Photoluminescence properties of the entire excitonic series in 
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Takahata, Masahiro; Naka, N.

doi:10.1103/physrevb.98.195205

Cited by 45 publications

(60 citation statements)

References 51 publications

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“…3b. The 2p peak showed a markedly asymmetric lineshape consistent with previous literature on bulk Cu 2 O crystals 28,40,41 , whereas the relative emission intensities from np states differed in our case. The minor peak between the 2p and 3p energy level is attributed to 1s excitons of the green series 28 .…”

Section: Resultssupporting

confidence: 91%

“…The 2p peak showed a markedly asymmetric lineshape consistent with previous literature on bulk Cu 2 O crystals 28,40,41 , whereas the relative emission intensities from np states differed in our case. The minor peak between the 2p and 3p energy level is attributed to 1s excitons of the green series 28 . Rydberg exciton emission showed broadening for increasing excitation power, which can be explained by a combination of phonon scattering and density-dependent effects 40 ; the red shift indicates a bandgap decrease due to laser-induced sample heating.…”

Section: Resultssupporting

confidence: 91%

“…An emission feature around 1.95 eV was observed for both Cu 2 O microcrystals and the natural bulk sample, which has been reported repeatedly in literature. It was attributed to phononassisted transitions and defect emission in close spectral proximity 14,27,28 with the latter potentially being correlated with local strain in the sample 29 . The ratio of excitonic over defect emission for the measurements shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…For synthetic Cu 2 O films in the thickness range of few micrometers and below, Rydberg excitons up to n = 4 have been found 38,39 . Previous studies on natural bulk Cu 2 O crystals indicated that under above-band excitation Rydberg excitons are generated via collision processes of 1s excitons 28,40 . The question arises if Rydberg states can also be observed in the Cu 2 O microcrystals presented here, which was assessed by means of photoluminescence experiments.…”

Section: Resultsmentioning

confidence: 99%

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Rydberg excitons in Cu2O microcrystals grown on a silicon platform

et al. 2020

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Cuprous oxide (Cu 2 O) is a semiconductor with large exciton binding energy and significant technological importance in applications such as photovoltaics and solar water splitting. It is also a superior material system for quantum optics that enabled the observation of intriguing phenomena, such as Rydberg excitons as solid-state analogue to highly-excited atomic states. Previous experiments related to excitonic properties focused on natural bulk crystals due to major difficulties in growing high-quality synthetic samples. Here, the growth of Cu 2 O microcrystals with excellent optical material quality and very low point defect levels is presented. A scalable thermal oxidation process is used that is ideally suited for integration on silicon, demonstrated by on-chip waveguide-coupled Cu 2 O microcrystals. Moreover, Rydberg excitons in site-controlled Cu 2 O microstructures are shown, relevant for applications in quantum photonics. This work paves the way for the wide-spread use of Cu 2 O in optoelectronics and for the development of novel device technologies.

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Section: Resultssupporting

confidence: 91%

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Rydberg excitons in Cu2O microcrystals grown on a silicon platform

et al. 2020

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“…The two types of overlap integrals in Eqs. (22) and (23) have been evaluated by using the plane-wave expansion…”

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confidence: 99%

Interseries transitions between Rydberg excitons in Cu2O

Krüger

Scheel

2019

Phys. Rev. B

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We investigate the infrared optical transitions between excitons of the yellow, green and blue series in the cuprous oxide Cu2O. We show that, in many cases, the dipole approximation is inadequate and, in particular, that it breaks down in yellow-blue transitions even for moderate principal quantum numbers of n ≈ 10. The interband matrix elements of the transition operator needed for the evaluation of the excitonic transition strengths are derived from known as well as from fitted band parameters.

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Semiconductor Rydberg Physics

Aßmann

Bayer

2020

Adv Quantum Tech

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This topical review addresses how semiconductor systems may reveal scalable properties similar to those known from Rydberg atoms and in which ways they may be utilized for precision sensing and to realize huge long‐range interactions in semiconductor systems. Due to the interdisciplinary nature of the field, it has a twofold purpose: First, it may serve as an introduction to Rydberg physics for semiconductor physicists unfamiliar with the topic. Second, it may also serve as an overview of the specific opportunities and challenges arising in semiconductor physics for researchers who are familiar with Rydberg physics of cold atom gases, but new to the field of semiconductor physics. The review starts with an introduction on the general properties of excitons in semiconductors. Then, the material system Cu2O, which is the best developed platform for semiconductor Rydberg physics at the moment, is discussed in detail.

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Photoluminescence properties of the entire excitonic series in Cu2O

Cited by 45 publications

References 51 publications

Rydberg excitons in Cu2O microcrystals grown on a silicon platform

Rydberg excitons in Cu2O microcrystals grown on a silicon platform

Interseries transitions between Rydberg excitons in Cu2O

Semiconductor Rydberg Physics

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