scholarly journals Erratum: Cooling a mechanical resonator with nitrogen-vacancy centres using a room temperature excited state spin–strain interaction

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
E. R. MacQuarrie ◽  
M. Otten ◽  
S. K. Gray ◽  
G. D. Fuchs
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Nitrogen Vacancy ◽  
Mechanical Resonator ◽  
Strain Interaction ◽  
State Spin

scholarly journals Cooling a mechanical resonator with nitrogen-vacancy centres using a room temperature excited state spin–strain interaction

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
E. R. MacQuarrie ◽  
M. Otten ◽  
S. K. Gray ◽  
G. D. Fuchs
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Thermal State ◽  
Optical Cavity ◽  
Nitrogen Vacancy ◽  
Mechanical Resonator ◽  
Resonator Mode ◽  
Strain Interaction ◽  
State Spin ◽  
Strain Coupling

Abstract Cooling a mechanical resonator mode to a sub-thermal state has been a long-standing challenge in physics. This pursuit has recently found traction in the field of optomechanics in which a mechanical mode is coupled to an optical cavity. An alternate method is to couple the resonator to a well-controlled two-level system. Here we propose a protocol to dissipatively cool a room temperature mechanical resonator using a nitrogen-vacancy centre ensemble. The spin ensemble is coupled to the resonator through its orbitally-averaged excited state, which has a spin–strain interaction that has not been previously studied. We experimentally demonstrate that the spin–strain coupling in the excited state is 13.5±0.5 times stronger than the ground state spin–strain coupling. We then theoretically show that this interaction, combined with a high-density spin ensemble, enables the cooling of a mechanical resonator from room temperature to a fraction of its thermal phonon occupancy.

scholarly journals Excited-state spin coherence of a single nitrogen–vacancy centre in diamond

2010 ◽  
Vol 6 (9) ◽  
pp. 668-672 ◽  
Author(s):  
G. D. Fuchs ◽  
V. V. Dobrovitski ◽  
D. M. Toyli ◽  
F. J. Heremans ◽  
C. D. Weis ◽  
...  
Keyword(s):  
Excited State ◽  
Nitrogen Vacancy ◽  
Spin Coherence ◽  
State Spin

scholarly journals Point Defects in SiC as a Promising Basis for Single-Defect, Single-Photon Spectroscopy with Room Temperature Controllable Quantum States

2013 ◽  
Vol 740-742 ◽  
pp. 425-430 ◽  
Author(s):  
P.G. Baranov ◽  
Victor A. Soltamov ◽  
Alexandra A. Soltamova ◽  
Georgy V. Astakhov ◽  
Vladimir D. Dyakonov
Keyword(s):  
Point Defects ◽  
Ground State ◽  
Room Temperature ◽  
Single Photon ◽  
Nitrogen Vacancy ◽  
Zero Field ◽  
Ground State Spin ◽  
Single Defect ◽  
Nv Center ◽  
State Spin

The unique quantum properties of the nitrogen–vacancy (NV) center in diamond have motivated efforts to find defects with similar properties in silicon carbide (SiC), which can extend the functionality of such systems not available to the diamond. As an example, results of experiments on electron paramagnetic resonance (EPR) and optically detected magnetic resonance (ODMR) are presented suggests that silicon vacancy (VSi) related point defects in SiC possess properties the similar to those of the NV center in diamond, which in turn make them a promising quantum system for single-defect and single-photon spectroscopy in the infrared region. Depending on the defect type, temperature, SiC polytype, and crystalline position, two opposite schemes have been observed for the optical alignment of the high-spin ground state spin sublevels population of the VSi-related defects upon irradiation with unpolorized light. Spin ensemble of VSi-related defects are shown to be prepared in a coherent superposition of the spin states even at room temperature. Zero-field (ZF) ODMR shows the possibility to manipulate of the ground state spin population by applying radiofrequency field. These altogether make VSi-related defects in SiC very favorable candidate for spintronics, quantum information processing, and magnetometry.

scholarly journals Thermochromic aggregation-induced dual phosphorescence via temperature-dependent sp3-linked donor-acceptor electronic coupling

