In-plane remote photoluminescence excitation of carbon nanotube by propagating surface plasmon

Abstract

In this work, we demonstrate propagating surface plasmon polariton (SPP) coupled photoluminescence (PL) excitation of single-walled carbon nanotube (SWNT). SPPs were launched at a few micrometers from individually marked SWNT, and plasmon-coupled PL was recorded to determine the efficiency of this remote in-plane addressing scheme. The efficiency depends upon the following factors: (i) longitudinal and transverse distances between the SPP launching site and the location of the SWNT and (ii) orientation of the SWNT with respect to the plasmon propagation wave vector (k SPP ). Our experiment explores the possible integration of carbon nanotubes as a plasmon sensor in plasmonic and nanophotonic devices. [8,10,11], and large optical gain [12] create a strong motivation to explore the integration of SWNT optical properties in a plasmonic platform.In this Letter, we report on remote in-plane photoluminescence (PL) excitation of individual SWNT by propagating SPPs in metal thin film strip waveguides. Our experiment provides critical information on the coupling properties between a propagating surface plasmon mode and electronic resonances of an individual SWNT.High pressure carbon monoxide (HiPCO) synthesized SWNTs were dispersed in a 1% wt. sodium dodecyl sulfate solution by sonication and were subsequently processed by centrifugation [8]. The nanotubes used in our experiment range in diameter between 0.7-1.2 nm. Nanotubes were randomly deposited on top of plasmonic waveguides by spin coating. The strip waveguides were fabricated by standard electron-beam lithography and lift-off processes on indium tin oxide (ITO)-coated cover glass slips. The structure consists of Au strips of varying length (∼10-30 μm), with a width of 5 μm and a thickness of 35 nm.

Tailored nanoantennas for directional Raman studies of individual carbon nanotubes

“…The information obtained from RBM must be combined with that deduced from G mode features, i.e., the splitting and the relative intensity of the G + and G − peaks, and the width and shape of the G − . For instance, in our experiment the combination of RBM and G mode data (measured at λ L = 532 nm) allows us to conclude [31] that the bundle B likely contains a (22,15) CNT. The bundle C contains a semiconducting CNT with either (26,0) or (25,2) chiral indices (λ L = 532 nm) and a metallic CNT with either (21,6) or (20,8) [46].…”

“…Finally, we notice that the diameter of the (22,15) CNT (d = 2.52 nm) is compatible with the bundle diameter found by AFM (d ≈ 2.5 nm). This indicates that the (22,15) is the largest CNT of the bundle.…”

“…This particular choice is motivated by the fact that the Raman spectrum of graphene is well known, and it is relatively easy to transfer a single layer on top of selected patterned structures. However, owing to their extremely anisotropic optical properties, carbon nanotubes (CNTs) appear in many respects to be more intriguing candidates for target structures [19][20][21][22]. Raman spectroscopy of individual CNTs is usually difficult, due to their small cross section.…”

Electrical Excitation of Surface Plasmons by an Individual Carbon Nanotube Transistor

“…The origin of p-type conduction in our device is mainly due Pd/Au contacts and operation at ambient condition [13,14]. SEM during the device fabrication did not show PL emission [20]. The EL (red square) and PL (black circle) spectra are shown together in Fig.…”

“…A 250 nm thick layer of SiO 2 was then deposited on the ITO to act as a dielectric spacer. A solution of high pressure carbon monoxide synthesized SWNTs [19,20] were randomly deposited on the prepared ITO-gated substrate.…”