Near-infrared QW LED spectroscopy for viral infections detection and analysis

Abdullah J. Zakariya; Husain A. Naqi

doi:10.1117/12.2632714

30 September 2022 Near-infrared QW LED spectroscopy for viral infections detection and analysis

Proceedings Volume 12234, Infrared Sensors, Devices, and Applications XII; 1223402 (2022) https://doi.org/10.1117/12.2632714
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

We propose a monolithic broad multi-wavelength NIR LED device to function as a main analysis and viral infections detection component in clinical biology testing equipment. Area selective Quantum Well Intermixing (QWI) is used to produce miniature size LEDs on a single QW substrate. In this research, SiO2 layers that range between 0nm to 400nm with a 50nm thickness steps over separated regions are deposited to create eight regions of different bandgaps. The thicker the diffusion layer the larger the blue shift. Consequently, eight LEDs that emit light in eight different wavelengths each with its individual contact pad are fabricated. Each LED emits a specific wavelength individually that corresponds to the thickness of the deposited SiO2 layer by injecting electrical current into its contact pad and light emission is collected at a single output. As a result, the device can produce light from a single or multiple LEDs simultaneously. For our research, a simultaneous current injection into all LEDs is required to produce a broad infrared light. The LEDs electroluminescence when current is injected at 37mA results in eight wavelengths of: 797,804, 810, 816, 823, 831, 837, 850nm with an average LED responsivity of ~0.4W/A. A calculated average of the optical output shows a broad infrared spectrum from a single structure that can be easily integrated into modern biological analytical tools.

Conference Presentation

Citation Download Citation

Abdullah J. Zakariya and Husain A. Naqi "Near-infrared QW LED spectroscopy for viral infections detection and analysis", Proc. SPIE 12234, Infrared Sensors, Devices, and Applications XII, 1223402 (30 September 2022); https://doi.org/10.1117/12.2632714

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