The plasmon resonance scattering measurements were carried out on an inverted dark-field microscope (eclipse Ti-U, Nikon) using a ×40 objective lens (numerical aperture, 0.6) and a dark-field condenser (0.8 < numerical aperture < 0.95). A halogen lamp (100 W) was used as a source of white light to generate plasmon resonance scattering light. The dark-field images were captured by a true-colour digital camera (Nikon DS-fi). The light scattered from the bifunctionalized nanoantennae was split by a monochromator (grating density, 300 lines mm–1; blazed wavelength, 500 nm; Acton SP2300i, Princeton Instruments). An IsoPlane-320 spectrometer was used, and the split light was collected by a charge-coupled device (Pixis 100BX, Princeton Instruments). An a.c. EF of 3 MHz at 0.65 V was applied for 10 min, and scattering spectra were monitored (1,000 frames recorded). The exposure time was 500 ms. The samples for plasmon resonance scattering were prepared by immobilizing nanoantennae on ITO. First, ITO slides were treatment with ethanol, acetone and water under sonication. Next, 50 µl nanoantennae solution was drop-casted on the ITO slides for 10 min, followed by a single-step washing and rinsing with water. Finally, the slides were dried with N2 gas.
Acton sp2300i
Manufactured by Teledyne
Sourced in United States
The Acton SP2300i is a high-performance spectrograph that provides precise and reliable spectral analysis. It features a compact and versatile design, making it suitable for a variety of laboratory applications. The Acton SP2300i is equipped with a wide range of gratings and wavelength ranges to accommodate diverse spectroscopic requirements.
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Lab products found in correlation
Ds fi, by Nikon (1 mentions)
Pixis 100bx, by Teledyne (1 mentions)
Eclipse ti u, by Nikon (1 mentions)
R928 photomultiplier tube, by Hamamatsu Photonics (1 mentions)
Spc 150, by Becker & Hickl (1 mentions)
Hydraharp 400, by PicoQuant (1 mentions)
Axiovert 200, by Zeiss (1 mentions)
Xpi max 4 ccd camera, by Teledyne (1 mentions)
Spectramax m2 spectrometer, by Molecular Devices (1 mentions)
6 protocols using acton sp2300i
1
Plasmonic Nanoantenna Scattering Characterization
2
Emission Spectroscopy of Photosensitive Sample
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The sample was prepared in an air saturated as well as a degassed acetonitrile solution with an absorption of 0.2 at 450 nm. The sample was irradiated at 450 nm with a NT342B Nd-YAG pumped optical parametric oscillator (Ekspla). The emission was focused at right angle to the excitation pathway and directed to a Princeton Instruments Acton SP-2300i monochromator. The signal was detected with a R928 photomultiplier tube (Hamamatsu).
3
Ultrafast Carrier Dynamics Probed by PPP
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Femtosecond PPP experiments were performed with a home-built setup in transmission geometry. A small portion of the output from a Coherent Libra regenerative amplifier (50 fs, 1 kHz, 800 nm) was split off to generate a white-light continuum, while the remainder was used to pump two Coherent OPerA Solo optical parametric amplifiers (OPAs). A 750-nm short-pass filter was placed in the probe arm before the sample to attenuate the 800-nm fundamental beam used for white-light continuum generation (we estimated a probe fluence of ~0.14 μJ cm−2 at ~1.63 eV). One OPA was used to generate the pump pulse train (2.07 or 3.10 eV), and the other OPA was used to generate the push pulse train. The pump is chopped at 83 Hz, in combination with a modulated push, and the pump-probe and PPP signals can be obtained separately and averaged across at least three scans. Taking the difference yields the push-induced signal (described in the main text under the section “Carrier relaxation probed by PPP spectroscopy”). Both push and probe pulse trains are mechanically delayed by precision delay stages, and the probe is collected by a spectrometer (Princeton Instruments Acton SP-2300i) coupled to a photomultiplier tube point detector and collected by the computer through an SRS 830 lock-in amplifier.
4
Nonlinear Emission Characterization of Dual-Clad Fibers
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The measurement set-up was similar to the system schematic except that the emission signal was sent to a grating-based monochromator (Acton SP2300i, Princeton Instruments, Inc., Trenton, NJ, USA) and detected by a photon-counting module (SPC-150, Becker & Hickl GmbH, Berlin, Germany) along with a photomultiplier tube (PMT; H7422P-50, Hamamatsu Photonics, Hamamatsu City, Japan). We coupled femtosecond laser pulses (λcenter~890 nm) into the DCF core and detected the backward-propagating nonlinear emission exiting the proximal end of the DCF. The photomultiplier tube was cooled to ensure a stable dark count rate (~120 photons s−1). The emission spectra were characterized at a 1-nm interval, and the total emission was averaged over 12 s to estimate the emission rate. The fiber length (~75 cm) and laser power propagated within the fiber (40 mW) were maintained the same for the three pieces of DCFs under testing, with the distal end of the DCF exposed to air. Physical parameters of the two commercial DCFs are listed below: (1) SM-GDF-5/130 from NuFern, Inc. (East Granby, CT, USA), which has a single-mode core 5 μm in diameter and 0.12 NA and an inner clad 130 μm in diameter and 0.46 NA; (2) SMM900 from Fibercore Ltd. (Chilworth, Southampton, UK), which has a mode-field diameter of 6.5–8.2 μm at 1550 nm and a core NA of 0.18–0.20 and an inner clad 100 μm in diameter and 0.24–0.28 NA.
5
Single-Particle Optical Characterization of Nanoplatelet Emitters
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Highly dilute solutions (∼10–12 M NPL concentration) of doped and pure 5-ML thick NPLs in hexane were spin coated onto a glass cover slip. The sample was measured using an optical setup built around a commercial microscope (Axiovert 200, Zeiss). 473 nm 100 ps laser pulses at 5–20 MHz repetition rate (EPL 470, Edinbrough Instruments) were tightly focused through a 1.3 N.A. objective lens (Zeiss) to a diffraction limited spot. PL light was collected through the same objective lens passing through a dichroic mirror (488LP Semrock) and a long-pass dielectric filter (488LP Semrock). Light was then steered into one of the two ports. The first was a Hanbury-Brown and Twiss setup in which light, including the entire PL spectrum, was coupled into a split-fiber coupled to two avalanche photo diodes (APDs) (Perkin Elmer SPCM). The APD signal was routed into a timing module (Picoquant, Hydraharp 400) and was analyzed digitally using MATLAB software. The second port was a fiber coupled spectrometer (Princeton Instruments, Acton SP2300i) equipped with a 300 g mm–1 grating whose output was measured using a cooled CCD (Pixis, Princeton Instruments).
Approximately 100 single particles of the undoped, doped Te-powder and Te–TOP samples were examined altogether.
Approximately 100 single particles of the undoped, doped Te-powder and Te–TOP samples were examined altogether.
6
Measuring Absorption and Emission Spectra
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The absorption spectra of the sample was measured with a SpectraMax M2 Spectrometer (Molecular Devices). For measurement of the emission, the sample was irradiated at 450 nm with a NT342B Nd-YAG pumped optical parametric oscillator (Ekspla). The emission was focused at right angle to the excitation pathway and directed to a Princeton Instruments Acton SP-2300i monochromator. The signal was detected with a XPI-Max 4 CCD camera (Princeton Instruments).
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