Optical absorption by atomically doped carbon nanotubes

2 5 Ja n 20 05 Near - field Electrodynamics of Atomically Doped Carbon Nanotubes ∗

We develop a quantum theory of near-field electrodynamical properties of carbon nanotubes and investigate spontaneous decay dynamics of excited states and van der Waals attraction of the ground state of an atomic system close to a single-wall nanotube surface. Atomic spontaneous decay exhibits vacuum-field Rabi oscillations – a principal signature of strong atomvacuum-field coupling. The strong...

Optical Absorption Properties of Single-Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWNTs) are 1 dimensional (1D) tubular material with sp bonded graphene wall. Their unique geometry gives rise to sharp divergences in electronic density of states and consequently leads to characteristic discrete energy subbands. Since these inter-subband energy corresponds to near infrared (NIR) to visible (vis) range, many innovative optical application of SWNT...

Optical limiting and enhanced optical nonlinearity in boron-doped carbon nanotubes

The optical limiting characteristics of pure and boron-doped multi-walled carbon nanotubes (MWNTs) are studied and compared at wavelengths of 532 and 1064 nm. Fluence-dependent transmission and Z-scan measurements using 8 ns pulses show that the boron-doped MWNT suspensions exhibit a stronger optical nonlinearity with fluence than pure carbon nanotube suspensions in both the visible and near-in...

Fractional Flux Periodicity in doped carbon nanotubes

Weak backscattering in deflected doped carbon nanotubes.

Carbon nanotubes (CNTs) are highly sensitive towards dipole molecules, mechanical loads, interfacial contacts, chemical modifications and temperature fluctuations. Their applications are currently limited to electron-field-emission and gas-sensing devices. In fact, CNTs can also be used as strain-sensing elements; for example, variations in CNT resistance with bending strain have been character...