Emerging Trends, Challenges, and Applications in Solid‐State Laser Cooling

Thomas, Jyothis; Maia, Lauro J. Q.; Ledemi, Yannick; Messaddeq, Younès; Kashyap, Raman

doi:10.1002/9781119529538.ch10

Cited by 7 publications

(6 citation statements)

References 136 publications

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“…Optical refrigeration of material uses an incident light source to induce anti-Stokes fluorescence. , The photoluminescence must emit photons with higher energy than the incident photons (energy up-conversion) to generate a cooling of the material. During the last two decades, the optical refrigeration of semiconductors has been studied, experimentally and theoretically, in different devices. , In particular, it has been investigated in transition metal dichalcogenides (TMD). These materials offer remarkable properties in many optoelectronic applications, thanks, among other things, to their strong light absorption. , The crystal structure of a bulk TMD is a stack of two-dimensional (2D) monolayers.…”

Section: Introductionmentioning

confidence: 99%

“…During the last two decades, the optical refrigeration of semiconductors has been studied, experimentally and theoretically, in different devices. 4,5 In particular, it has been investigated in transition metal dichalcogenides (TMD). These materials offer remarkable properties in many optoelectronic applications, thanks, among other things, to their strong light absorption.…”

Section: ■ Introductionmentioning

confidence: 99%

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Solar Refrigeration Based on Impact Ionization in a Transition Metal Dichalcogenides Superlattice

Dalla Valle,

Bescond,

Michelini

et al. 2024

J. Phys. Chem. C

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Optical refrigeration of a semiconductor generally requires a laser excitation very close to its bandgap and a radiative efficiency close to 1. Under these two conditions, the material can be refrigerated by radiating more energy than it absorbs. In this theoretical work, we propose considering impact ionization, which appears to be predominant in transition metal dichalcogenides and evaporative cooling to overcome both requirements. With impact ionization, high-energy photons excite multiple low-energy electron−hole pairs rather than heating the material by emitting phonons when the highenergy carriers thermalize. Thanks to an evaporative cooling effect, such low-energy electron−hole pairs diffuse from a small bandgap absorber into a larger bandgap reservoir by absorbing phonons. This cooling process operates even in materials with a modest radiative efficiency. We propose a device based on a small bandgap absorber (a strain-balanced superlattice based on two-dimensional transition metal dichalcogenides) and a larger bandgap reservoir made of bulk MoS 2 , forming a type I heterojunction. With a detailed balance approach, parametrized with ab initio calculations, we demonstrate a net cooling of the absorber under solar irradiation above 25%, even considering low external radiative efficiency.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Solar Refrigeration Based on Impact Ionization in a Transition Metal Dichalcogenides Superlattice

Dalla Valle,

Bescond,

Michelini

et al. 2024

J. Phys. Chem. C

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“…Epstein et al reported in 1995 the first experimental evidence of laser-induced refrigeration in a Yb 3+ -doped glass [2]. Since then, many advances in the field of rare-earth-doped solids have been reported and reviewed [3,4]. Besides, a high interest has grown for optical refrigeration of semiconductors to enhance the performance of many optoelectronic devices [5].…”

Section: Introductionmentioning

confidence: 99%

Laser Cooling in Semiconductor Heterojunctions by Extraction of Photogenerated Carriers

Dalla Valle,

Bescond,

Michelini

et al. 2023

Phys. Rev. Applied

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η rad φ in (E) Laser cooling of a semiconductor material, in which heat is extracted by emitting photons, requires a near-perfect external radiative efficiency. In this theoretical work, we propose a cooling system based on carrier extraction in a large gap reservoir. The electron-hole pairs generated in the material to be cooled are extracted in such a reservoir by absorbing phonons, then carrying a heat flux. With an analytical detailed balance model, we show that this concept is applicable even in materials with moderate external radiative efficiency. Moreover, by adjusting the gap of the reservoir to the laser power, this system can either reach high efficiency or transfer high power with lower efficiency.

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“…Al 2 O 3 and P 2 O 5 have both been successful individually 12,13 , as well as when they are combined in specific ratios, forming AlPO 4 entities 14,15 . This has resulted in an increase in the silica concentration quenching limit from 10 25 ions/m 3 to 10 [26][27] ions/m 3 16,17 . Although this increases the concentration of rare earths, the high phonon energy environment of the oxide glass also limits the concentration at which quenching occurs 18,19 .…”

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confidence: 99%

“…To counter these limitations, our previous work concentrated on artificially creating a low phonon environment for the rare earth in high phonon energy oxide glasses, by the use of fluoride nanocrystals [20][21][22][23][24][25][26][27][28] . While this technique showed enhanced quantum efficiency of emission and increased lifetimes, the fabrication route was limited by the purity of starting materials and the process by which the glasses were made 29 , requiring a radical change in the glass making process.…”

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confidence: 99%

Demonstration of laser cooling in a novel all oxide GAYY silica glass

Thomas

Meyneng

Tehranchi

et al. 2023

Sci Rep

Self Cite

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We demonstrate laser induced cooling in ytterbium doped silica (SiO2) glass with alumina, yttria co-doping (GAYY-Aluminum: Yttrium: Ytterbium Glass) fabricated using the modified chemical vapour deposition (MCVD) technique. A maximum temperature reduction by − 0.9 K from room temperature (296 K) at atmospheric pressure was achieved using only 6.5 W of 1029 nm laser radiation. The developed fabrication process allows us to incorporate ytterbium at concentration of 4 × 1026 ions/m3 which is the highest value reported for laser cooling without clustering or lifetime shortening, as well as to reach a very low background absorptive loss of 10 dB/km. The numerical simulation of temperature change versus pump power well agrees with the observation and predicts, for the same conditions, a temperature reduction of 4 K from room temperature in a vacuum. This novel silica glass has a high potential for a vast number of applications in laser cooling such as radiation-balanced amplifiers and high-power lasers including fiber lasers.

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Emerging Trends, Challenges, and Applications in Solid‐State Laser Cooling

Cited by 7 publications

References 136 publications

Solar Refrigeration Based on Impact Ionization in a Transition Metal Dichalcogenides Superlattice

Solar Refrigeration Based on Impact Ionization in a Transition Metal Dichalcogenides Superlattice

Laser Cooling in Semiconductor Heterojunctions by Extraction of Photogenerated Carriers

Demonstration of laser cooling in a novel all oxide GAYY silica glass

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