Voltage-Regulated Photoluminescence Modulation in a 0D-2D Mixed Dimensional Heterostructure
S. V. U. Vedhanth, Amit Bhunia, Mohit Kumar Singh, Yuvraj Chaudhry, Mohamed Henini + 1 more
TLDR
This paper observes voltage-regulated photoluminescence modulation and coupled oscillatory behavior in a 0D-2D heterostructure, opening new device opportunities.
Key contributions
- Observed bias-dependent oscillations in excitonic photoluminescence in 0D-2D heterostructures.
- Oscillations linked to oscillatory DC photocurrent with periodic negative differential resistance.
- Quantum oscillations persist over a large 200-micron area, indicating large-scale correlation.
- Periodic photo capacitance oscillations reflect exciton population ordering and disordering.
Why it matters
The paper reveals coupled oscillatory behavior of photoluminescence, photocurrent, and photo capacitance, suggesting a competition between coherent and incoherent tunneling processes. These findings offer new avenues for developing advanced exciton-based quantum optoelectronic devices.
Original Abstract
Bias dependent oscillations in excitonic photoluminescence are observed in a mixed dimensional 0D 2D heterostructure. These oscillations arise from modulation by oscillatory DC photocurrent, which exhibits periodic negative differential resistance, indicating recurring charge accumulation within the heterostructure. The persistence of these oscillations across a macroscopic area of diameter around 200 microns suggests the presence of periodically correlated quantum phenomena over large length scales. Furthermore, bias dependent oscillations in the photo capacitance are observed, reflecting a periodic ordering and disordering of excitonic populations. Together, these observations point to a direct competition between coherent and incoherent electron tunnelling processes. The coupled oscillatory behaviour of photoluminescence, photocurrent, and photo capacitance highlights new opportunities for exciton-based quantum optoelectronic devices.
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