Room-Temperature Quasi-Continuous-Wave Pentacene Maser Pumped by an Invasive Ce:YAG Luminescent Concentrator

  title={Room-Temperature Quasi-Continuous-Wave Pentacene Maser Pumped by an Invasive 
 Luminescent Concentrator},
  author={Hao Wu and Xiangyu Xie and Wern Ng and Seif Mehanna and Ying Li and Max Attwood and Mark Oxborrow},
  journal={arXiv: Applied Physics},
We present in this work a quasi-continuous-wave (CW) pentacene maser operating at 1.45 GHz in the Earth's magnetic field at room temperature with a duration of $\sim$4 ms and an output power of up to -25 dBm. The maser is optically pumped by a cerium-doped YAG (Ce:YAG) luminescent concentrator (LC) whose wedge-shaped output is embedded inside a 0.1% pentacene-doped para-terphenyl (Pc:Ptp) crystal. The pumped crystal is located inside a ring of strontium titanate (STO) that supports a TE$_{01… 

Figures and Tables from this paper

Enhanced quantum sensing with room-temperature solid-state masers

Hao Wu,1, 2, ∗ Shuo Yang,1, 2, ∗ Mark Oxborrow,3 Qing Zhao,1, 2 Bo Zhang,1, 2, † and Jiangfeng Du4, 5, 6 Center for Quantum Technology Research and Key Laboratory of Advanced Optoelectronic Quantum

Perspective on room-temperature solid-state masers of multi-stage infrared photodetectors

The first solid-state masers to operate at room-temperature and ambient air-pressure were recently demonstrated using optically pumped spin-triplet states as the gain medium. In this Perspective, we

Classical benchmarking for microwave quantum illumination

Quantum illumination (QI) theoretically promises up to a 6dB error-exponent advantage in target detection over the best classical protocol. The advantage is maximised by a regime which includes a



Room-temperature solid-state maser

By exploiting the high levels of spin polarization readily generated by intersystem crossing in photo-excited pentacene and other aromatic molecules, this new type of maser seems to be capable of amplifying with a residual noise temperature far below room temperature.

Zero-field electron spin resonance and theoretical studies of light penetration into single crystal and polycrystalline material doped with molecules photoexcitable to the triplet state via intersystem crossing

A theory is presented to calculate the penetration depth of light in single crystal or polycrystalline material doped with the molecule whose electronic state can be excited by photoabsorption from

Solid-state source of intense yellow light based on a Ce:YAG luminescent concentrator.

A luminescent concentrator functioning as a bright source of yellow light is reported. It comprises a waveguide made of cerium-doped YAG crystal, in the form of a long-thin rectangular strip,

Zero-field magnetic resonance of the photo-excited triplet state of pentacene at room temperature

The pulsed EPR free induction decay (FID) signals of the photo-excited pentacene triplet state are reported for three mixed crystals at room temperature: pentacene-h14 in p-terphenyl, pentacene-h14

Unraveling the Room-Temperature Spin Dynamics of Photoexcited Pentacene in Its Lowest Triplet State at Zero Field

Photoexcited pentacene, upon arriving via intersystem crossing into its lowest triplet state, has been extensively studied due to the large and relatively long-lived spin polarization that it exhib...

Invasive optical pumping for room-temperature masers, time-resolved EPR, triplet-DNP, and quantum engines exploiting strong coupling.

It is found that, compared to conventional side-pumping, 11 times less pump beam intensity was needed to reach the masing threshold and 54 times more pulse energy could be absorbed by the gain medium without damage, resulting in a record peak output power of -5 dBm.

Enhancing brightness of Lambertian light sources with luminescent concentrators: the light extraction issue.

This work proposes a simple design for light extraction: a wedged output side facet, breaking the symmetry of the traditional rectangular slab design, which provides a simple and versatile way to simultaneously enhance the extracted power and the light directivity.

Light-emitting diode pumped luminescent concentrators: a new opportunity for low-cost solid-state lasers

High-power light-emitting diodes (LEDs) today are twice as powerful as four years ago while meantime their price has been divided by 4 making them promising sources for laser pumping. However, their