Stark shift of the spectral response in quantum dots-in-a-well infrared photodetectors

Aivaliotis, Pantelis; Vukmirović, Nenad; Zibik, E. A.; Cockburn, J. W.; Indjin, D.; Harrison, P.; Groves, Chris; David, J.P.R.; Hopkinson, M.; Wilson, L. R.

doi:10.1088/0022-3727/40/18/004

Cited by 22 publications

(11 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, a new emerging technology for adaptable and compressive sensing is the quantum dots-in-a-well (DWELL)-based IR focal plane array (FPA) [3]- [5]. Owing to the quantum-confined Stark effect (QCSE) [6], [7], the DWELL sensor exhibits a unique feature that enables continuous spectral tuning in the mid-wave infrared (MWIR) and long-wave infrared (LWIR) spectral regions by means of changing the applied bias voltage. Such tunable sensors provide greater optical simplicity because their spectral response is controlled electrically rather than optically or mechanically.…”

Section: Multispectral Classification With Bias-tunablementioning

confidence: 99%

Multispectral Classification With Bias-Tunable Quantum Dots-in-a-Well Focal Plane Arrays

et al. 2011

View full text Add to dashboard Cite

Mid-wave and long-wave infrared (IR) quantumdots-in-a-well (DWELL) focal plane arrays (FPAs) are promising technology for multispectral (MS) imaging and sensing. The DWELL structure design provides the detector with a unique property that allows the spectral response of the detector to be continuously, albeit coarsely, tuned with the applied bias. In this paper, a MS classification capability of the DWELL FPA is demonstrated. The approach is based upon: 1) imaging an object repeatedly using a sequence of bias voltages in the tuning range of the FPA and then 2) applying a classification algorithm to the totality of readouts, over multiple biases, at each pixel to identify the "class" of the material. The approach is validated for two classification problems: separation among different combinations of three IR filters and discrimination between rocks. This work is the first demonstration of the MS classification capability of the DWELL FPA. Index Terms-Bias tunability, dots-in-a-well (DWELL), infrared (IR) detector, multispectral (MS) classification, quantum-dots, rock classification.

show abstract

Section: Multispectral Classification With Bias-tunablementioning

confidence: 99%

Multispectral Classification With Bias-Tunable Quantum Dots-in-a-Well Focal Plane Arrays

et al. 2011

View full text Add to dashboard Cite

show abstract

“…However, in-plane polarized radiation causing transition to well bound first excited state(s) can hardly cause a strong photocurrent response. On the other hand, the mid-infrared response has been observed on many occasions in experiments performed in normal--incidence geometry [7,28,29]. This would contradict the results previously mentioned if one assumed ideally in-plane polarized radiation in these experiments.…”

Section: Intraband Optical Propertiesmentioning

confidence: 58%

Quantum Dots as Sources and Detectors οf Mid- and Far-Infrared Radiation: Theoretical Models

Vukmirović¹,

Indjin²,

Ikonić³

et al. 2009

Acta Phys. Pol. A

View full text Add to dashboard Cite

show abstract

“…When the polarity of the bias is altered to −2.5 and −3 V, the peak energy is shifted to 145 and 148 meV ͑8.55 and 8.4 m͒, respectively. We attribute this effect to a Stark shift [16][17][18] induced in the asymmetrically positioned QD layer embedded in the QW. When a bias is applied, the position of the QD and the QW energy levels will approximately follow the centroid of the QD and the QW, respectively.…”

Section: -mentioning

confidence: 95%

Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors

Höglund

Holtz

Pettersson

et al. 2008

Applied Physics Letters

View full text Add to dashboard Cite

Bias-mediated tuning of the detection wavelength within the infrared wavelength region is demonstrated for quantum dots-in-a-well and dots-on-a-well infrared photodetectors. By positioning the InAs quantum dot layer asymmetrically in an 8 nm wide In0.15Ga0.85As/GaAs quantum well, a shift in the peak detection wavelength from 8.4 to 10.3 µm was observed when reversing the polarity of the applied bias. For a dots-on-a-well structure, the peak detection wavelength was tuned from 5.4 to 8 µm with small changes in the applied bias. These tuning properties could be essential for applications such as modulators and dual-color infrared detection.Original Publication:Linda Höglund, Per-Olof Holtz, H. Pettersson, C. Asplund, Q. Wang, H. Malm, S. Almqvist, E. Petrini and J. Y. Andersson, Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors, 2008, Applied Physics Letters, (93), 203512.http://dx.doi.org/10.1063/1.3033169Copyright: American Institute of Physicshttp://www.aip.org

show abstract

Stark shift of the spectral response in quantum dots-in-a-well infrared photodetectors

Cited by 22 publications

References 28 publications

Multispectral Classification With Bias-Tunable Quantum Dots-in-a-Well Focal Plane Arrays

Multispectral Classification With Bias-Tunable Quantum Dots-in-a-Well Focal Plane Arrays

Quantum Dots as Sources and Detectors οf Mid- and Far-Infrared Radiation: Theoretical Models

Bias mediated tuning of the detection wavelength in asymmetrical quantum dots-in-a-well infrared photodetectors

Contact Info

Product

Resources

About