Optical switching phenomenon in ladder type atomic system under varying wavelength mismatching effect with one due to a Rydberg transition

Mondal, Suman; Ghosh, Arindam; Islam, Khairul; Bandyopadhyay, Amitava

doi:10.1016/j.optcom.2018.11.071

Cited by 7 publications

(9 citation statements)

References 31 publications

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“…In this work the values of γ 43 are 0.68 MHz, 0.72 MHz and 3.1 MHz [40] for Tr-I, Tr-II and Tr-III respectively, if not specified otherwise. The marked difference in the value of γ 43 for 87 Rb and 133 Cs affects the shape and width of the transparency windows for the two specimens [41]. The probe Rabi frequency is 0.01 MHz for all the simulations if not otherwise stated.…”

Section: Absorption Spectramentioning

confidence: 99%

An optical narrowband switch between subluminal and superluminal light propagation in the inverted-Y configuration

Mondal¹,

Ghosh²,

Islam³

et al. 2019

Laser Phys.

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The propagation of a weak probe field through a four-level inverted-Y type atomic system driven by two additional coherent fields, namely the control field and the repump field, is studied. The simulated probe absorption shows that electromagnetically induced transparency and the line shape of the transparency window under a Doppler-broadened condition are dependent on the residual Doppler averaging due to the wavelength mismatch between the control and probe fields. For 87 Rb the probe propagation changes from subluminal on-resonance under a Doppler-free condition to superluminal on-resonance under a Dopplerbroadened condition. For both 87 Rb and 133 Cs, the narrow subluminal window occurring in the group index profile in a Doppler-free environment offers an excellent delay bandwidth for probe field propagation. Under this condition, the order of the delay in probe field propagation can be as long as a few hundred µs and seems quite promising in the field of optical delay generation and light storage. The analysis shows that the residual Doppler averaging has a greater impact on the switching window under the variation of the Rabi frequency of the control field as compared to that of the repump field.

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Section: Absorption Spectramentioning

confidence: 99%

An optical narrowband switch between subluminal and superluminal light propagation in the inverted-Y configuration

Mondal¹,

Ghosh²,

Islam³

et al. 2019

Laser Phys.

Self Cite

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“…The optical Bloch equations (OBEs) of the four-level Y-type system are derived from the Liouville equation or the Master equation [19] after adding the phenomenological decay terms. These are given as…”

Section: Theoretical Modelmentioning

confidence: 99%

“…( 17) for a Doppler free environment. Under the Doppler broadened condition, equation (19) has to be used instead of Eq. ( 17) to investigate the probe response.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…[34], whereas the spontaneous decay rates from levels |3 and |4 (γ 32 and γ 42 respectively) to level |2 are taken from Ref. [19]. Figure 2 shows the simulated probe absorption vs. probe detuning at ∆ c = 50 MHz and ∆ r = −50 MHz.…”

Section: Doppler Free Conditionmentioning

confidence: 99%

“…EIT makes an otherwise absorptive medium transparent to a resonant or near resonant coherent probe field propagating in the presence of a strong control field. Due to steep variation in the group index around an EIT window and subsequent reduction in the group velocity of the probe pulse, [19] EIT has found immense application in optical delay generation, [16,17] stopping and storage of light, [20] etc. All these are expected to form the backbone of future optoelectronic devices, optical communication, all optical logic gates, and quantum computation.…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetically induced transparency and electromagnetically induced absorption in Y-type system

et al. 2020

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The propagation of a probe field through a four-level Y-type atomic system is described in the presence of two additional coherent radiation fields, namely, the control field and the coupling field. An expression for the probe response is derived analytically from the optical Bloch equations under steady state condition to study the absorptive properties of the system under probe field propagation through an ensemble of stationary atoms as well as in a Doppler broadened atomic vapor medium. The most striking result is the conversion of electromagnetically induced transparency (EIT) into electromagnetically induced absorption (EIA) as we start switching from weak probe regime to strong probe regime. The dependence of this conversion on residual Doppler averaging due to wavelength mismatch is also shown by choosing the coupling transition as a Rydberg transition.

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Microwave assisted gain in inverted-Y type atomic system

Mondal

Mal

Bhattacharyya³

et al. 2021

Optik

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Optical switching phenomenon in ladder type atomic system under varying wavelength mismatching effect with one due to a Rydberg transition

Cited by 7 publications

References 31 publications

An optical narrowband switch between subluminal and superluminal light propagation in the inverted-Y configuration

An optical narrowband switch between subluminal and superluminal light propagation in the inverted-Y configuration

Electromagnetically induced transparency and electromagnetically induced absorption in Y-type system

Microwave assisted gain in inverted-Y type atomic system

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