Trapping Efficiency (High Refractive Index) — Geometrical Optics

This video shows the trapping efficiencies as a function of the incident angle for a ray impinging on a spherical particle (glass, refractive index: n_p = 1.50) in water (n_m = 1.33). On the right side the scattering process as a function of the incident angle is represented, on the left side the calculated scattering, gradient and total trapping efficiency.

Agnese Callegari, Mite Mijalkov, A. Burak Gököz, and Giovanni Volpe, “Computational toolbox for optical tweezers in geometrical optics,” J. Opt. Soc. Am. B 32, B11-B19 (2015).
http://dx.doi.org/10.1364/JOSAB.32.000B11

Geometrical Optics — Brownian Motion in an Optical Trap (low NA) — Brownian motion in an optical trap (low NA).

Geometrical Optics — Brownian Motion in an Optical Trap (Medium NA) — Brownian motion in an optical trap (medium NA).

Geometrical Optics — Brownian Motion in an Optical Trap (High NA) — Brownian motion in an optical trap (high NA).

Geometrical Optics — Ray on Sphere (High Refractive Index) — Scattering of a ray on a spherical particle (high refractive index).

Geometrical Optics — Ray on Sphere (Low Refractive Index) — Scattering of a ray on a spherical particle (low refractive index).

Geometrical Optics — Trapping Efficiency (High Refractive Index) — Trapping efficiencies (high refractive index).

Geometrical Optics — Trapping Efficiency (Low Refractive Index) — Trapping efficiencies (low refractive index).

Geometrical Optics — Ellipsoidal Particle — Alignment for a prolate ellipsoidal particle.

Geometrical Optics — Kramers transitions — Kramers’ transitions in a double optical trap.

Geometrical Optics — Transversal optical trapping NA=0.50 nm=1.33 np=1.50 — Transversal optical trapping: NA=0.50 nm=1.33 np=1.50.

Geometrical Optics — Transversal optical trapping NA=1.00 nm=1.33 np=1.50 — Transversal optical trapping: NA=1.00 nm=1.33 np=1.50.

Geometrical Optics — Transversal optical trapping NA=1.30 nm=1.33 np=1.50 — Transversal optical trapping: NA=1.30 nm=1.33 np=1.50.

Geometrical Optics — Axial optical trapping NA=0.50 nm=1.33 np=1.50 — Axial optical trapping: NA=0.50 nm=1.33 np=1.50.

Geometrical Optics — Axial optical trapping NA=1.00 nm=1.33 np=1.50 — Axial optical trapping: NA=1.00 nm=1.33 np=1.50.

Geometrical Optics — Axial optical trapping NA=1.30 nm=1.33 np=1.50 — Transversal optical trapping: NA=1.30 nm=1.33 np=1.50.

Geometrical Optics — Transversal optical trapping NA=0.50 nm=1.33 np=1.00 — Transversal optical trapping: NA=0.50 nm=1.33 np=1.00.

Geometrical Optics — Transversal optical trapping NA=1.00 nm=1.33 np=1.00 — Transversal optical trapping: NA=1.00 nm=1.33 np=1.00.

Geometrical Optics — Transversal optical trapping NA=1.30 nm=1.33 np=1.00 — Transversal optical trapping: NA=1.30 nm=1.33 np=1.00.

Geometrical Optics — Axial optical trapping NA=0.50 nm=1.33 np=1.00 — Axial optical trapping: NA=0.50 nm=1.33 np=1.00.

Geometrical Optics — Axial optical trapping NA=1.00 nm=1.33 np=1.00 — Axial optical trapping: NA=1.00 nm=1.33 np=1.00.

Geometrical Optics — Axial optical trapping NA=1.30 nm=1.33 np=1.00 — Axial optical trapping: NA=1.30 nm=1.33 np=1.00.

Geometrical Optics — Transversal optical trapping NA=0.50 nm=1.60 np=1.00 — Axial optical trapping: NA=0.50 nm=1.60 np=1.00.

Geometrical Optics — Transversal optical trapping NA=1.00 nm=1.60 np=1.00 — Transversal optical trapping: NA=1.00 nm=1.60 np=1.00.

Geometrical Optics — Transversal optical trapping NA=1.30 nm=1.60 np=1.00 — Transversal optical trapping: NA=1.30 nm=1.60 np=1.00.

Geometrical Optics — Axial optical trapping NA=0.50 nm=1.60 np=1.00 — Transversal optical trapping: NA=0.50 nm=1.60 np=1.00.

Geometrical Optics — Axial optical trapping NA=1.00 nm=1.60 np=1.00 — Axial optical trapping: NA=1.00 nm=1.60 np=1.00.

Geometrical Optics — Axial optical trapping NA=1.30 nm=1.60 np=1.00 — Axial optical trapping – NA=1.30 nm=1.60 np=1.00.