Modulation of surface plasmon wave by photo-induced refractive index changes of CdSe quantum dots

Chen, Horng Shyang; Wang, Jyh Yang; Yeh, Sheng-Shiuan; Chen, Chii Dong; Lin, Hsin‐Yu

doi:10.1063/1.3673560

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…A similar effect was observed recently in indium tin oxide nanorods supporting plasmons in the infrared [129]. There are interferometers in which refractive index modulation by a light pulse on a photo-refractive material induces a phase shift in one beam path changing the interference state and therefore the plasmon intensity [130][131][132][133]. This method can be used with magneto-optical materials [134].…”

Section: Modulation By External Lightsupporting

confidence: 69%

Plasmonic circuits for manipulating optical information

2016

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Surface plasmons excited by light in metal structures provide a means for manipulating optical energy at the nanoscale. Plasmons are associated with the collective oscillations of conduction electrons in metals and play a role intermediate between photonics and electronics. As such, plasmonic devices have been created that mimic photonic waveguides as well as electrical circuits operating at optical frequencies. We review the plasmon technologies and circuits proposed, modeled, and demonstrated over the past decade that have potential applications in optical computing and optical information processing.

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Section: Modulation By External Lightsupporting

confidence: 69%

Plasmonic circuits for manipulating optical information

2016

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“…Then, the surface was rinsed with ACT buffer for 5 min and reacted with mIgG dissolved in ACT buffer at a concentration of 50 μg/mL. The surface mass density of covalently immobilized mIgG was varied from Γ = 0 to 27 ng/mm 2 (as observed from respective changes in the thickness d h and refractive index n h (5)) by adjusting the reaction time between 0 and 60 min. Finally, the unreacted TFPS moieties were blocked by 20 min of incubating in a 1 M ETA solution, followed by rinsing with PBS for 10 min.…”

Section: Methodsmentioning

confidence: 99%

“…1 Fast and reversible tuning of surface plasmons is crucial to harness the potential of plasmonics in important areas such as signal processing, optical sensors, and biosensors. Up to now, the interfacing of metallic structures with dielectric materials for electro-optical, 2 thermo-optical, 3 magneto-optical, 4 photoinduced, 5 and electrochemical 6 -based modulating of refractive index was pursued for rapid tuning of surface plasmon resonance (SPR). However, these approaches typically allow for only weak refractive index changes (<10 –2 to 10 –3 ) 7 that are not sufficient to control SPR efficiently.…”

Section: Introductionmentioning

confidence: 99%

Active Control of SPR by Thermoresponsive Hydrogels for Biosensor Applications

et al. 2013

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The use of thermoresponsive poly(N-isopropylacrylamide)-based hydrogel (pNIPAAm) for rapid tuning of surface plasmon resonance (SPR) is reported. This approach is implemented by using an SPR layer architecture with an embedded indium tin oxide microheater and pNIPAAm film on its top. It takes advantage of rapid thermally induced swelling and collapse of pNIPAAm that is accompanied by large refractive index changes and leads to high thermo-optical coefficient of dn/dT = 2 × 10–2 RIU/K. We show that this material is excellently suited for efficient control of refractive index-sensitive SPR and that it can serve simultaneously as a 3D binding matrix in biosensor applications (if modified with biomolecular recognition elements for a specific capture of target analyte). We demonstrate that this approach enables modulating of the output signal in surface plasmon-enhanced fluorescence spectroscopy biosensors and holds potential for simple time-multiplexing of sensing channels for parallelized readout of fluorescence assays.

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“…The sensitivity of plasmonic resonance to the refractive index of the dielectric surroundings affords us a convenient alternative to adjust the lasing wavelength through varying the refractive index. 22–24 Integrating plasmonic lattices within microfluidic channels and flowing liquid gain materials with different refractive indices has been proven to be very effective in dynamically modulating the output wavelength of plasmonic lasers. 25 Unfortunately, the reliance on liquid gain materials results in poor compactness and integrability of the devices, which restricts the practical applications in on-chip integration.…”

mentioning

confidence: 99%