Highly integrated cantilever with light emitting diode, channel waveguide, aperture, and photodiode for scanning near-field optical microscope

2002 ◽  
Author(s):  
M. Sasaki ◽  
K. Tanaka ◽  
K. Hane
Keyword(s):  
Light Emitting Diode ◽  
Near Field ◽  
Optical Microscope ◽  
Channel Waveguide ◽  
Light Emitting

Spatial Inhomogeneity of Photoluminescence in an InGaN-Based Light-Emitting Diode Structure Probed by Near-Field optical Microscopy Under Illumination-Collection Mode

2001 ◽  
Vol 40 (Part 1, No. 1) ◽  
pp. 110-111 ◽  
Author(s):  
Akio Kaneta ◽  
Tomoaki Izumi ◽  
Koichi Okamoto ◽  
Yoichi Kawakami ◽  
Shigeo Fujita ◽  
...  
Keyword(s):  
Optical Microscopy ◽  
Light Emitting Diode ◽  
Near Field ◽  
Diode Structure ◽  
Spatial Inhomogeneity ◽  
Light Emitting

scholarly journals Complex Analysis of Emission Properties of LEDs with 1D and 2D PhC Patterned by EBL

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 748
Author(s):  
Lubos Suslik ◽  
Jaroslava Skriniarova ◽  
Jaroslav Kovac ◽  
Dusan Pudis ◽  
Anton Kuzma ◽  
...  
Keyword(s):  
Complex Analysis ◽  
Near Field ◽  
Optical Microscope ◽  
Considerable Effect ◽  
Light Extraction Efficiency ◽  
Far Field ◽  
Light Emitting ◽  
Surface Emission ◽  
Emission Enhancement ◽  
Radiation Properties

In this paper, we present the optical and electrical properties of surface-patterned GaAs-based Multiquantum Well (MQW) light emitting diodes (LEDs) with one- and two-dimensional photonic crystal (PhC) structures. Optical properties were analyzed in the near and far field, measured by a near-field scanning optical microscope and with a goniophotometer. We demonstrated a strong effect of patterned PhC on the radiation properties and the light extraction efficiency. Enormous surface emission enhancement reaching 110% confirmed the strong effect of the patterned structure on the coupling of the guided modes into the surface emission. Additionally, the considerable effect of the PhC structure diffraction on radiation pattern was confirmed in the near and far field and is in good agreement with the simulated shape of the optical field.

scholarly journals Mobilizing Skin Care: Measuring and Tracking External Conditions with Light Emitting Diodes

2019 ◽  
Vol 6 (2) ◽  
pp. 17
Author(s):  
Stephen J McNeill
Keyword(s):  
Uv Light ◽  
Respiratory Health ◽  
Light Emitting Diode ◽  
Near Field ◽  
Free Water ◽  
The United States ◽  
Skin Care ◽  
Uv Index ◽  
Light Emitting ◽  
External Conditions

Light emitting diode (LED) technology allows users to monitor their indoor and outdoor environments while engaged in various tasks. LED has long been touted for its direct benefits to the skin; now, new LED technology is monitoring many external conditions that directly relate to human skin and respiratory health. My Skin Track UV, from La Roche Posay, is an integrated near-field communication (NFC) app. The light emitting diode (LED) acts as a detector to capture UV light. The battery-free, water-proof LED is worn on clothing and the energy is read by transferring data from the sensor to a smartphone via NFC technology. Based on one’s UV exposure and other environmental factors, the app uses a closed-loop, proprietary algorithm to issue a notification when environmental exposure is at a level that contributes to the users’ specific skin concerns. Skin cancer is the most common form of cancer in the United States and is the easiest to prevent. My Skin Track UV measures UVA and UVB exposure, noting the maximum percentage of sun-stock – the recommended maximum daily allowance of UV based on skin tone and the UV index. It also tracks pollen, pollution, temperature, and humidity. This paper discusses application of LED and NFC technology and reviews similar skin care applications and health education, including uses and gratifications. The associated paper features background technological research behind the evolution of smart-phone UV skin monitoring. The paper also includes results from product demonstration.

Near-Field Electroluminescent Refrigeration System Consisting of Two Graphene Schottky Diodes

2020 ◽  
Vol 142 (7) ◽  
Author(s):  
Jaeman Song ◽  
Junho Jang ◽  
Mikyung Lim ◽  
Jungchul Lee ◽  
Seung S. Lee ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Near Field ◽  
Schottky Diodes ◽  
Electrical Power ◽  
Coefficient Of Performance ◽  
Semiconductor Diode ◽  
Design Parameters ◽  
Refrigeration System ◽  
Surface Polaritons ◽  
Light Emitting

Abstract It has been shown that the performance of a thermal radiative device, such as a thermophotovoltaic (TPV) and an electroluminescent (EL) refrigerator, can be significantly enhanced when the vacuum gap between a reservoir and a semiconductor diode becomes nanoscale. Recently, several studies have reported the integration of a TPV and a light emitting diode (LED) in one near-field thermal radiative device to improve the operation efficiency. However, surface polaritons were hardly exploited in previous research because bare semiconductor diodes were used. In this paper, we propose a TPV-LED integrated near-field EL refrigeration system consisting of two graphene-semiconductor Schottky diodes. A substantial refrigeration rate (101.9 kW/m2) is achieved owing to the coupling of surface plasmon-phonon polaritons excited by a symmetric configuration of graphene-polar materials. Moreover, the cooling coefficient of performance (COP) of the system can be enhanced up to 2.65 times by recycling the electrical power generated in the TPV cell. The cooling performance is further investigated in relation to design parameters, namely the doping concentration of Si and insulator thickness.

scholarly journals Near-field scanning optical microscopy with monolithic silicon light emitting diode on probe tip

2008 ◽  
Vol 92 (13) ◽  
pp. 131106 ◽  
Author(s):  
Kazunori Hoshino ◽  
Lynn J. Rozanski ◽  
David A. Vanden Bout ◽  
Xiaojing Zhang
Keyword(s):  
Optical Microscopy ◽  
Light Emitting Diode ◽  
Near Field ◽  
Light Emitting ◽  
Scanning Optical Microscopy ◽  
Near Field Scanning
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