Exciton Luminescence of Wse2 Bilayers

Багаев, В. С.; Nikolaev, S. N.; Кривобок, В. С.; Chernopitsskii, M. A.; Vasilchenko, A. A.; Копытов, Г. Ф.

doi:10.1007/s11182-019-01809-6

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…12(e) shows in situ PL spectra obtained at RT that display both the A exciton and an indirect transition, as expected in WSe 2 bilayers. 111 The band gap crossover is shown in Fig. 12(f) where a transition from bilayer to monolayer is observed for several spectra recorded at different sample positions.…”

Section: In Situ Raman Spectroscopy On Hopgmentioning

confidence: 97%

“…8(d)-(f). The surface was prepared under UHV conditions by flash annealing of a p-type silicon (111) sample. STM images with atomic resolution for both empty and filled surface states 44,82,83 are presented in Fig.…”

Section: Stm Performancementioning

confidence: 99%

“…9 summarizes some topographic, spectroscopic and optical results obtained on a clean gold surface at LT. The sample consisted of a gold (111) thin film with large atomically flat areas. 91 Before measurements, the sample was heated at 470 K under UHV conditions for removing undesired contaminants.…”

Section: A Plasmon Emission On Gold(111) Surfacementioning

confidence: 99%

“…Also, we have performed luminescence measurements in different conditions and samples. First, we show STM-LE under UHV at LT temperature on a gold (111) surface to observe the plasmonic emission from the tunneling junction. We also show in situ PL measurements on WSe 2 monolayers and spherical core-shell quantum dots as well as in situ Raman measurements on HOPG substrate under UHV conditions.…”

Section: Introductionmentioning

confidence: 99%

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Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

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Review of Scientific Instruments

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We present the design, implementation, and illustrative results of a light collection/injection strategy based on an off-axis parabolic mirror collector for a low-temperature Scanning Tunneling Microscope (STM). This device allows us to perform STM induced Light Emission (STM-LE) and Cathodoluminescence (STM-CL) experiments and in situ Photoluminescence (PL) and Raman spectroscopy as complementary techniques. Considering the Étendue conservation and using an off-axis parabolic mirror, it is possible to design a light collection and injection system that displays 72% of collection efficiency (considering the hemisphere above the sample surface) while maintaining high spectral resolution and minimizing signal loss. The performance of the STM is tested by atomically resolved images and scanning tunneling spectroscopy results on standard sample surfaces. The capabilities of our system are demonstrated by performing STM-LE on metallic surfaces and two-dimensional semiconducting samples, observing both plasmonic and excitonic emissions. In addition, we carried out in situ PL measurements on semiconducting monolayers and quantum dots and in situ Raman on graphite and hexagonal boron nitride (h-BN) samples. Additionally, STM-CL and PL were obtained on monolayer h-BN gathering luminescence spectra that are typically associated with intragap states related to carbon defects. The results show that the flexible and efficient light injection and collection device based on an off-axis parabolic mirror is a powerful tool to study several types of nanostructures with multiple spectroscopic techniques in correlation with their morphology at the atomic scale and electronic structure.

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Section: In Situ Raman Spectroscopy On Hopgmentioning

confidence: 97%

Section: Stm Performancementioning

confidence: 99%

Section: A Plasmon Emission On Gold(111) Surfacementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

Román

Auad

Grasso

et al. 2022

Review of Scientific Instruments

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Температурное Тушение Катодолюминесценции Примесно-Дефектных Центров В Алмазе В Диапазоне Температур 300–800 К

Бураченко¹,

Переседова²,

Крылов³

et al. 2022

8th International Congress on Energy Fluxes and Radiation Effects

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Исследованы спектры катодолюминесценции синтетических алмазных образцов, содержащих различный примесно-дефектный состав, в диапазоне температур от 300 до 800 К. Получены данные о температурном тушении экситонной катодолюминесценции и катодолюминесценции NV центров. Обнаружено, что скорость температурного тушения NV0 центров относительно NV– центров выше в диапазоне температур 300–800 К.

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Exciton Luminescence of Wse2 Bilayers

Cited by 2 publications

References 9 publications

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

Design and implementation of a device based on an off-axis parabolic mirror to perform luminescence experiments in a scanning tunneling microscope

Температурное Тушение Катодолюминесценции Примесно-Дефектных Центров В Алмазе В Диапазоне Температур 300–800 К

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