Back to results
US 2024/0069261 A1Published application
Suppression of excitation field for quantum light emitters using optical interferometers
AssigneePhotonic Inc.
InventorsYoun Seok Lee, Gary Wolfowicz, Mohsen Keshavarz Akhlaghi
Life of this patent
Estimating the term…
Abstract
Excitation used to produce luminescence is cancelled using interference with an excitation cancelling beam by controlling or setting a phase difference. An excitation beam and an excitation cancelling beam are produced from a common source and the excitation beam directed quantum light emitter to produce luminescence. A residual excitation beam and the excitation cancelling beam are coupled to interfere destructively so that the luminescence is available for detection or otherwise without substantial portions of the excitation beam.
Claims32
A method, comprising:
- directing an excitation beam to a luminescent emitter to produce luminescence;
- combining a residual excitation beam and the luminescence with an excitation cancelling beam;
- and
- setting amplitudes and a relative phase of the residual excitation beam and the excitation cancelling beam so that the residual excitation beam and the excitation cancelling beam interfere destructively on a propagation path associated with the luminescence.
1 more element
An optical system, comprising:
- a laser;
- at least one beam splitter situated to receive a source beam produced by the laser and split the source beam into an excitation beam and an excitation cancelling beam;
- a luminescent emitter situated to receive the excitation beam and produce a luminescence beam in response to the excitation beam, wherein the at least one beam splitter combines a residual excitation beam, the excitation cancelling beam, and the luminescence beam so that the residual excitation beam and the excitation cancelling beam interfere destructively;
- and
- a detector situated to receive the luminescence beam without the residual excitation beam and the excitation cancelling beam.
2 more elements
An optical waveguide system, comprising:
- a first waveguide beam splitter situated to receive a source beam and produce a first excitation beam and a first excitation cancelling beam and direct the first excitation beam and the first excitation cancelling beam along an excitation waveguide and an excitation cancelling waveguide respectively;
- a quantum emitter situated to receive the first excitation beam along an excitation waveguide resulting in luminescence and a residual excitation beam;
- a second waveguide beam splitter situated to receive and combine the first excitation cancelling beam from the excitation cancelling waveguide and a residual excitation beam and the luminescence from the excitation waveguide, wherein the residual excitation beam and the first excitation cancelling beam interfere destructively at the second waveguide beam splitter;
- and
- a third waveguide beam splitter optically coupled to the first waveguide beam splitter and the second waveguide beam splitter to receive luminescence directed by the quantum emitter to the first waveguide beam splitter along a first waveguide optical path and luminescence received by the second waveguide beam splitter along a second waveguide optical path.
2 more elements
A quantum light source, comprising;
- an optical resonator;
- a luminescent material situated in the optical resonator, wherein the optical resonator has a resonance wavelength corresponding to a luminescent emission wavelength of the luminescent material;
- a beam source operable to produce an excitation beam and an excitation cancelling beam;
- and
- an interferometer defining a first optical path and a second optical path, wherein the excitation beam is coupled to the first optical path and the excitation cancelling beam is directed to the second optical path, wherein the optical resonator and the luminescent material are situated in the first optical path so that luminescence is produced in response to the excitation beam, and the first optical path and the second optical path are defined so that the excitation cancelling beam;
- and a residual excitation beam cancel and the luminescence is directed out of the interferometer to propagate without substantial portions of the excitation cancelling beam or the residual excitation beam.
3 more elements
A method, comprising:
- splitting a source beam into an excitation beam and an excitation cancelling beam;
- directing the excitation beam to a first resonator;
- and
- combining a portion of the excitation cancelling beam and a portion of the excitation beam from the first resonator to produce destructive interference.
1 more element
Dependencies are inferred from the claim text.