Accession Number : ADA596355


Title :   Demonstration of Bias-Controlled Algorithmic Tuning of Quantum Dots in a Well (DWELL) MidIR Detectors


Descriptive Note : Journal article


Corporate Author : NEW MEXICO UNIV ALBUQUERQUE DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE


Personal Author(s) : Jang, Woo-Yong ; Hayat, Majeed M ; Tyo, J S ; Attaluri, Ram S ; Vandervelde, Thomas E ; Sharma, Yagya D ; Shenoi, Rajeev ; Stintz, Andreas ; Cantwell, Elizabeth R ; Bender, Steven C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a596355.pdf


Report Date : Jun 2009


Pagination or Media Count : 11


Abstract : 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 et al. 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.


Descriptors :   *BIAS , *QUANTUM DOTS , ALGORITHMS , DISPERSIONS , OPTICAL EQUIPMENT COMPONENTS , SPECTROMETERS , STARK EFFECT , TRANSITIONS , TUNING


Subject Categories : Numerical Mathematics
      Quantum Theory and Relativity
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE