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Transparent AFM integration inside SEM and FIB chamber allows for unique protocols in NSOM cathode luminescence GaN nano wires
Near-field cathode luminescence from a GaN nanowire under ion beam excitation obtained with MultiView 2000TM in SEM chamber. On-line AFM (upper left) and NSOM (upper right) images obtained in collection mode. AFM/NSOM collage image is presented at bottom.
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AFM |
Raman |
NSOM |
Confocal |
Multiple Imaging modes of a transistor sample with the Nanonics MultiView series. |
AFM 3D |
Raman 3D |
NSOM 3D |
Confocal 3D |
AFM/NSOM Collage |
AFM/Raman Collage |
A: AFM topographic image of two slits on glass-coated gold surface imaged with AFM/NSOM fiber probe. The slits have 200nm width, 50nm thickness, 4µm length and 6µm separation. B: NSOM image in collection mode with AFM/NSOM fiber probe (50nm aperture) shows transmitted light above the slits. C: NSOM image shows the plasmons in the marked area between the two slits (see image B). WSxM software has been used for image processing of the pictures above: I. Horcas et al. Rev. Sci. Instrum. 78, 013705 (2007). • Nanonics’ MultiView systems with their tip-scanning capabilities and full integration with optical microscopes allow for efficient excitation and detection of plasmons. A dual optical microscope was used to obtain the above measurements. The lower microscope was used to excite the sample with a 532nm laser; the upper microscope was used to position the NSOM probe in the area of the slits. • AFM and NSOM images were simultaneously acquired with AFM/NSOM probe to obtain fully correlated topographic and NSOM data without any need to change the probe. • For the above measurements, it is critical to use tuning fork feedback to prevent any interference or background effects due to optical feedback. Ideal systems for this application: |
NSOM Nanoarray Plasmons image | |||
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As the injection current is increased the laser heats up and there is an alteration in the topography of the laser which alters the light distribution.
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NSOM light distribution |
AFM 20.5 mA |
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AFM |
collage of AFM with light distribution |
AFM & Light Distribution
Illustrated below: Distributed feedback laser structure, light distribution and collage of structure and light distribution at a low injection current.
AFM |
AFM |
light distribution 20.5 mA |
collage AFM/light distribution |
Near-field optics provides the capability to predict the near-field from far-field methods.
Far-Field |
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Near-Field |
The Distributed Feedback Laser AFM & NSOM Image at Higher Injection Currents (22.5 mA)
3D NSOM |
collage of AFM with light distribution |
Topography at 20.5mA
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Topography at 50mA (for comparison)
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NSOM Light Distribution
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Collage of AFM with Light Distribution
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As the injection current is increased the laser heats up and there is an alteration in the topography of the laser which alters the light distribution.
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As the injection current is increased the laser heats up and there is an alteration in the topography of the laser which alters the light distribution.
NSOM light distribution |
AFM 20.5 mA |
AFM |
collage of AFM with light distribution |
AFM & Light Distribution
Illustrated below: Distributed feedback laser structure, light distribution and collage of structure and light distribution at a low injection current.
AFM |
AFM |
light distribution 20.5 mA |
collage AFM/light distribution |
Near-field optics provides the capability to predict the near-field from far-field methods.
Far-Field |
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Near-Field |
The Distributed Feedback Laser AFM & NSOM Image at Higher Injection Currents (22.5 mA)
3D NSOM |
collage of AFM with light distribution |
Topography at 20.5mA
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Topography at 50mA (for comparison) |
NSOM Light Distribution |
Collage of AFM with Light Distribution |
As the injection current is increased the laser heats up and there is an alteration in the topography of the laser which alters the light distribution.
Figure 1: (Left) AFM image shows an isolated nanowire of carbon nanotube on a Silicon surface . (Right) Online Raman map of the CNT nanowire obtained online pixel-by-pixel with the AFM image (left). The Raman map shows Raman integrated intensity between the carbon bands at 1540cm-1 and 1640cm-1. Raman Mapping Parameters: Objective: 50 X LWD N.A=0.5 Raman step size (X & Y): 0,2 µm Laser 532 nm, grating: 600 l/mm Measurement time: 5s/point WSxM software has been used for image processing of the pictures above: I. Horcas et al. Rev. Sci. Instrum. 78, 013705 (2007).
Figure 2: (Left) A CNT nanowire Raman map shows a band shift of the G-band along the nanowire (1575cm-1, green) and the graphite cluster aggregates (1580cm-1, red). |
Yes, I'd like to discuss Apertureless NSOM with an application scientist
Yes, I'd like to discuss Reflection NSOM with an application scientist
Yes, I'd like to discuss Collection NSOM with an application scientist
Yes, I'd like to discuss Transmission NSOM with an application scientist
Yes, I'd like to discuss Fluorescence NSOM with an application scientist
Yes, I'd like to discuss Nano-Illumination NSOM with an application scientist