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Complex conductivity-dependent two-dimensional atom microscopy

Khurshaid Ali, Maghfir Ullah, Bakht Amin Bacha +1 more

The European Physical Journal PlusDec 1, 201925 citations

Subwavelength atom localization via amplitude and phase control of the absorption spectrum

Mostafa Sahrai, H. Tajalli, Kishore T. Kapale +1 more

We propose a scheme for subwavelength localization of an atom conditioned upon the absorption of a weak probe field at a particular frequency. Manipulating atom-field interaction on a certain transition by applying drive fields on nearby coupled transitions leads to interesting effects in the absorption spectrum of the weak probe field. We exploit this fact and employ a four-level system with three driving fields and a weak probe field, where one of the drive fields is a standing-wave field of a cavity. We show that the position of an atom along this standing wave is determined when probe-field absorption is measured. We find that absorption of the weak probe field at a certain frequency leads to subwavelength localization of the atom in either of the two half-wavelength regions of the cavity field by appropriate choice of the system parameters. We term this result as sub-half-wavelength localization to contrast it with the usual atom localization result of four peaks spread over one wavelength of the standing wave. We observe two localization peaks in either of the two half-wavelength regions along the cavity axis.We propose a scheme for subwavelength localization of an atom conditioned upon the absorption of a weak probe field at a particular frequency. Manipulating atom-field interaction on a certain transition by applying drive fields on nearby coupled transitions leads to interesting effects in the absorption spectrum of the weak probe field. We exploit this fact and employ a four-level system with three driving fields and a weak probe field, where one of the drive fields is a standing-wave field of a cavity. We show that the position of an atom along this standing wave is determined when probe-field absorption is measured. We find that absorption of the weak probe field at a certain frequency leads to subwavelength localization of the atom in either of the two half-wavelength regions of the cavity field by appropriate choice of the system parameters. We term this result as sub-half-wavelength localization to contrast it with the usual atom localization result of four peaks spread over one wavelength of the standing wave. We observe two localization peaks in either of the two half-wavelength regions along the cavity axis.

arXiv:quant-ph/0502158Physical Review AJul 25, 2005218 citations

Three-Dimensional Atom Localization and Microscopy in a Three-Level Λ-Type Atomic Configuration

Najm Uddin, Attaullah Khan, Afaz Uddin +2 more

This paper introduces a method for achieving precise three-dimensional atomic microscopy within a three-level Λ-type configuration, utilizing a probe field and a standing-wave control field. The microscopy information is derived from the imaginary part of the effective susceptibility, which reveals the absorption spectrum. Applications of this approach to atomic microscopy are demonstrated for scenarios involving two atoms and interactions near boundary walls. The atomic positions are precisely controlled through parameters such as detunings (∆), field strengths (β1, p), decay rates (γa, b), and field phases (ϕ1y, ϕ1z). The theoretical findings presented in this study highlight the potential for significant advancements in applications such as laser cooling and nanolithography.This paper introduces a method for achieving precise three-dimensional atomic microscopy within a three-level Λ-type configuration, utilizing a probe field and a standing-wave control field. The microscopy information is derived from the imaginary part of the effective susceptibility, which reveals the absorption spectrum. Applications of this approach to atomic microscopy are demonstrated for scenarios involving two atoms and interactions near boundary walls. The atomic positions are precisely controlled through parameters such as detunings (∆), field strengths (β1, p), decay rates (γa, b), and field phases (ϕ1y, ϕ1z). The theoretical findings presented in this study highlight the potential for significant advancements in applications such as laser cooling and nanolithography.

Journal of Mathematical Techniques in ModelingOct 15, 20240 citations

Atom microscopy using time-dependent physical spectrum

Sobia Asghar, Sajid Qamar

Optics CommunicationsJan 24, 201312 citations

Cold-Atom Scanning Probe Microscopy

Andreas Günther, Hendrik Hölscher, József Fortágh

CRC Press eBooksSep 3, 20131 citation

Absorption Spectrum Based Three-Dimensional Atomic Microscopy in Five-Level Systems with Tunable Localization

Najm Uddin, Attaullah Khan, Sohana Bahadar +3 more

Abstract In this study we explore the microscopy of atoms in three dimensions using a new technique of absorption spectrum in an atomic system with five levels of one and two atoms microscopy, Wall-like microscopy & ellipsoidal like microscopy observed. The position and probability of localized atoms are controlled and modified by tunings, the phases, strength, and direction of the applied driving fields. The current work may have potential applications in laser cooling, microscopy, and atom nano-lithography.Abstract In this study we explore the microscopy of atoms in three dimensions using a new technique of absorption spectrum in an atomic system with five levels of one and two atoms microscopy, Wall-like microscopy & ellipsoidal like microscopy observed. The position and probability of localized atoms are controlled and modified by tunings, the phases, strength, and direction of the applied driving fields. The current work may have potential applications in laser cooling, microscopy, and atom nano-lithography.

Oct 15, 20250 citations

Manipulation of two dimensional atom microscopy by weak probe absorption spectrum

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