Pdaf Pixel With Plasmonic Nanostructures

• doi: 10.1109/JSEN.2025.3534230
• title: PDAF Pixel With Plasmonic Nanostructures
• publisher: IEEE
• isbn:
• issn: 2379-9153
• rank: 3214
• access_type: LOCKED
• content_type: Journals
• abstract: The sub micrometer pixel pitch of CMOS image sensors improves the resolution and functionality of image sensors. To achieve the high optical performance of sensors, optical characteristics, such as sensitivity and crosstalk, should be satisfied. However, due to the tradeoffs between resolution and sensitivity, it is necessary to enhance the aspect ratio of pixel structures. In this study, we propose a phase detection autofocus (PDAF) pixel with a plasmonic nanostructure. Not only the wavelength selectivity but also the incident angle dependency of the proposed structure is adapted for the PDAF function. We fabricated the metal–insulator–metal (MIM) structure above the photodetector for red and near-infrared (NIR) pixels. Sensitivity was measured, and the angular response for the autofocus (AF) function was confirmed. Moreover, the AF contrast, which verifies the performance of the AF pixel, was calculated to be 2.2 at the red pixel and 2.7 at the NIR pixel. The experimental results confirmed that the suggested MIM structure is effective for PDAF pixels.
• article_number: 10891340
• pdf_url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891340
• html_url: https://ieeexplore.ieee.org/document/10891340/
• abstract_url: https://ieeexplore.ieee.org/document/10891340/
• publication_title: IEEE Sensors Journal
• conference_location:
• conference_dates:
• publication_number: 7361
• is_number: 10947226
• publication_year: 2025
• publication_date: 1 April1, 2025
• start_page: 10934
• end_page: 10941
• citing_paper_count: 0
• citing_patent_count: 0
• download_count: 35
• insert_date: 20250217
• index_terms:
  • ieee_terms:
    • Metals
    • Sensors
    • Optical sensors
    • Sensitivity
    • Optical imaging
    • Optical surface waves
    • Optical filters
    • Optical device fabrication
    • Wavelength measurement
    • Surface waves
  • author_terms:
    • CMOS image sensor
    • metal-insulator–metal (MIM)
    • phase detection autofocus (PDAF)
    • plasmonic nanostructures
  • dynamic_index_terms:
    • Plasmonic
    • Phase-detection Autofocus
    • Aspect Ratio
    • Incident Angle
    • Image Sensor
    • Camera Sensor
    • Metallic Structures
    • Optical Performance
    • Wavelength Selection
    • Selection Of Wavelengths
    • Pixel Pitch
    • Angular Response
    • Thin Films
    • Alumina
    • Phase Difference
    • Surface Plasmon Resonance
    • Quantum Efficiency
    • Metal Layer
    • Electron Beam Lithography
    • E-beam Lithography
    • Peak Wavelength
    • Wavelength Shift
    • Silicon Nitride
    • Plasma-enhanced Chemical Vapor Deposition
    • PECVD
    • Near-infrared Wavelengths
    • Mobile Camera
    • Mobile Phone Camera
    • Cell Phone Camera
    • Normal Angle
    • Polymethyl Methacrylate Layer
    • Layer Of Poly Methyl Methacrylate
    • Oblique Angle
    • Incident Angle Of Light
    • Grating Period
    • Metal-dielectric Interface
    • Dielectric-metal Interface
    • Near-infrared Range
    • Color Filter
• authors:
  • Author Name: Godeun Seok
    Affiliation: Department of ICT Integrated Safe Ocean Smart Cities Engineering, Dong-A University, Busan, South Korea
    Author URL: https://ieeexplore.ieee.org/author/816906416829284
    ID: 816906416829284
    Order: 1
    Author Affiliations:
    • Department of ICT Integrated Safe Ocean Smart Cities Engineering, Dong-A University, Busan, South Korea
  • Author Name: Sungjin An
    Affiliation: Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37086628920
    ID: 37086628920
    Order: 2
    Author Affiliations:
    • Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
  • Author Name: Myoung-Jae Lee
    Affiliation: Division of Nanotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37086421012
    ID: 37086421012
    Order: 3
    Author Affiliations:
    • Division of Nanotechnology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea
  • Author Name: Yunkyung Kim
    Affiliation: Department of ICT Integrated Safe Ocean Smart Cities Engineering and the Department of Electronics Engineering, Dong-A University, Busan, South Korea
    Author URL: https://ieeexplore.ieee.org/author/37086824897
    ID: 37086824897
    Order: 4
    Author Affiliations:
    • Department of ICT Integrated Safe Ocean Smart Cities Engineering and the Department of Electronics Engineering, Dong-A University, Busan, South Korea

Image Sensor

• sensor_type: CMOS
• resolution: Not specified
• dynamic_range: Not specified
• pixel_size: Sub micrometer pitch
• dark_current: Not specified

Optical Data

• focal_length: Not specified
• aperture: Not specified
• field_of_view: Not specified
• distortion: Not specified

Performance Metrics

Applications & Benefits

• cell_imaging: Enabled by high-resolution and high-sensitivity image sensors for mobile devices.
• benefits: PDAF functionality, high sensitivity, multifunctionality, and wavelength selectivity.

Supporting Organizations

• supported_by: Dong-A University Research Fund

Manuscript Details

• publication_date: 1 April1, 2025

Relevancy Score

• score: 8
• missing_fields:
  • resolution
  • dynamic_range
  • dark_current
  • focal_length
  • aperture
  • field_of_view
  • distortion
  • frame_rate
  • signal_to_noise_ratio
  • sensitivity
  • shutter_speed
  • power_consumption
  • noise

Processed JSON Filename

request_e1c08ef6-c792-4236-98ed-3d3bf334b0eb-pdaf_pixel_with_plasmonic_nanostructures.json