Enhancement of carbon nanotube photoluminescence by photonic crystal nanocavities

Watahiki, R.; Shimada, Takashi; Zhao, Peida; Chiashi, Shohei; Iwamoto, Satoshi; Arakawa, Yasuhiko; Maruyama, Shigeo; Kato, Yuichiro

doi:10.1063/1.4757876

Cited by 59 publications

(51 citation statements)

References 30 publications

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“…The cavities are characterized with a laser-scanning confocal microscope [7,18]. A wavelength-tunable continuous-wave Ti:sapphire laser allows for PL excitation (PLE) spectroscopy, and PL images are acquired by scanning the laser beam with a fast steering mirror.…”

Section: Excitation Resonances In a Photonic Crystal Nanocavitymentioning

confidence: 99%

Localized Guided-Mode and Cavity-Mode Double Resonance in Photonic Crystal Nanocavities

et al. 2015

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We investigate the use of guided modes bound to defects in photonic crystals for achieving double resonances. Photoluminescence enhancement by more than 3 orders of magnitude is observed when the excitation and emission wavelengths are simultaneously in resonance with the localized guided mode and cavity mode, respectively. We find that the localized guided modes are relatively insensitive to the size of the defect for one of the polarizations, allowing for flexible control over the wavelength combinations. This double-resonance technique is expected to enable the enhancement of photoluminescence and nonlinear wavelength-conversion efficiencies in a wide variety of systems.

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Section: Excitation Resonances In a Photonic Crystal Nanocavitymentioning

confidence: 99%

Localized Guided-Mode and Cavity-Mode Double Resonance in Photonic Crystal Nanocavities

et al. 2015

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“…More recent works took advantages of the Silicon-On-Insulator (SOI) platform to couple s-SWNT PL to suspended photonic crystal cavities [17,18], or silicon microdisk resonators [19]. An advantage of this approach is the integration with silicon photonics technology, even if it remains challenging to efficiently couple these structures with waveguides.…”

Section: Introductionmentioning

confidence: 99%

Controlling carbon nanotube photoluminescence using silicon microring resonators

Noury¹,

Roux²,

Vivien³

et al. 2014

Nanotechnology

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Abstract. We report on coupling between semiconducting single-wall carbon nanotubes (s-SWNT) photoluminescence and silicon microring resonators. Polyfluorene extracted s-SWNT deposited on such resonators exhibit sharp emission peaks, due to interaction with the cavity modes of the microring resonators. Ring resonators with radius of 5 µm and 10 µm were used, reaching quality factors up to 4000 in emission.

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“…48,49 Active experimental studies of trions have led to the observation of an exciton complex, a biexciton state in nanotubes, 52,53 and encourage further studies of trion states in atomic monolayer materials such as MoSe 2 and MoS 2 . 54,55 Moreover, considerable experimental efforts have been devoted to improve the luminescence quantum yield of semiconducting SWCNTs by coupling them to photonic crystal cavities, 56,57 applying electric fields, 58 and introducing luminescent local defects. 59,60 Similar to the case of quantum dot nanocrystals, [61][62][63] a deep understanding of trion states is essential for development of photonic and optoelectronic devices based on SWCNTs.…”

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Review—Photophysics of Trions in Single-Walled Carbon Nanotubes

Nishihara¹,

Okano²,

Yamada³

et al. 2017

ECS J. Solid State Sci. Technol.

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The photophysics of trions in single-walled carbon nanotubes (SWCNTs) is reviewed briefly. The trion state is observed energetically below the exciton state in hole-doped SWCNTs, and shows a simple single-exponential decay. The decay dynamics of trions depends on the photoexcitation condition. The optical responses of trions can be discussed by considering the energy relaxation of the optically accessible trion state. Detailed studies of excitons, trions, and biexcitons provide a deep understanding of the material properties of SWCNTs and are required for the design of photonic devices based on SWCNTs. 3,4 which has led to accelerated experimental studies on various optical properties of SWCNTs. Electrons and holes are strongly spatially confined to diameters on the order of 1 nm, resulting in room temperature stable excitons with large binding energies in the range of 200-400 meV.5-11 The exciton dynamics thus dominates the optical properties of semiconducting SWCNTs. 5,6 High-quality carbon nanomaterials provide an excellent experimental stage for studies on photophysics of excitons and exciton complexes.The exciton structures in SWCNTs are complicated due to the intrinsic properties of graphene, their unique helical structures, and coulomb interactions. 5 The origin of the optical absorption and PL is ascribed to the dipole-allowed (bright) exciton states, and their dynamics are affected by the interplay with the dipole-forbidden (dark) exciton states. Single nanotube spectroscopy has revealed details of the intrinsic exciton properties. For example, magneto-optical studies showed that the even-parity singlet dark exciton state is located energetically below the bright exciton state.12,13 Thermalization between the bright and dark exciton states determines the temperaturedependent PL properties 12,13 and the exciton diffusion length. 14,15 Furthermore, strong spatial confinement accentuates the exciton-exciton and exciton-electron interactions. Time-resolved transient absorption (TA) and PL spectroscopy measurements have revealed that multiple exciton states show rapid decays due to nonradiative Auger recombination. [16][17][18][19] Nonradiative Auger recombination, which competes with exciton diffusion, determines the PL efficiency of semiconducting SWCNTs, [20][21][22][23][24] and it ensures nonclassical PL by preventing the occupation of identical exciton states. 25Carrier doping is one of the most important techniques in semiconductors, which controls their electrical and optical properties. In SWCNTs, carrier doping has been actively studied using chemical modification [26][27][28][29][30][31][32][33][34][35][36][37] 47 Under strong photoexcitation conditions, dissociated carriers resulting from Auger recombination can create trion states with a subsequent absorbed photon. 43 Positive and negative trion states show almost the same binding energies. 46 Time-resolved TA and PL measurements have revealed fast formation of the trion state through the exciton-hole interaction. 48,49 Active experimental stud...

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Enhancement of carbon nanotube photoluminescence by photonic crystal nanocavities

Cited by 59 publications

References 30 publications

Localized Guided-Mode and Cavity-Mode Double Resonance in Photonic Crystal Nanocavities

Localized Guided-Mode and Cavity-Mode Double Resonance in Photonic Crystal Nanocavities

Controlling carbon nanotube photoluminescence using silicon microring resonators

Review—Photophysics of Trions in Single-Walled Carbon Nanotubes

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