Observation of two-photon absorption at low power levels using tapered optical fibers in rubidium vapor

Abstract

Nonlinear optical effects can be enhanced in tapered optical fibers with diameters less than the wavelength of the propagating light. Here we report on the observation of two-photon absorption using tapered fibers in rubidium vapor at power levels of less than 150 nW. Transit-time broadening produces two-photon absorption spectra with sharp peaks that are very different from conventional line shapes.

4 pages, 6 figures

References in corpus (5)

• All-optical switching in rubidium vapor
• Absolute absorption on the rubidium D lines: comparison between theory and experiment
• Zeno logic gates using micro-cavities
• Analysis of Enhanced Two-Photon Absorption in Tapered Optical Fibers
• Single Photon Source Using Laser Pulses and Two-Photon Absorption

Cited by in corpus (18)

• Demonstration of a memory for tightly guided light in an optical nanofiber
• Evanescent light-matter Interactions in Atomic Cladding Wave Guides
• Observation of the ${}^{87}$Rb $5S_{1/2}$ to $4D_{3/2}$ electric quadrupole transition at 516.6 nm mediated via an optical nanofibre
• Quantum-Enhanced Two-Photon Spectroscopy Using Two-mode Squeezed Light
• Fabrication of Optical Nanofibre-Based Cavities using Focussed Ion-Beam Milling -- A Review
• Generation of broadband spontaneous parametric fluorescence using multiple bulk nonlinear crystals
• Laser-written vapor cells for chip-scale atomic sensing and spectroscopy
• Complete polarization control for a nanofiber waveguide using directional coupling
• Chiral light-matter interactions in hot vapor cladded waveguides
• Saturation of atomic transitions using sub-wavelength diameter tapered optical fibers in rubidium vapor
• Dipole force free optical control and cooling of nanofiber trapped atoms
• Integrating two-photon nonlinear spectroscopy of rubidium atoms with silicon photonics
• Spin selection rule for {\it S} level transitions in atomic rubidium under paraxial and nonparaxial two-photon excitation
• Broadband Quantum Memory in Atomic Ensembles
• Saturated absorption at nanowatt power levels using metastable xenon in a high-finesse optical cavity
• Enhancement of broadband entangled two-photon absorption by resonant spectral phase flips
• Fast, low-loss all-optical phase modulation in warm rubidium vapour
• Super-extended nanofiber-guided field for coherent interaction with hot atoms