhanced Raman scattering (SERS) substrates and biochemical sensors. In this paper, we systematically investigate the plasmon modes as well as their interaction in a layered nanostructure composed of a periodically-arranged radiative nanoring and a metallic ground plane, as well as a thin insulating spacer. A tunable transparent peak on the background of the broadband plasmon resonance emerges in the reflection spectrum as changing the periodicity of nanoparticle array, a plasmonic analogue of electromagnetically induced transparency (EIT). Owing to the structural symmetry of the rings, we demonstrate a new scheme of controlling the interference between localized and delocalized plasmons by means of incident polarization and believe that the proposed metasurface may find applications in optical switching if the polarization-controlled components are introduced.

scholarly journals Subluminal and superluminal light pulse propagation under external magnetic field in a vee-type three-level atomic medium

2021 ◽  
Vol 13 (1) ◽  
pp. 4
Author(s):  
Thai Doan Thanh ◽  
Nguyen Tuan Anh ◽  
Nguyen Thi Thu Hien ◽  
Hoang Minh Dong ◽  
Nguyen Xuan Hao ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Optical Switching ◽  
Optical Bistability ◽  
Light Propagation ◽  
Pulse Propagation ◽  
Electromagnetically Induced Transparency ◽  
Kerr Nonlinearity ◽  
Atomic Medium ◽  
Induced Transparency

In this work, we investigate subluminal and superluminal light propagation in a vee-type three-level atomic medium under an external magnetic field. The dispersion and absorption behaviors are studied for the cases of absence and presence of a magnetic field. It is found that under an electromagnetically induced transparency condition, the light pulse can be switched between subluminal and superluminal propagation by ON-OFF switching of the magnetic field. Finally, the transient response of the medium is discussed, which shows that the considered scheme has potential applications in magneto-optic switching devices. Full Text: PDF ReferencesBoller K J, Imamoglu A, Harris S E, "Observation of electromagnetically induced transparency", Phys. Rev. Lett. 66 (1991) 2593. CrossRef Fleischhauer M, Imamoglu A, Marangos J P, "Electromagnetically induced transparency: Optics in coherent media", Rev. Mod. Phys. 77 (2005) 633. CrossRef L.V. Hau, S. E. Harris, Z. Dutton, C.H. Bejroozi, "Light speed reduction to 17 metres per second in an ultracold atomic gas", Nature, 397 (1999) 594. CrossRef Z. Dutton, N.G.C. Slowe, L.V. Hau, "The art of taming light: ultra-slow and stopped light", Europhysics News, 35 (2004) 33. CrossRef V. Bharti, V. Natarajan, "Sub- and super-luminal light propagation using a Rydberg state", Opt. Commun. 392 (2017) 180-184. CrossRef Khoa D X, Doai L V, Son D H and Bang N H, "Enhancement of self-Kerr nonlinearity via electromagnetically induced transparency in a five-level cascade system: an analytical approach", J. Opt. Soc. Am. B. 31 (2014) 1330. CrossRef Hamedi H R, Gharamaleki A H, and Sahrai M, "Colossal Kerr nonlinearity based on electromagnetically induced transparency in a five-level double-ladder atomic system", Appl. Opt 22 (2016) 5892. CrossRef A. Fountoulakis, A.F. Terzis, E. Paspalakis, "All-optical modulation based on electromagnetically induced transparency", Phys. Lett. A 374, (2010) 3354. CrossRef Khoa D X, Doai L V, Mai Anh L. N, Trung L. C, Thuan P. V, Dung N. T, and Bang N. H, J. "Optical bistability in a five-level cascade EIT medium: an analytical approach", Opt. Soc. Am. B, 33 (2016) 735. CrossRef Hoang Minh Dong, and Nguyen Huy Bang, "Controllable optical switching in a closed-loop three-level lambda system", Phy. Scr. 94, (2019) 115510. CrossRef Dong H M, Doai L V, Sau V N, Khoa D X and Bang N H, "Propagation of a laser pulse in a three-level cascade atomic medium under conditions of electromagnetically induced transparency", Photonics Letter of Poland, 3 (2016) 73. CrossRef Khoa D X, Dong H M, Doai L V and Bang N H, "Propagation of laser pulse in a three-level cascade inhomogeneously broadened medium under electromagnetically induced transparency conditions", Optik 131 (2017) 497. CrossRef H. M. Dong, L.V. Doai, and N.H. Bang, "Pulse propagation in an atomic medium under spontaneously generated coherence, incoherent pumping, and relative laser phase", Opt. Commun. 426 (2018) 553-557. CrossRef Jiahua Li, Rong Yu, Liugang Si, and Xiaoxue Yang, "Propagation of twin light pulses under magneto-optical switching operations in a four-level inverted-Y atomic medium", J. Phys. B: At. Mol. Opt. Phys. 43 (2010) 065502. CrossRef S. H. Asadpour, H. R. Soleimani, "Polarization dependence of optical bistability in the presence of external magnetic field", Opt. Commun 310 (2014) 120-124. CrossRef H.M. Dong, L.T.Y. Nga, and N.H. Bang, "Optical switching and bistability in a degenerated two-level atomic medium under an external magnetic field", App. Opt. 58, (2019) 4192. CrossRef H. M. Dong, L. T. Y. Nga, D. X. Khoa, N. H. Bang, "Controllable ultraslow optical solitons in a degenerated two-level atomic medium under EIT assisted by a magnetic field", Sci. Rep. 10 (2020) 15298. CrossRef Daniel A. Steck, "Rubidium 87D Line Data," http://steck.us/alkalidata. CrossRef

