Role of volume and surface spontaneous parametric down-conversion in the generation of photon pairs in layered media

JavÅ̄rek, D.; Peřina, Jan

doi:10.1103/physreva.95.043828

Cited by 1 publication

(1 citation statement)

References 43 publications

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“…So, it suggests that the NwN morphology has something interesting to do with facilitating the non-linear interaction with UV component and the spatial segregation of the emission making the walls richer in UV emission and the nanocavities richer in NIR emission. A rigorous theoretical analysis of Spontaneous Parameteric Downconversion (SPDC) in simpler 1D GaN/AlN layered media can be found elsewhere 11 . Here, we focus on simpler modelling in two parts for examining the role of morphology.…”

Section: Resultsmentioning

confidence: 99%

Observation of monochromatic and coherent luminescence from nanocavities of GaN nanowall network

Shamoon

Upadhyaya

Shivaprasad

2021

Sci Rep

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Scaling-down the size of semiconductor cavity lasers and engineering their electromagnetic environment in the Purcell regime can bring about spectacular advance in nanodevices fabrication. We report here an unprecedented observation of a coherent Cathodoluminescence from GaN nanocavities (20–100 nm). Incident lower energy (< 15 kV) electron beams excite the band edge UV emission from the walls of the network whereas for higher energies, the emitted photons are spontaneously down converted into NIR and preferentially emerge from the nanocavities. Non-centrosymmetric structure of GaN and its nanowall geometry together facilitate this unique observation which is substantiated by our numerical results. At cryogenic temperatures, an intense and narrow laser-like NIR beam emanates out of the nanocavities. The work promises the possibility of fabrication of very high density (over 108/cm2) cavity lasers that are addressable by simple deflection and tuning of incident electron beams.

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Section: Resultsmentioning

confidence: 99%