Mahoney, Joe, Tang, Mingchu, Liu, Huiyun and Abadia, Nicolas  ORCID: https://orcid.org/0000-0002-7355-4245
2022.
Measurement of the quantum-confined Stark effect in InAs/In(Ga)As quantum dots with p-doped quantum dot barriers.
Optics Express
30
(11)
, pp. 17730-17738.
10.1364/OE.455491
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Abstract
he quantum-confined Stark effect in InAs/In(Ga)As quantum dots (QDs) using non-intentionally doped and p-doped QD barriers was investigated to compare their performance for use in optical modulators. The measurements indicate that the doped QD barriers lead to a better figure of merit (FoM), defined as the ratio of the change in absorption Δα for a reverse bias voltage swing to the loss at 1 V α(1 V), FoM=Δα/α (1 V). The improved performance is due to the absence of the ground-state absorption peak and an additional component to the Stark shift. Measurements indicate that p-doping the QD barriers can lead to more than a 3x increase in FoM modulator performance between temperatures of −73 °C to 100 °C when compared with the stack with NID QD barriers.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Publisher: | Optica |
| ISSN: | 1094-4087 |
| Funders: | EPSRC |
| Date of First Compliant Deposit: | 7 June 2022 |
| Date of Acceptance: | 30 March 2022 |
| Last Modified: | 24 May 2023 00:28 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/150270 |
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