Prospects for precision physical experiments in optics

Baklanov, E. V.; Chebotaev, V. P.

doi:10.1070/pu1977v020n07abeh005447

Cited by 15 publications

(34 citation statements)

References 2 publications

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“…In the frequency domain, it will introduce Rabi side bands in the absorption, and strikingly, the amplification of a probe beam. This phenomenon has been studied theoretically [16,17,18] and demonstrated experimentally in atomic systems [19,20]. Recently, these effects have also been observed in quantum dot and molecular systems [10,11,21,22].…”

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Single Charged Quantum Dot in a Strong Optical Field: Absorption, Gain, and the ac-Stark Effect

Sun

Kim

et al. 2008

Phys. Rev. Lett.

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We investigate a singly-charged quantum dot under a strong optical driving field by probing the system with a weak optical field. When the driving field is detuned from the trion transition, the probe absorption spectrum is shifted from the trion resonance as a consequence of the dynamic Stark effect. Simultaneously, a gain sideband is created, resulting from the coherent energy transfer between the optical fields through the quantum dot nonlinearity. As the pump detuning is moved from red to blue, we map out the anticrossing of these two spectral lines. The optical Bloch equations for a stationary two-level atom can be used to describe the numerous spectral features seen in this nano solid state system. PACS numbers: 78.67.Hc,42.50.Hz,42.50.Gy Quantum dot (QD) nano-structures have been proposed for numerous quantum mechanical applications due to their customizable atom-like features [1]. One important application involves using these QDs as the building blocks for quantum logic devices [2]. An electron spin trapped inside a QD is a good candidate for a quantum bit (qubit) since it is known to have long relaxation [3] and decoherence times [4,5]. Recently, the electron spin coherence has been optically generated and controlled [5,6,7] in ensembles of QDs. The initialization of the electron spin state in a single QD has also been realized by optical cooling techniques [8,9].One important task is to understand and control the physical properties of a singly-charged QD in the strong optical field regime, i.e. the light-matter interaction strength is much larger than the transition linewidth, under both resonant and nonresonant excitation. Given the recent work on optically driven neutral quantum dots in strong fields [10,11] demonstrating many features similar to atomic systems, it is clear that a negatively charged quantum dot has similarities to a negative ion. However, the excited state of a dot is a many body structure comprised of two electrons and a hole. Interestingly, the results in this paper show that strong field excitation tuned near resonance in a negatively charged dot leads to changes in the absorption spectrum that are in excellent agreement with theory.In the time domain, the strong field interaction leads to the well-known Rabi oscillations [12,13,14,15]. In the frequency domain, it will introduce Rabi side bands in the absorption, and strikingly, the amplification of a probe beam. This phenomenon has been studied theoretically [16,17,18] and demonstrated experimentally in atomic systems [19,20]. Recently, these effects have also been observed in quantum dot and molecular systems [10,11,21,22]. The optical AC Stark effect has been seen by exciting a neutral QD with a detuned strong op- , respectively. However, the study of the singly-charged QDs in the strong field regime has been very limited at the single dot level [24]. In this letter, we investigate a singly-charged QD under a strong optical driving field with both on and off-resonant pumping. When the strong pump is on resonance with the t...

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“…It is known that in a two-level system driven by a strong optical field, the absorption of the weak probe beam is significantly modified [16,17,18]. By solving the optical Bloch equations to all orders in the pump field and first order in the probe field, we obtain the absorption coefficient of the probe beam as [17] …”

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confidence: 99%

Single Charged Quantum Dot in a Strong Optical Field: Absorption, Gain, and the ac-Stark Effect

Sun

Kim

et al. 2008

Phys. Rev. Lett.

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“…The additional broadening of a narrow saturation resonance that occurs in a two-level atomic system when it interacts with two weak-and strong-opposing light fields is ascribed to the effect of optical coherence between the two levels, as is already described in previously published papers. 36,37 With the increase in field intensity, coherence increases, and the range of nonzero velocities of resonant atoms increases, which yields the additional broadening.…”

Section: A Power-dependent Change Of the Signal Shapementioning

confidence: 99%

Doppler-free modulation transfer spectroscopy of rubidium 52S1/2–62P1/2 transitions using a frequency-doubled diode laser blue-light source

Ito¹

2000

Review of Scientific Instruments

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Articles you may be interested inDevelopment of a wavelength-stabilized distributed Bragg reflector laser diode to the Cs-D 2 line for field use in accurate geophysical measurements Rev. Sci. Instrum. 78, 026105 (2007); A compact laser head with high-frequency stability for Rb atomic clocks and optical instrumentation Rev. Sci. Instrum. 76, 073108 (2005); 10.1063/1.1979493 Intensity-modulated blue light generated by frequency doubling of wavelength-modulated high-power diode-laser radiation Appl. Phys. Lett. 86, 151101 (2005); 10.1063/1.1899234 A combined absorption-wavelength modulation technique for diode laser spectroscopy of van der Waals complexes in a pulsed planar jet Rev.

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“…A complete description is obtained by including the interaction with the probe field in the equations of motion for the density matrix elements. [34][35][36] In Refs. 32 and 33 the problem is solved using a highintensity laser theory.…”

Section: B Possible Complicationsmentioning

confidence: 99%

Photophysical and photochemical molecular hole burning theory

Vries¹,

Wiersma

1980

The Journal of Chemical Physics

134

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In this paper theories are given, describing photo physical and photochemical hole burning experiments on molecular mixed crystals at low temperature. Population saturation hole burning is treated for a twolevel system where the lower level is the ground state. Hole burning due to a triplet state acting as a population bottle neck is also described by a steady-state density matrix theory. Connection is made with optical free induction decay. To obtain T, (the decay time of the off-diagonal elements of the density matrix). which is the main goal of these hole burning experiments. a linear extrapolation method is discussed. For photochemical hole buming a time-dependent density matrix treatment is given. Using this theory numerical simulations were performed of the experimental results obtained by Volker and coworkers for porphin in n -octane at low temperature. Good agreement with experiment is obtained. For this case extrapolation methods are discussed in order to obtain reliable T, values. A time-dependent kinetic theory is used to simulate the photochemical hole burning experiments on dimethyl-s-tetrazine in durene and s -tetrazine in benzene. This theory accounts for the recently revealed two-photon character of these photodissociations. It is shown that despite this complication the hole full width at halfmaximum may still equal twice the homogeneous width of the So -S, transition.

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Prospects for precision physical experiments in optics

Cited by 15 publications

References 2 publications

Single Charged Quantum Dot in a Strong Optical Field: Absorption, Gain, and the ac-Stark Effect

Single Charged Quantum Dot in a Strong Optical Field: Absorption, Gain, and the ac-Stark Effect

Doppler-free modulation transfer spectroscopy of rubidium 52S1/2–62P1/2 transitions using a frequency-doubled diode laser blue-light source

Photophysical and photochemical molecular hole burning theory

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