Broadband absorption enhancement in an uncooled microbolometer infrared detector

Download

index.pdf

Date

2014-05-08

Author

Kebapci, Basak
Dervisoglu, Ozgecan
Battal, Enes
OKYAY, Ali Kemal
Akın, Tayfun

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

125
views

0
downloads

This paper introduces a method for a broadband absorption enhancement in the LWIR range (8-12 µm), in single layer microbolometer pixels with 35 μm pitch. For the first time in the literature, this study introduces a very simple and low cost approach to enhance the absorption by embedding plasmonic structures at the same level as the already existing metallic layer of a microbolometer pixel. The metal layer comprises the electrode and the arm structures on the body. Even though the periodicity of the plasmonic structures is slightly disturbed by the placement of the electrodes and the connecting metal, the metal arms and the electrodes compensate for the lack of the periodicity contributing to the resonance by their coupling with the individual plasmonic resonators. Various plasmonic structures are designed with FDTD simulations. Individual, plasmonically modified microbolometer pixels are fabricated, and an increase in the average absorption due to surface plasmon excitation at Au/Si3N4 interfaces is observed. Plasmonic structures increase the average absorption from 78% to 82% and result in an overall enhancement of 5.1%. A good agreement between the simulation and the FTIR measurement results are obtained within the LWIR range. This work paves the way for integration of the plasmonic structures within conventional microbolometer devices for performance enhancement without introducing additional costs.

Subject Keywords

Microbolometers, Absorption enhancement, LWIR, Broadband, Surface plasmons

URI

https://hdl.handle.net/11511/34661

DOI

https://doi.org/10.1117/12.2069937

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Image resolution upscaling in the wavelet domain using directional cycle spinning Temizel, Alptekin (2005-10-01) Cycle spinning, a technique mainly used for wavelet denoising, has also been shown to be successful toward image resolution upscaling in the wavelet domain. We propose a directional variant of the cycle spinning methodology. We obtain estimates of local edge orientation from a wavelet decomposition of the available low-resolution image and use this information to influence the choice of cycle spinning parameters that are employed for resolution upscaling. Our experimental results show that the proposed meth...
Column Parallel Incremental Zoom ADC for Uncooled Imaging Applications Beyenir, Aycan; Akın, Tayfun; Department of Electrical and Electronics Engineering (2022-8-11) This thesis presents a new column-parallel analog to digital converter (ADC) integrated circuit with high precision (20-bit), high signal-to-noise ratio (119.5 dB), low power incremental Zoom ADC architecture and demonstrates its integration to a 384x288 pixel format analog output microbolometer readout integrated circuit (ROIC) with 25µm pixel pitch. The Zoom ADC is a hybrid of a low-resolution successive approximation register (SAR) ADC and a high-resolution Delta-Sigma ADC. The main aim of this design is...
Noise analysis and characterization of a sigma-delta/capacitive microaccelerometer Külah, Haluk; Yazdi, N; Najafi, K (2006-02-01) This paper reports a high-sensitivity low-noise capacitive accelerometer system with one micro-g/root Hz resolution. The accelerometer and interface electronics together operate as a second-order electromechanical sigma-delta modulator. A detailed noise analysis of electromechanical sigma-delta capacitive accelerometers with a final goal of achieving sub-jig resolution is also presented. The analysis and test results have shown that amplifier thermal and sensor charging reference voltage noises are dominant...
Capturing and detection of MCF-7 breast cancer cells with a CMOS image sensor Musayev, Javid; Altiner, Caglar; Adiguzel, Yekbun; Külah, Haluk; Eminoglu, Selim; Akın, Tayfun (2014-08-15) This paper presents a CMOS image sensor with a 32 x 32 pixel array for cell capture, detection, and quantification. Pixels measuring 15 pm x 15 mu m have a modified structure, suitable for post-CMOS electroless gold plating, which enables surface activation for cell capture without the need for any intermediate layer. This structure also increases the detection probability of captured cells, even when cells are much smaller than the pixel, owing to a special light mask implemented on pixels. Cells as small ...
Continuous dimensionality characterization of image structures Felsberg, Michael; Kalkan, Sinan; Kruger, Norbert (Elsevier BV, 2009-05-04) Intrinsic dimensionality is a concept introduced by statistics and later used in image processing to measure the dimensionality of a data set. In this paper, we introduce a continuous representation of the intrinsic dimension of an image patch in terms of its local spectrum or, equivalently, its gradient field. By making use of a cone structure and barycentric co-ordinates, we can associate three confidences to the three different ideal cases of intrinsic dimensions corresponding to homogeneous image patche...

Citation Formats

B. Kebapci, O. Dervisoglu, E. Battal, A. K. OKYAY, and T. Akın, “Broadband absorption enhancement in an uncooled microbolometer infrared detector,” 2014, vol. 9070, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34661.