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tao Wang ◽  
Zhubin Hu ◽  
Xiancheng Nie ◽  
Linkun Huang ◽  
Miao Hui ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Electronic Coupling ◽  
Temperature Dependent ◽  
Molecular Systems ◽  
Donor And Acceptor ◽  
Theoretical Investigations ◽  
Donor Acceptor ◽  
And Control ◽  
Two Temperature

AbstractAggregation-induced emission (AIE) has proven to be a viable strategy to achieve highly efficient room temperature phosphorescence (RTP) in bulk by restricting molecular motions. Here, we show that by utilizing triphenylamine (TPA) as an electronic donor that connects to an acceptor via an sp3 linker, six TPA-based AIE-active RTP luminophores were obtained. Distinct dual phosphorescence bands emitting from largely localized donor and acceptor triplet emitting states could be recorded at lowered temperatures; at room temperature, only a merged RTP band is present. Theoretical investigations reveal that the two temperature-dependent phosphorescence bands both originate from local/global minima from the lowest triplet excited state (T1). The reported molecular construct serves as an intermediary case between a fully conjugated donor-acceptor system and a donor/acceptor binary mix, which may provide important clues on the design and control of high-freedom molecular systems with complex excited-state dynamics.

scholarly journals Amplification by stimulated emission of nitrogen-vacancy centres in a diamond-loaded fibre cavity

Nanophotonics ◽  
2020 ◽  
Vol 9 (15) ◽  
pp. 4505-4518
Author(s):  
Sarath Raman Nair ◽  
Lachlan J. Rogers ◽  
Xavier Vidal ◽  
Reece P. Roberts ◽  
Hiroshi Abe ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gain Medium ◽  
Stimulated Emission ◽  
Nitrogen Vacancy ◽  
Qualitative Model ◽  
Seed Laser ◽  
Laser Threshold ◽  
Cavity System ◽  
Emission Changes ◽  
532 Nm

AbstractLaser threshold magnetometry using the negatively charged nitrogen-vacancy (NV−) centre in diamond as a gain medium has been proposed as a technique to dramatically enhance the sensitivity of room-temperature magnetometry. We experimentally explore a diamond-loaded open tunable fibre-cavity system as a potential contender for the realisation of lasing with NV− centres. We observe amplification of the transmission of a cavity-resonant seed laser at 721 nm when the cavity is pumped at 532 nm and attribute this to stimulated emission. Changes in the intensity of spontaneously emitted photons accompany the amplification, and a qualitative model including stimulated emission and ionisation dynamics of the NV− centre captures the dynamics in the experiment very well. These results highlight important considerations in the realisation of an NV− laser in diamond.

scholarly journals Ultra long‐lived triplet excited state in water at room temperature: Insights on the molecular design of tridecafullerenes

2021 ◽  
Author(s):  
Javier Ramos-Soriano ◽  
Alfonso Pérez-Sánchez ◽  
Sergio Ramírez-Barroso ◽  
Beatriz M. Illescas ◽  
Khalid Azmani ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Molecular Design ◽  
Triplet Excited State

Chapter Open for the Excited-State Intramolecular Thiol Proton Transfer in the Room-Temperature Solution

2021 ◽  
Author(s):  
Chun-Hsiang Wang ◽  
Zong-Ying Liu ◽  
Chun-Hao Huang ◽  
Chao-Tsen Chen ◽  
Fan-Yi Meng ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Room Temperature ◽  
Temperature Solution

A Trimetallic Mixed Ru(II)/Fe(II) Terpyridyl Complex with A Long-Lived Excited State in Solution at Room Temperature

2004 ◽  
Vol 126 (50) ◽  
pp. 16304-16305 ◽  
Author(s):  
Sujoy Baitalik ◽  
Xian-yong Wang ◽  
Russell H. Schmehl
Keyword(s):  
Excited State ◽  
Room Temperature

scholarly journals Room-Temperature Mechanical Resonator with a Single Added or Subtracted Phonon

2021 ◽  
Vol 127 (13) ◽  
Author(s):  
Rishi N. Patel ◽  
Timothy P. McKenna ◽  
Zhaoyou Wang ◽  
Jeremy D. Witmer ◽  
Wentao Jiang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Mechanical Resonator
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