scholarly journals Tunable Fano resonances in a robust quasicylindrical microresonator photonic system

2018 ◽  
Vol 189 ◽  
pp. 11009
Author(s):  
Xueying Jin ◽  
Mengyu Wang ◽  
Yongchao Dong ◽  
Liming Chen ◽  
Fei Li ◽  
...  
Keyword(s):  
Optical Switching ◽  
Electromagnetically Induced Transparency ◽  
High Sensitivity ◽  
Selective Excitation ◽  
Fano Resonances ◽  
All Optical ◽  
Induced Transparency ◽  
First Time ◽  
And Storage ◽  
All Optical Switching

The control of Fano resonances is of critical importance to opto-electronic and all-optical switching devices, light delay and storage, high sensitivity sensors, and quantum information processors. In this paper, we experimentally and theoretically demonstrate that controllable electromagnetically induced transparency (EIT)-like and Fano resonances can be achieved in a single quasi-cylindrical microresonator (QCMR). Robust and selective excitation of localized axial modes in a high quality QCMR is firstly demonstrated. Based on this stable platform, EIT-like lineshapes can be tuned and converted into Fano resonances by vertically moving the resonator. Moreover, by horizontally scanning the resonator, the transmission spectrum exhibits periodically changed Fano-like lineshapes. It is reported for the first time that the above two kinds of Fano resonances originated from different mechanisms can work on the same mode simultaneously. Our approach, demonstrated in this work, provides a robust photonic platform for accessing, controlling, and engineering the Fano resonances.

scholarly journals All-Optical Switching In A Medium of A Four-Level Vee-Cascade Atomic Medium

2021 ◽  
Author(s):  
Khoa Dinh Xuan ◽  
Ai Nguyen Van ◽  
Dong Hoang Minh ◽  
Doai Le Van ◽  
Bang Nguyen Huy
Keyword(s):  
Optical Switching ◽  
Electromagnetically Induced Transparency ◽  
Probe Field ◽  
Storage Devices ◽  
Signal Light ◽  
All Optical ◽  
Electromagnetically Induced Absorption ◽  
Induced Transparency ◽  
All Optical Switching ◽  
Signal Field

Abstract We proposed a model for all-optical switching in a medium consisting of four-level vee-cascade atomic systems excited by coupling, probe, and signal fields. It is shown that, by changing the intensity or the frequency of the signal field, the medium can be actively switched between either electromagnetically induced transparency (EIT) or electromagnetically induced absorption (EIA), which has behavior of all-optical switching. As a result, a cw probe field is switched into square pulses by modulating the intensity or the frequency of the signal light. Furthermore, width of the square probe pulses can be controlled by tuning the switching period of the signal field. Such a tuneable all-optical switching is useful for finding related applications in optic communications and optical storage devices.

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