Single photon emitted by a single particle in free-space vacuum modes and its resonant interaction with two- and three-level absorbers

The radiation burst from a single gamma-photon field interacting with a dense resonant absorber is studied theoretically and experimentally. This effect was discovered for the fist time by P. Helisto et al., Phys. Rev. Lett. 66, 2037Lett. 66, (1991 and it was named "gamma echo". The echo is generated by 180-degree phase shift of the incident radiation field, attained by an abrupt change of the position of the absorber with respect to the radiation source during the coherence time of the photon wave packet. Three distinguishing cases of "gamma echo" are considered, i.e., the photon is in exact resonance with the absorber, close to resonance (on the slope of the absorption line), and far from resonance (on the far wings of the resonance line). In resonance the amplitude of the radiation burst is two times larger than the amplitude of the input radiation field just before its phase shift. This burst was explained by P. Helisto et al. as a result of constructive interference of the coherently scattered field with the phase shifted input field, both having almost the same amplitude. We found that out of resonance the scattered radiation field acquires an additional component with almost the same amplitude as the amplitude of the incident radiation field. The phase of the additional field depends on the optical thickness of the absorber and resonant detuning.Far from resonance this field interferes destructively with the phase-shifted incident radiation field and radiation quenching is observed. Close to resonance three fields interfere constructively and the amplitude of the radiation burst is three times larger than the amplitude of the input radiation field.

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“…The time integrated probability of the photon without phase shift for ∆ = 0 is (see Refs. [23,27,32])…”

Section: A Resonant Casementioning

confidence: 99%

“…[27,30]. First, we express the field as a sum of resonant a r (t) and nonresonant a nr (t) components, i.e.,…”

Section: B Frequency Domain Argumentsmentioning

confidence: 99%

Radiation burst from a singleγ-photon field

2011

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“…However, the bistable operating power was rather high in the past work and it should be lowered to an acceptable level. As is well known, the saturable critical power I s ∝ 1/µ 2 τ, [20,28,29] where µ and τ are atomic dipole moment and the atomic lifetime of the saturable medium in the resonator, respectively. Thus larger µ and τ are beneficial to lower I s .…”

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confidence: 99%

High contrast all-optical diode based on direction-dependent optical bistability within asymmetric ring cavity

Xia

Zhang

et al. 2016

Chinese Phys. B

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We propose a simple all-optical diode which is comprised of an asymmetric ring cavity containing a two-level atomic ensemble. Attributed to spatial symmetry breaking of the ring cavity, direction-dependent optical bistability is obtained in a classical bistable system. Therefore, a giant optical non-reciprocity is generated, which guarantees an all-optical diode with a high contrast up to 22 dB. Furthermore, its application as an all-optical logic AND gate is also discussed.

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Slow light with a doublet structure: Underlying physical processes and basic limitations

Shakhmuratov

Odeurs

2008

Phys. Rev. A

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Slow light, produced in a medium with two widely spaced absorption resonances, is analytically studied. We show that a pulse with frequency tuned in the middle of such a doublet structure slows down due to its energy storage in the excited atomic states. If the lifetime of the atomic excitation is much longer than the pulse duration, the pulse shape is nicely reproduced at the output of a thick sample for pulses with smooth envelopes. Pulses with sharp edges are fairly reproduced at the output. Each abrupt change of the pulse amplitude is followed by transients, which are delayed together with the pulse. A possibility to slow down a single photon is also considered.͑3͒ also helps to calculate the energy of the pulse at the output of the sample of physical thickness l: U em ͑l͒ = U 0 exp͑−␣ s l͒. If the pulse is slow ͑V c͒ and the effective absorption length PHYSICAL REVIEW A 77, 033854 ͑2008͒

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Single photon emitted by a single particle in free-space vacuum modes and its resonant interaction with two- and three-level absorbers

Cited by 4 publications

References 52 publications

Radiation burst from a singleγ-photon field

Radiation burst from a singleγ-photon field

High contrast all-optical diode based on direction-dependent optical bistability within asymmetric ring cavity

Slow light with a doublet structure: Underlying physical processes and basic limitations

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