Towards spontaneous parametric down conversion from monolayer MoS2

Hatef Dinparasti Saleh, Stefano Vezzoli, Lucia Caspani, Arthur Branny, Santosh Kumar, Brian D. Gerardot, Daniele Faccio

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a detailed study of the second order nonlinearity of 2D (mono-atomic layer) dichalcogenide MoS2, both in the visible and in the IR regime, and test its potential for spontaneous parametric down-conversion (SPDC), the amplification of vacuum fluctuations mediated by optical nonlinearity. We develop a model of SPDC from a deeply subwavelength nonlinear medium, where phase matching conditions are completely relaxed, and make predictions about the rate of emitted photons, their momentum, polarisation and spectrum. We show that detection in the visible spectral region is hindered by the strong photoluminescence background. Moving to the IR regime we observe indications of SPDC by performing polarization, power dependence and lifetime measurements around 1560 nm. We show that the signal from a single monolayer is qualitatively different from that generated by multi-layer MoS2. Finally, we characterize the latter as a new kind of photo-luminescence emission which is enhanced at the edges of multi-layer MoS2.
LanguageEnglish
Article number3862
Number of pages7
JournalScientific Reports
Volume8
DOIs
Publication statusPublished - 1 Mar 2018

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nonlinearity
photoluminescence
polarization
phase matching
indication
momentum
life (durability)
vacuum
photons
predictions

Keywords

  • nonlinear optics
  • quantum optics
  • sub-wavelength optics

Cite this

Dinparasti Saleh, H., Vezzoli, S., Caspani, L., Branny, A., Kumar, S., Gerardot, B. D., & Faccio, D. (2018). Towards spontaneous parametric down conversion from monolayer MoS2. Scientific Reports, 8, [3862]. https://doi.org/10.1038/s41598-018-22270-4
Dinparasti Saleh, Hatef ; Vezzoli, Stefano ; Caspani, Lucia ; Branny, Arthur ; Kumar, Santosh ; Gerardot, Brian D. ; Faccio, Daniele. / Towards spontaneous parametric down conversion from monolayer MoS2. In: Scientific Reports. 2018 ; Vol. 8.
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Dinparasti Saleh, H, Vezzoli, S, Caspani, L, Branny, A, Kumar, S, Gerardot, BD & Faccio, D 2018, 'Towards spontaneous parametric down conversion from monolayer MoS2' Scientific Reports, vol. 8, 3862. https://doi.org/10.1038/s41598-018-22270-4

Towards spontaneous parametric down conversion from monolayer MoS2. / Dinparasti Saleh, Hatef; Vezzoli, Stefano; Caspani, Lucia; Branny, Arthur; Kumar, Santosh; Gerardot, Brian D.; Faccio, Daniele.

In: Scientific Reports, Vol. 8, 3862, 01.03.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Towards spontaneous parametric down conversion from monolayer MoS2

AU - Dinparasti Saleh, Hatef

AU - Vezzoli, Stefano

AU - Caspani, Lucia

AU - Branny, Arthur

AU - Kumar, Santosh

AU - Gerardot, Brian D.

AU - Faccio, Daniele

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AB - We present a detailed study of the second order nonlinearity of 2D (mono-atomic layer) dichalcogenide MoS2, both in the visible and in the IR regime, and test its potential for spontaneous parametric down-conversion (SPDC), the amplification of vacuum fluctuations mediated by optical nonlinearity. We develop a model of SPDC from a deeply subwavelength nonlinear medium, where phase matching conditions are completely relaxed, and make predictions about the rate of emitted photons, their momentum, polarisation and spectrum. We show that detection in the visible spectral region is hindered by the strong photoluminescence background. Moving to the IR regime we observe indications of SPDC by performing polarization, power dependence and lifetime measurements around 1560 nm. We show that the signal from a single monolayer is qualitatively different from that generated by multi-layer MoS2. Finally, we characterize the latter as a new kind of photo-luminescence emission which is enhanced at the edges of multi-layer MoS2.

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Dinparasti Saleh H, Vezzoli S, Caspani L, Branny A, Kumar S, Gerardot BD et al. Towards spontaneous parametric down conversion from monolayer MoS2. Scientific Reports. 2018 Mar 1;8. 3862. https://doi.org/10.1038/s41598-018-22270-4