Article
Optics
Yingying Han, Minchen Qiao, Xiao-Qing Luo, Tie-Fu Li, Wenxian Zhang, Xiu-Hao Deng, J. Q. You, Dapeng Yu
Summary: This article explores quantum interference effects in Floquet systems, revealing coherent destruction tunneling effect and multipeak transparency window splitting phenomenon in two-level and three-level systems respectively. These novel quantum interference effects provide new insights and potential applications for Floquet systems.
Article
Multidisciplinary Sciences
Changqing Wang, Xuefeng Jiang, William R. Sweeney, Chia Wei Hsu, Yiming Liu, Guangming Zhao, Bo Peng, Mengzhen Zhang, Liang Jiang, A. Douglas Stone, Lan Yang
Summary: The study reveals that a polarization mismatch between two indirectly coupled resonators can lead to polarization-induced transparency (PIT), which is distinct from EIT and exhibits a unidirectional feature, providing additional routes for manipulating light flow in optical resonator systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Applied
Huan-Qin Gao, Xiang-An Yan, Yu-Jing Han, Wan-Ting Xu, Kang Zhou
Summary: The experimental study investigates the hyperfine spectra in 5S-5P-5D transitions of Rb-87 and reveals that the amplitude of the peaks can be controlled by changing the temperature of rubidium atomic vapor cell and the probe field power. The probe field power plays a dual role in controlling the amplitude of the peaks. The results show a transition from a convoluted line-shape to EIT when the probe is weak, and a transformation from a convoluted line-shape to TPA with an enhanced probe power.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2021)
Article
Optics
Heung-Ryoul Noh, Han Seb Moon
Summary: Theoretical study on the four-wave mixing (FWM) spectra of 5S(1/2) - 5P(3/2) - 5D(5/2) ladder-type transitions of Rb-87 atoms is presented. Density matrix equations are solved considering all magnetic sublevels to calculate FWM signals in the atomic vapor cell, which are compared with experimental results. Experimental observation of FWM signal propagating opposite to the driving field and demonstration of effects of various factors on FWM spectra are highlighted.
Article
Physics, Applied
Nikunjkumar Prajapati, Narayan Bhusal, Andrew P. Rotunno, Samuel Berweger, Matthew T. Simons, Alexandra B. Artusio-Glimpse, Ying Ju Wang, Eric Bottomley, Haoquan Fan, Christopher L. Holloway
Summary: We compare the sensitivity of co-linear three-photon electromagnetically induced transparency (EIT) to radio frequency electric fields in Cs-133 Rydberg atoms against the conventional two-photon system. By modeling the atomic systems, we find that the three-photon system has narrower linewidths but does not align with the regions of best sensitivity. Additionally, we calculate the expected sensitivity for the two-photon Rydberg sensor and find that it is over an order of magnitude better than the current measured values, accounting for additional noise sources and quantum efficiency of photo-detectors.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
Ali Mehdinejad
Summary: This paper investigates the manipulation of induced torque on a four-level tripod atom system through the interaction with two vortex probe beams featuring spatial inhomogeneity, along with a non-vortex control beam. The study explores both the linear and nonlinear regimes of torque induction. The findings offer opportunities for precise control over the rotational motion of atoms within the system, with potential applications in precision measurement, quantum information processing, and quantum control.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Multidisciplinary
Amanjot Kaur, Zubair Iqbal Dar, Paramjit Kaur
Summary: In this study, a six-level inverted-Y scheme is proposed to investigate the effect of hyperfine levels on atom localization. The atom's position information can be extracted by measuring optical absorption. The presence of excited states in inverted-Y interaction significantly alters the localization profiles, and under suitable conditions, nearly 100% probability of detecting atom at a specific position in 2D and 3D subspaces can be achieved.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Applied
Ying Huang, Taiyu Okatani, Naoki Inomata, Yoshiaki Kanamori
Summary: We presented an experimental demonstration of a microelectromechanically reconfigurable ladder-shaped metamaterial operating in the terahertz range. By using ultra-small cantilever actuators, we achieved independent reshaping of each unit cell, resulting in the switching of the transmission response of terahertz waves. The microelectromechanically driven LS-MM showed a tuning contrast of 60.1% in transmittance at 0.78 THz and a 0.9-rad delay in the transmission phase shift at 1.35 THz through reconfiguration. The high mechanical resonant frequency of the cantilever actuator (585 kHz) due to its small size makes it advantageous for applications requiring fast tunable transmission modulations, such as high-resolution terahertz imaging and wireless communications.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
H. Rose, D. Popolitova, O. Tikhonova, T. Meier, P. R. Sharapova
Summary: The article mainly discusses the phenomena that arise from the interaction of matter with quantum light which cannot be explained by classical approaches, as well as the control of electronic level populations and redistribution of photon statistics under loss mechanisms.
Article
Physics, Multidisciplinary
Nguyen Van Ai, Nguyen Huy Bang, Le Van Doai
Summary: We have achieved a negative refractive index with reduced absorption in a three-level Λ-type atomic gas medium under Doppler broadening. The conditions for obtaining negative refractive index under Doppler broadening are different from those without Doppler broadening, with a higher coupling laser intensity required. The frequency band of negative refractive index is significantly expanded with Doppler broadening, but the amplitude decreases with increasing temperature or Doppler width.
Article
Physics, Multidisciplinary
Davinder Singh, Seogjoo J. Jang, Changbong Hyeon
Summary: Electromagnetically induced slow-light medium is a promising system for quantum memory devices, but controlling noise level is a major challenge. This study considers a simple model of such medium, consisting of three-level ?-systems interacting with a bosonic bath, and finds a new fundamental trade-off relation between group velocity of light and Fano factor of photon current. The Fano factor of the photon current maximizes at the minimal group velocity of light, regardless of medium parameters.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Physics, Multidisciplinary
Abdul Wahab
Summary: The proposed scheme utilizes double electromagnetically induced transparency in a four-level tripod system to achieve high precision and high spatial resolution of atom localization by constructing a spatially dependent field through superimposing three standing-wave fields in 3D-atom localization. The study demonstrates the negative impact of Doppler shift on the precision of spatial information in 3D-atom localization. The scheme opens up a new way to improve atom localization for practical applications in atom nanolithography and Bose-Einstein condensation.
Article
Physics, Applied
Neda Biranvand, Ali Bahari
Summary: To enhance optical nonlinearities in hybrid structures of quantum dots and nanoparticles, a three-level quantum dot is used. Through dipole-dipole interactions, the density matrix elements are derived under the rotating approximation. The induced fields around the quantum dot in the presence of one/two nanoparticles are obtained, and the increasing factors of the local fields are calculated. Using perturbation expansion theory, the third-order nonlinear optical susceptibility of the quantum dot is determined for different nanoparticle geometries, and the effects of structural parameters are investigated. The presence of two nanorods leads to significant optical nonlinearities, making it suitable for applications in on/off switches, quantum communication, and quantum computing.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Multidisciplinary
Ziauddin, Muqaddar Abbas, Ayesha Basharat, You-Lin Chaung, Zahida Ehsan, Hamid R. Hamedi
Summary: This research discusses the influence of photothermal effects on the transparency of an optical cavity, and proposes the introduction of a qubit to enhance the transparency effects.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Optics
Shengshuai Liu, Yanbo Lou, Jietai Jing
Summary: This study experimentally demonstrates the phase manipulation of entangled states using a phase-sensitive amplifier based on four-wave mixing, allowing for flexible generation of entanglement with different phase space squeezing orientations. The concise scheme can be expanded to generate multi-parties entangled states on demand.
