Tunable electronic correlation effects in nanotube-light interactions

Miyauchi, Yuhei; Zhang, Zhengyi; Takekoshi, Mitsuhide; Tomio, Yuh; Suzuura, Hidekatsu; Perebeinos, Vasili; Deshpande, Vikram V.; Lu, Chenguang; Berciaud, Stéphane; Kim, Philip; Hone, James; Heinz, Tony F.

doi:10.1103/physrevb.92.205407

Cited by 13 publications

(13 citation statements)

References 73 publications

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“…5,6 SWCNTs can be characterized by absorbance peaks in the near-UV, visible, and IR spectra that are attributed to electronic transitions between energy states of semiconducting and metallic SWCNTs. 7 These unique absorption properties exited the interest in nanotubes as optoelectronic material, leading to diverse studies such as applications in solar cells; 8,9 photoluminescence for imaging and sensing; 10,11 high optical nonlinearity with fast response for optical communication systems; 12,13 optical transitions in SWCNT eldeffect transistors with electrostatic gating control; [14][15][16] photoinduced molecular desorption for gas sensing; 17,18 and terahertz wave generation and detection for exible and wearable electronics. 19 Whereas most recent studies of light-matter interactions in SWCNTs are reported on separated nanotubes, the samples require complex processing steps such as centrifugation in liquid solution.…”

Section: Introductionmentioning

confidence: 99%

Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

et al. 2019

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“…Indeed, some pioneering studies reported high-temperature radiation from carbon nanotubes under Joule-heating conditions 18 – 21 , exhibiting light emission spectra consisting of broad peaks (full-width at half-maximum (FWHM) of ~350–400 meV) 19 , 20 or no peak features at all 18 , 21 . However, the carrier doping and current injection required to heat the nanotubes modify their 1D quantum correlation effects 22 , and the origin of the peak features (whether they are band-to-band or excitonic transitions) remains debatable 19 , 20 . In addition, the possibility of competing electroluminescence mechanisms, including ambipolar carrier injection and impact excitation 18 – 21 , 23 , further complicates the interpretation of light emission phenomena during current injection.…”

Section: Introductionmentioning

confidence: 99%

Ultra-narrow-band near-infrared thermal exciton radiation in intrinsic one-dimensional semiconductors

et al. 2018

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Thermal radiation is the most primitive light emission phenomenon of materials. Broadband radiation from red-hot materials is well known as the kick-starter phenomenon of modern quantum physics in the early twentieth century; even nowadays, its artificial control plays a central role in modern science and technology. Herein, we report the fundamental thermal radiation properties of intrinsic one-dimensional semiconductors and metals, which have not been elucidated because of significant technical challenges. We observed narrow-band near-infrared radiation from semiconducting single-walled carbon nanotubes at 1000–2000 K in contrast to its broadband metallic counterpart. We confirm that the ultra-narrow-band radiation is enabled by the thermal generation of excitons that are hydrogen-like neutral exotic atoms comprising mutually bound electrons and holes. Our findings uncover the robust quantum correlations in intrinsic one-dimensional semiconductors even at 2000 K; additionally, the findings provide an opportunity for excitonic optothermal engineering toward the realization of efficient thermophotovoltaic energy harvesting.

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“…In SWCNTs, carrier doping has been actively studied using chemical modification [26][27][28][29][30][31][32][33][34][35][36][37] ing can modify the exciton dynamics through the exciton-carrier interactions. Carrier doping causes quenching of exciton absorption and PL, [26][27][28][29][30][39][40][41][42] exciton peak shifts, 36,41,42 reduction in the bandgap energy, 36 and rapid exciton decay. 28,32,35,37 In addition, a bound state, a trion (a charged exciton), is discovered energetically below the E 11 exciton state in hole-doped SWCNT samples.…”

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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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Tunable electronic correlation effects in nanotube-light interactions

Cited by 13 publications

References 73 publications

Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

Wavelength-dependent photoconductivity of single-walled carbon nanotube layers

Ultra-narrow-band near-infrared thermal exciton radiation in intrinsic one-dimensional semiconductors

Review—Photophysics of Trions in Single-Walled Carbon Nanotubes

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