Fabrication, characterization and its local reflection properties of a metal-mirror microcavity with high concentrated PIC J-aggregates

Oda, Masahiro; Saito, Keita; Higashi, Kohei; Tani, Tadaaki

doi:10.1016/j.phpro.2010.01.229

Cited by 7 publications

(13 citation statements)

References 12 publications

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“…We confirmed that the observed 2Δ, which easily exceeded more than 150 meV, increased with increasing J concentration [16], as predicted theoretically [19,20]. It is not easy to control the concentration of Js or even their shape and size in an actual device structure.…”

Section: Introductionsupporting

confidence: 86%

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Room-Temperature Fluorescence Lifetime of Pseudoisocyanine (PIC) J Excitons with Various Aggregate Morphologies in Relation to Microcavity Polariton Formation

Saitoh

Oda

Tani

2012

IJMS

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The results of room-temperature fluorescence lifetime measurements are reported for the excitation of J aggregates (Js) of pseudoisocyanine chloride (PIC-Cl) prepared in potassium polyvinyl sulfate (PVS) polymer thin films, their aqueous solutions, and NaCl aqueous solutions. Variations of the microscopic morphologies of the aggregates were investigated. The results show that fluorescence decay features correlated to the morphology change. The observed fluorescence lifetime and quantum efficiency of PIC J aggregates (PIC-Js) in a NaCl aqueous solution were 310 ps and 28%, respectively. The lifetime of the fibril-shaped macroaggregates prepared in PVS thin films was below the instrumental time resolution of 5 ps, and the efficiency decreased to below 3%. The results indicate that PIC-Js prepared with PVS polymers have an increased nonradiative contribution to the excitation deactivation process. In particular, macro-Js with isolated fibril-shaped structures revealed nonradiative pathway(s) that are closely associated to the specific packaging morphology of the constituent meso-Js. The possibility of a destructive effect on the formation of cavity-polaritons is also discussed.

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Section: Introductionsupporting

confidence: 86%

“…Both were reinvestigated on newly prepared samples using angle-resolved microscopy; the details are described elsewhere [15,16]. …”

Section: Resultsmentioning

confidence: 99%

Room-Temperature Fluorescence Lifetime of Pseudoisocyanine (PIC) J Excitons with Various Aggregate Morphologies in Relation to Microcavity Polariton Formation

Saitoh

Oda

Tani

2012

IJMS

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“…In our previous works, we have investigated planer metal-metal microcavity structures with active layers of a polymeric thin film containing pseudoisocyanine (PIC) J-aggregates. Large VRS ranging from 50 meV to 250 meV is achieved in the microcavity structures, and we have confirmed that the VRS increases basically with increasing the density of the J-aggregates, as is predicted in a theoretical study [5].…”

supporting

confidence: 88%

“…Figure 3(a) shows a typical example of microscope reflection image of the nonfibril type sample with normal incidence. The micrometerscale inhomogeneity in the reflection image is mainly due to local distribution change in the PIC-J's concentration [5], however, they possess negligible effect on the reflectivity spectra. Figure 3(b) shows reflectivity spectra of non-fibril samples at the location indicated by an arrow in Fig.…”

mentioning

confidence: 98%

“…To perform them locally on each single fibril-J, we modified the detection portion of ordinary invertedtype optical microscope (Nikon; TE-2000U). Such technique for the local detection is introduced in our previous work [5]. Briefly, selection of the light flux incident onto the back focal plane of the objective through the offcentred pinhole from the optic axis of the microscope allows the oblique incidence.…”

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confidence: 99%

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Anomalous reflection properties in high density limit fibril shaped PIC‐J aggregates in microcavity structure

Saitoh

Oda

Tani

2011

Phys. Status Solidi (c)

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We report our recent observations on anomalous reflection properties of organic microcavity containing PIC J‐aggregates in fibril‐shaped structures as one of their highest‐density limiting case. Even in ordinary low density PIC‐Js dispersed in polymer matrices, they easily go into the exciton‐photon strong coupling regime and new quantum states, i.e. exciton‐polaritons, are formed. Vacuum Rabi‐splitting, an indicator of the coupling strength, can be controlled by the density of PIC‐Js in the microcavities in low density regime. Fibril‐shaped PIC‐J aggregates are bundle‐like, self‐assembled higher‐order structure of Js and are considered as a high‐density limiting case. Angular dependence of the local reflection spectra are observed by our improved microscopy. While in the low density cases, clear anti‐crossing behaviours of the two branches appear, which is the evidence of the polariton formations, the highest‐density limiting cases show one or two anomalous reflection dip structures with almost no angular dependence. The result is inconsistent with neither ordinary polariton reflection property nor bare exciton nor cavity photon properties. We tentatively consider that the anomaly is inherent to the fibril formation and is caused by possible breakdown of polariton coherence due to the inter‐fiber energy transfer. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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Stackable spectral-sensitive conductive films based on cyanine aggregates via an inkjet method

et al. 2013

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Fabrication, characterization and its local reflection properties of a metal-mirror microcavity with high concentrated PIC J-aggregates

Cited by 7 publications

References 12 publications

Room-Temperature Fluorescence Lifetime of Pseudoisocyanine (PIC) J Excitons with Various Aggregate Morphologies in Relation to Microcavity Polariton Formation

Room-Temperature Fluorescence Lifetime of Pseudoisocyanine (PIC) J Excitons with Various Aggregate Morphologies in Relation to Microcavity Polariton Formation

Anomalous reflection properties in high density limit fibril shaped PIC‐J aggregates in microcavity structure

Stackable spectral-sensitive conductive films based on cyanine aggregates via an inkjet method

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