Polarization Tailored Light Driven Directional Optical Nanobeacon

Abstract

We experimentally demonstrate all-optical control of the emission directivity of a dipole-like nanoparticle with spinning dipole moment sitting on the interface to an optical denser medium. The particle itself is excited by a tightly focused polarization tailored light beam under normal incidence. The position dependent local polarization of the focal field allows for tuning the dipole moment via careful positioning of the particle relative to the beam axis. As an application of this scheme, we investigate the polarization dependent coupling to a planar two-dimensional dielectric waveguide.

Chiral quantum optics

“…The associated directional coupling has been observed experimentally in both dielectric [21][22][23][24][25][26][27][28][29][30][31] and plasmonic nanostructures [32][33][34][35] by coupling both classical [24-26, 30, 32-35] and quantum [21-23, 27-29, 31] emitters to the confined light fields. The robustness of the chiral points against unavoidable fabrication imperfections in photonic-crystal waveguides has been assessed [31,36] and chiral coupling is a well characterized and robust phenomenon, which is readily implementable in a range of applications.…”

“…5 a for a photonic-crystal waveguide. Directional emission has been observed experimentally with a range of different types of emitters embedded in various photonic nanostructures [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35].…”

Deterministic photon–emitter coupling in chiral photonic circuits

“…Based on our experimental demonstration, we propose an experimentally achievable and fully scalable deterministic photon-photon CNOT gate, which so far has been missing in photonic quantum-information processing where most gates are probabilistic [4]. Chiral photonic circuits will enable dissipative preparation of entangled states of multiple emitters [5], may lead to novel topological photon states [6,7], or can be applied in a classical regime to obtain highly directional photon scattering [8][9][10].Truly 1D photon-emitter interfaces are desirable for a range of applications in photonic quantum-information processing [11]. To this end, photonic-crystal waveguides constitute an ideal platform featuring on-chip integration with the ability to engineer the light-matter coupling.…”

Accurate Feeding of Nanoantenna by Singular Optics for Nanoscale Translational and Rotational Displacement Sensing

“…The singularity usually refers to the discontinuity or undefined value in the light field itself. Around these singularities of the fields, rapidly spatially varying field patterns occur, which has led to new applications such as high-precision nanoscale metrology and superresolution imaging [13,[15][16][17][18][19][20][21][22][23].In this Letter, we use two different kinds of singularities: The so-called V-point polarization singularity in an azimuthally polarized beam [24][25][26] and the phase singularity in a Hermite-Gaussian beam to precisely excite one individual element of two identical parallel metallic nanorod antennas separated by a deep subwavelength gap. The precise alignment of the singularity with the two nanorods gives an accurate feeding of them far beyond the diffraction limit.…”

“…The singularity usually refers to the discontinuity or undefined value in the light field itself. Around these singularities of the fields, rapidly spatially varying field patterns occur, which has led to new applications such as high-precision nanoscale metrology and superresolution imaging [13,[15][16][17][18][19][20][21][22][23].…”