Atomic coherence effects in four-level systems: Doppler-free absorption within an electromagnetically-induced-transparency window

1997 ◽  
Vol 55 (3) ◽  
pp. 2155-2158 ◽  
Author(s):  
S. N. Sandhya ◽  
K. K. Sharma
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Atomic Coherence ◽  
Coherence Effects ◽  
Induced Transparency

scholarly journals All-optical controllable electromagnetically induced transparency in coupled silica microbottle cavities

Nanophotonics ◽  
2018 ◽  
Vol 7 (10) ◽  
pp. 1669-1677 ◽  
Author(s):  
Song Zhu ◽  
Lei Shi ◽  
Shixing Yuan ◽  
Ruilong Ma ◽  
Xinliang Zhang ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Photothermal Effect ◽  
Oxide Nanoparticles ◽  
Light Storage ◽  
Control Scheme ◽  
All Optical ◽  
Induced Transparency

AbstractAn all-optical control scheme of electromagnetically induced transparency (EIT) based on two coupled silica microbottle cavities coated with iron oxide nanoparticles is proposed and experimentally demonstrated. The specially designed and fabricated silica microbottle cavity with a short and spherical end, which is coated with iron oxide nanoparticles, possesses a quality (Q) factor of 1.39×108and large all-optical tunability in a range of 282.32 GHz (2.25 nm) arising from the strong photothermal effect of the nanoparticles. Based on two coupled silica microbottle cavities, we achieve the EIT spectrum with a transparency window bandwidth of 2.3 MHz. The transparency window can be flexibly controlled by tuning the resonant frequency of the higher-Qmicrocavity. Besides, by tuning the resonant frequencies of the two microcavities separately, the whole EIT spectrum can be shifted with a range of 71.52 GHz, to the best of our knowledge, for the first time. Based on this scheme, we have realized all-optical and independent control of the transparency window and the whole EIT spectrum. We believe this work has great potential in applications such as light storage, optical sensing, and quantum optics.

scholarly journals Tunable Metamaterial with Gold and Graphene Split-Ring Resonators and Plasmonically Induced Transparency

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 7 ◽  
Author(s):  
Qichang Ma ◽  
Youwei Zhan ◽  
Weiyi Hong
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Ring Resonators ◽  
Metamaterial Structure ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Electrostatic Gating ◽  
Tunable Metamaterial ◽  
Induced Transparency ◽  
Plasmonically Induced Transparency

In this paper, we propose a metamaterial structure for realizing the electromagnetically induced transparency effect in the MIR region, which consists of a gold split-ring and a graphene split-ring. The simulated results indicate that a single tunable transparency window can be realized in the structure due to the hybridization between the two rings. The transparency window can be tuned individually by the coupling distance and/or the Fermi level of the graphene split-ring via electrostatic gating. These results could find significant applications in nanoscale light control and functional devices operating such as sensors and modulators.

Polarized Suppression and Enhancement of Six-Wave Mixing in Electromagnetically Induced Transparency Window

2012 ◽  
Vol 48 (5) ◽  
pp. 669-677 ◽  
Author(s):  
Zhiguo Wang ◽  
Huaibin Zheng ◽  
Haixia Chen ◽  
Peiying Li ◽  
Suling Sang ◽  
...  
Keyword(s):  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Wave Mixing ◽  
Induced Transparency

Power quantum control of odd-order multiwave mixing in an electromagnetically induced transparency window

2014 ◽  
Vol 31 (6) ◽  
pp. 1263 ◽  
Author(s):  
Huaibin Zheng ◽  
Ning Li ◽  
Zhaoyang Zhang ◽  
Zhenkun Wu ◽  
Chengjun Lei ◽  
...  
Keyword(s):  
Quantum Control ◽  
Electromagnetically Induced Transparency ◽  
Transparency Window ◽  
Odd Order ◽  
Induced Transparency
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