Optical Characterization of a Single Quantum Emitter Based on Vanadium Phthalocyanine Molecules

• URL: http://arxiv.org/abs/2209.09842v1
• Date: Tue, 20 Sep 2022 16:37:18 GMT
• Title: Optical Characterization of a Single Quantum Emitter Based on Vanadium Phthalocyanine Molecules
• Authors: Richard Escalante, Mohan C. Mathpal, Luis J. Mart\'inez, Lo\"ik Gence, Griselda Garcia, Iv\'an A. Gonz\'alez, Jer\'onimo R. Maze
• Abstract summary: Vanadium-oxide phthalocyanine (VOPc) molecules stand out as promising candidates due to their large coherence times measured in ensemble. We show that single VOPc molecules with stable optical properties at room temperature can be isolated.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Single quantum emitters play a fundamental role in the development of quantum technologies such as quantum repeaters, and quantum information processing. Isolating individual molecules with stable optical emission is an essential step for these applications, specially for those molecules that present large coherence times at room temperature. Among them, vanadium-oxide phthalocyanine (VOPc) molecules stand out as promising candidates due to their large coherence times measured in ensemble. However, the optical properties of individual molecules have not yet been reported. Here we show that single VOPc molecules with stable optical properties at room temperature can be isolated. We find that the optical response of the molecule under laser illumination of different polarization agrees well with a system having pyramidal C$_{4v}$ symmetry. Furthermore, the molecule reveals a non-radiative transition rate that depends on the excitation wavelength when its lifetime is interrogated. We provide theoretical calculations that support our experimental findings and provide insight to the role of phonons and internal electronic structure of the molecule. These results demonstrate that this single paramagnetic molecule can function as a single quantum emitter while displaying optical stability under ambient conditions to have their intrinsic properties investigated.

Related papers

• Time resolved quantum tomography in molecular spectroscopy by the Maximal Entropy Approach [1.7563879056963012]
  A fundamental question emerges: what role, if any, do quantum coherences between molecular electron states play in photochemical reactions? The Maximal Entropy (MaxEnt) based Quantum State Tomography (QST) approach offers unique advantages in studying molecular dynamics. We present two methodologies for constructing these operators: one leveraging Molecular Angular Distribution Moments (MADMs) which accurately capture the orientation-dependent vibronic dynamics of molecules. We achieve a groundbreaking milestone by constructing, for the first time, the entanglement entropy of the electronic subsystem: a metric that was previously inaccessible.
  arXiv  Detail & Related papers  (2024-07-23T16:43:01Z)
• Limits for coherent optical control of quantum emitters in layered materials [49.596352607801784]
  coherent control of a two-level system is among the most essential challenges in modern quantum optics. We use a mechanically isolated quantum emitter in hexagonal boron nitride to explore the individual mechanisms which affect the coherence of an optical transition under resonant drive. New insights on the underlying physical decoherence mechanisms reveals a limit in temperature until which coherent driving of the system is possible.
  arXiv  Detail & Related papers  (2023-12-18T10:37:06Z)
• Dipolar spin-exchange and entanglement between molecules in an optical tweezer array [0.0]
  Ultracold polar molecules are promising candidate qubits for quantum computing. Using a molecular optical tweezer array, single molecules can be moved and separately addressed for qubit operations. We demonstrate a two-qubit gate to generate entanglement deterministically, an essential resource for all quantum information applications.
  arXiv  Detail & Related papers  (2022-11-17T18:53:42Z)
• Bipolar single-molecule electroluminescence and electrofluorochromism [50.591267188664666]
  We investigate cationic and anionic fluorescence of individual zinc phthalocyanine (ZnPc) molecules adsorbed on ultrathin NaCl films on Ag (111) by using STML. They depend on the tip-sample bias polarity and appear at threshold voltages that are correlated with the onset energies of particular molecular orbitals.
  arXiv  Detail & Related papers  (2022-10-20T09:22:45Z)
• Sensing of magnetic field effects in radical-pair reactions using a quantum sensor [50.591267188664666]
  Magnetic field effects (MFE) in certain chemical reactions have been well established in the last five decades. We employ elaborate and realistic models of radical-pairs, considering its coupling to the local spin environment and the sensor. For two model systems, we derive signals of MFE detectable even in the weak coupling regime between radical-pair and NV quantum sensor.
  arXiv  Detail & Related papers  (2022-09-28T12:56:15Z)
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
  We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
  arXiv  Detail & Related papers  (2021-07-06T15:34:00Z)
• Visualizing spinon Fermi surfaces with time-dependent spectroscopy [62.997667081978825]
  We propose applying time-dependent photo-emission spectroscopy, an established tool in solid state systems, in cold atom quantum simulators. We show in exact diagonalization simulations of the one-dimensional $t-J$ model that the spinons start to populate previously unoccupied states in an effective band structure. The dependence of the spectral function on the time after the pump pulse reveals collective interactions among spinons.
  arXiv  Detail & Related papers  (2021-05-27T18:00:02Z)
• Rare-Earth Molecular Crystals with Ultra-narrow Optical Linewidths for Photonic Quantum Technologies [0.0]
  We report on europium molecular crystals that exhibit linewidths in the 10s of kHz range, orders of magnitude narrower than other molecular centers. Results illustrate the utility of rare-earth molecular crystals as a new platform for photonic quantum technologies.
  arXiv  Detail & Related papers  (2021-05-14T22:19:59Z)
• Single organic molecules for photonic quantum technologies [0.0]
  Isolating single molecules in the solid state has allowed fundamental experiments in basic and applied sciences. We show that quantum emitters based on single molecules hold promise to play a key role in the development of quantum science and technologies.
  arXiv  Detail & Related papers  (2020-11-10T11:53:52Z)
• Laser-induced frequency tuning of Fourier-limited single-molecule emitters [0.0]
  We observe how a focused laser beam can shift by hundreds-time their natural linewidth at the single molecule scale. Results are interpreted as effects of a photo-ionization cascade, leading to a stable electric field. System enables fabrication-free, independent tuning of multiple molecules integrated on the same photonic chip.
  arXiv  Detail & Related papers  (2020-05-25T16:14:36Z)
• Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
  Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
  arXiv  Detail & Related papers  (2020-05-03T09:27:31Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.