Institute of Electrical and Electronic Engineers (IEEE)
IEEE Journal of Quantum Electronics
The quantum-confined Stark effect in intersublevel transitions present in quantum-dots-in-a-well (DWELL) detectors gives rise to a midIR spectral response that is dependent upon the detector's operational bias. The spectral responses resulting from different biases exhibit spectral shifts, albeit with significant spectral overlap. A postprocessing algorithm was developed by Sakoglu that exploited this bias-dependent spectral diversity to predict the continuous and arbitrary tunability of the DWELL detector within certain limits. This paper focuses on the experimental demonstration of the DWELL-based spectral tuning algorithm. It is shown experimentally that it is possible to reconstruct the spectral content of a target electronically without using any dispersive optical elements for tuning, thereby demonstrating a DWELL-based algorithmic spectrometer. The effects of dark current, detector temperature, and bias selection on the tuning capability are also investigated experimentally.
Jang, Woo-Yong; Hayat, Majeed M.; Tyo, J. Scott; Attaluri, Ram S.; Vandervelde, Thomas E.; Sharma, Yagya D.; Shenoi, Rajeev; Stintz, Andreas; Cantwell, Elizabeth R.; Bender, Steven C.; Lee, Sang Jun; Noh, Sam Kyu; and Krishna, Sanjay, "Demonstration of Bias-Controlled Algorithmic Tuning of Quantum Dots in a Well (DWELL) MidIR Detectors" (2009). Electrical and Computer Engineering Faculty Research and Publications. 590.
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