Dynamics of an optomechanical resonator containing a quantum well induced by periodic modulation of cavity field and external laser beam

We study in detail the dynamics of a nonstationary system composed of a quantum well confined in an optomechanical cavity. The cavity frequency is rapidly modulated in time. The resultant periodically modulated spectra are presented. In particular, we study the effect of a two-photon process on the number of intracavity photons. The intensity of fluorescent light emitted by excitons in the quantum well is also examined for this nonstationary system. It is observed that the initial stage of fluorescence spectrum helps in detecting the two-photon process. It is also noticed that under strong modulation, the two-photon process dominates, while under weak modulation, fluorescence dominates. We also analyzed the dynamics of the system induced by a periodic modulation of the external pump laser with constant cavity frequency. This modulation of external laser pump helps in phonon amplification.

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Evolution of Atomic Entanglement for Different Cavity-Field Statistics in Single-Mode Two-Photon Process

Journal of Experimental and Theoretical Physics ◽

10.1134/s1063776118090194 ◽

2018 ◽

Vol 127 (3) ◽

pp. 391-397 ◽

Cited By ~ 1

Author(s):

Sudha Singh ◽

Karuna Gilhare

Keyword(s):

Single Mode ◽

Cavity Field ◽

Two Photon ◽

Photon Process ◽

Atomic Entanglement

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Nonlinear optical absorption via two-photon process in GaAs/Ga1−xAlxAs quantum well

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2015.03.004 ◽

2015 ◽

Vol 82 ◽

pp. 36-41 ◽

Cited By ~ 20

Author(s):

Huynh Vinh Phuc

Keyword(s):

Optical Absorption ◽

Quantum Well ◽

Nonlinear Optical ◽

Two Photon ◽

Nonlinear Optical Absorption ◽

Photon Process

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Nonlinear phonon-assisted cyclotron resonance via two-photon process in parabolic quantum well

Superlattices and Microstructures ◽

10.1016/j.spmi.2015.03.054 ◽

2015 ◽

Vol 83 ◽

pp. 755-765 ◽

Cited By ~ 9

Author(s):

Tran Cong Phong ◽

Huynh Vinh Phuc

Keyword(s):

Quantum Well ◽

Cyclotron Resonance ◽

Two Photon ◽

Photon Process

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Dynamics of Periodically Modulated Cavity Frequency of A Microwave Cavity Consisting of Cold Atoms

Journal of Atomic Molecular Condensate and Nano Physics ◽

10.26713/jamcnp.v1i1.224 ◽

2014 ◽

Vol 1 (1) ◽

pp. 11-18

Author(s):

Sonam Mahajan ◽

Neha Aggarwal ◽

Aranya B. Bhattacherjee ◽

Man Mohan

Keyword(s):

Cold Atoms ◽

Microwave Cavity ◽

Adiabatic Process ◽

Periodic Modulation ◽

Atomic Fluorescence ◽

Two Photon ◽

Quantum Device ◽

Atomic Fountain ◽

Photon Process

We investigate the possibility to enhance the atomic fluorescence and using it to measure the ‘second’ by means of a quantum device formed by two-level cold atoms confined in a microwave cavity with harmonically modulated cavity frequency. Besides the harmonically modulated cavity frequency, we have also studied the modification in the atomic fluorescence due to the addition of the squeezing term in the Hamiltonian of the system. The periodic modulation of cavity frequency give rise to non adiabatic process characterized as two-photon process. It has been observed that the two-photon process can be used as a new handle to enhance the atomic fluorescence which helps in improving the accuracy of the atomic fountain clocks.

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Two-photon excitation microscopy in cellular biophysics

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100136684 ◽

1995 ◽

Vol 53 ◽

pp. 62-63

Author(s):

David W. Piston ◽

Brian D. Bennett ◽

Robert G. Summers

Keyword(s):

Confocal Microscopy ◽

Laser Beam ◽

Duty Cycle ◽

Excited Electronic State ◽

Input Power ◽

Two Photon ◽

Simultaneous Absorption ◽

Photon Excitation ◽

Very High ◽

Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

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