Single photon source based on transmitters with selectively distributed frequencies
View Patent ↗Apparatus for single photon source based on emitters with frequencies distributed in a chosen manner. In one embodiment, the apparatus comprises an opto-electronic component capable or emitting light pulses containing a single photon comprising a resonant optical cavity and a group of photon emitters placed in this optical cavity, a single one of these emitters having an emission frequency equal to approximately the resonant frequency of the cavity characterised in that all emitters have a spectral distribution with a concentration of emitter frequencies at a given frequency, and in that the cavity is made so that its resonant frequency is different from this concentration frequency so that the number of emitters with an emission frequency corresponding to the resonant frequency of the cavity is close to one.
1. Opto-electronic component capable of emitting light pulses containing a single photon, opto-electronic comprising:
a resonant optics cavity ( 100 ) and a group of photon emitters ( 250 ) placed in this optical cavity ( 100 ), a single one of these emitters ( 250 ) having an emission frequency equal to approximately the resonant frequency (M) of the cavity ( 100 ), wherein all emitters have a spectral distribution with a concentration of frequencies of emitters ( 250 ) at a given frequency (P), and wherein the cavity ( 100 ) is made so that its resonant frequency (M) is sufficiently different from this concentration frequency (P) so that the number of emitters ( 250 ) with an emission frequency corresponding to the resonant frequency (M) of the cavity ( 100 ) is close to one.
2. Component according to claim 1 , characterised in that the emitters ( 250 ) are generated from one or more semiconductor materials.
3. Component according to claim 2 , wherein the emitters ( 250 ) are semiconducting quantum boxes.
4. Component according to claim 3 , wherein the quantum boxes are made of In x Ga 1-x As, where x is between 0.5 and 1.
5. Component according to claim 4 , wherein the cavity is composed of a Ga y Al 1-y As layer, where y is between 0.5 and 1.
6. Component according to claims 4 and 5 in combination, wherein x=1 and y=1.
7. Component according to claim 1 , wherein component's mode spectral density of the emitters ( 250 ) at the frequency of the cavity mode (M) is close to 0.5 emitters for the width of the cavity mode (M).
8. Component according to claim 1 , wherein the component includes means of adjusting emission frequencies of emitters such that the frequency of a single emitter corresponds to the resonant frequency of the cavity.
9. Component according to claim 1 , wherein the component includes a means ( 750 ) of filtering the photon(s) emitted at the frequency of the cavity mode (M) from photons of emitters not coupled to the cavity mode.
10. Component according to claim 1 , wherein the component includes optical or electrical impulse pumping means ( 400 , 500 , 600 , 900 ) of the emitters ( 250 ).
11. Component according to claim 1 , wherein the component includes means ( 700 ) of collecting the emitted single photon pulses.
12. Component according to any one of claims 1 to 11 in combination with claim 3 , wherein the quantum boxes are made of In x Ga 1-x N, where x is between 0 and 1.