Information storage device and method based on Rydberg atom antenna

Abstract

The invention discloses an information storage device and method based on a Rydberg atom antenna. Through superposition of two beams of coupled light, a vector interference field is generated in an atomic gas chamber of the Rydberg atomic antenna, detection light pulses are stored based on a nonlinear optical process, and an information storage function is realized on the basis of a quantum precision measurement function of the Rydberg atomic antenna. Compared with a traditional Rydberg atom antenna only having a detection function, the Rydberg atom antenna has the advantages that radio information can be stored while radio signals are detected by introducing a vector interference field; in addition, the information storage device based on the Rydberg atom antenna detects and stores radio information by using an all-optical means, and can realize rapid access of information.

Description

Technical Field

[0001] The present invention relates to the field of quantum sensing and communication, and in particular to an information storage device and method based on a Rydberg atomic antenna. Background Art

[0002] Quantum precision measurement technology based on Rydberg atoms has the characteristics of small device size, ultra-wideband response, and high sensitivity, and is an important part of the new generation of information technology. Therefore, the precise detection of radio signals through Rydberg atom antennas has received extensive attention and research, and has important application prospects in the fields of communications, remote sensing, and target detection.

[0003] However, the Rydberg atomic antennas currently under study generally do not have the function of information storage, which hinders the development and practical application of Rydberg atomic antennas. Therefore, there is an urgent need to develop Rydberg quantum precision measurement technology that can store information. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides an information storage device and method based on a Rydberg atomic antenna, which is used to realize storable quantum precision measurement of radio signals.

[0005] To achieve the above object, the present invention adopts the following scheme:

[0006] The present invention provides an information storage device based on a Rydberg atomic antenna, comprising: a detection light laser, a first dichroic mirror, an atomic gas chamber, a second dichroic mirror, a photodetector, a computer, a coupling light laser, a first half-wave plate, a first polarization beam splitter, a first light processing optical path, and a second light processing optical path, wherein the detection light laser generates a beam of detection light, which is sequentially reflected by the first dichroic mirror, then passes through the atomic gas chamber, is reflected by the second dichroic mirror, and reaches the photodetector; the coupling light laser generates a beam of coupling light, which passes through the first half-wave plate, and is then reflected by the second dichroic mirror. The first polarization beam splitter is divided into a first coupling light and a second coupling light. The first coupling light generates a radially polarized vector light beam after passing through the first light processing optical path, and passes through the atomic gas chamber after being transmitted through the second dichroic mirror; the second coupling light generates an angularly polarized vector light beam after passing through the second light processing optical path, and passes through the atomic gas chamber from the opposite side to the penetration direction of the first coupling light after being transmitted through the first dichroic mirror; the first coupling light and the second coupling light overlap with the detection light in the atomic gas chamber, and the two coupling light beams are superimposed to generate a vector interference field, and the photodetector is connected to a computer.

[0007] In some embodiments, the first light processing optical path includes a second half-wave plate, a first q-plate and a second polarization beam splitter, and the first coupled light passes through the second half-wave plate and the first q-plate in sequence, is reflected by the second polarization beam splitter, and then passes through the atomic gas chamber after being transmitted through the second dichroic mirror.

[0008] In some embodiments, the second light processing optical path includes a third half-wave plate, a reflector, a second q-plate and a third polarization beam splitter. After the second coupled light passes through the third half-wave plate, it is reflected by the reflector, then passes through the second q-plate, is reflected by the third polarization beam splitter, and passes through the atomic gas chamber after being transmitted through the first dichroic mirror.

[0009] In some embodiments, the atomic gas cell encapsulates cesium atomic vapor.

[0010] The present invention also provides an information storage method based on a Rydberg atomic antenna, based on the above-mentioned information storage device based on a Rydberg atomic antenna, comprising the following steps:

[0011] S1: the detection light laser emits detection light, which is pulsed light;

[0012] S2: the detection light is reflected by the first dichroic mirror and then incident into the atomic gas chamber;

[0013] S3: The atomic gas chamber encapsulates cesium atoms, and the detection light excites the atoms from a ground state to an intermediate state in the atomic gas chamber;

[0014] S4: After the detection light is emitted from the atomic gas chamber, it is reflected by the second dichroic mirror and then incident on the probe of the photodetector;

[0015] S5: the coupling light laser emits coupling light;

[0016] S6: using the second half-wave plate to adjust the linear polarization direction of the first coupled light, and then using the first q-plate to generate a radially polarized vector light beam;

[0017] S7: the first coupling light continues to pass through the second polarization beam splitter, changes the transmission path, and is incident into the atomic gas chamber after being transmitted through the second dichroic mirror;

[0018] S8: using the third half-wave plate and the reflector to sequentially change the linear polarization direction and the transmission path of the second coupled light;

[0019] S9: using the second q-plate to generate an angularly polarized vector light beam, and then using the third polarization beam splitter to reflect and the first dichroic mirror to project the second coupled light into the atomic gas chamber;

[0020] S10: the first and second coupling lights coincide with the detection light in the atomic gas chamber, and the two coupling lights are superimposed to generate a vector interference field;

[0021] S11: The vector interference field excites the atoms from the intermediate state to the Rydberg state, inducing the Rydberg atomic electromagnetically induced transparency effect;

[0022] S12: When a radio signal acts on the Rydberg atomic antenna, the detection light pulse carrying the radio information is converted into atomic excitation with local electromagnetic energy by opening a vector interference field, and then the radio information is stored in the atomic gas chamber. At this time, the photodetector cannot read the radio information;

[0023] S13: After the first coupling light is turned off, the detection light is reflected by the second dichroic mirror and incident on the probe of the photodetector. The photodetector can be used to obtain the Rydberg electromagnetic induction transparent signal, and then read the radio information stored in the atomic antenna.

[0024] In some embodiments, the first half-wave plate is used to adjust the linear polarization direction of the coupled light, thereby adjusting the light intensity ratio of the first and second coupled lights.

[0025] The beneficial effects of the present invention are:

[0026] (1) The existing Rydberg atomic antenna does not have the function of information storage. By introducing the vector interference field generated by the superposition of two coherent coupled light beams, it can store radio information while detecting radio signals.

[0027] (2) The information storage device based on the Rydberg atomic antenna uses all-optical means to detect and store radio information, which can achieve rapid access to information. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of an information storage device based on a Rydberg atomic antenna;

[0029] Figure 2 Schematic diagram of the Rydberg energy levels of an atom;

[0030] Figure 3 Schematic diagram of radially and angularly polarized vector beams.

[0031] In the figure: 1. detection light laser; 2. first dichroic mirror; 3. atomic gas chamber; 4. second dichroic mirror; 5. photodetector; 6. computer; 7. coupled light laser; 8. first half-wave plate; 9. first polarization beam splitter; 10. second half-wave plate; 11. first q-plate; 12. second polarization beam splitter; 13. third half-wave plate; 14. reflector; 15. second q-plate; 16. third polarization beam splitter. DETAILED DESCRIPTION

[0032] In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be fully described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] The present invention provides an information storage device based on a Rydberg atomic antenna, comprising: a detection light laser, a first dichroic mirror, an atomic gas chamber, a second dichroic mirror, a photodetector, a computer, a coupling light laser, a first half-wave plate, a first polarization beam splitter, a first light processing optical path, and a second light processing optical path, wherein the detection light laser generates a beam of detection light, which is sequentially reflected by the first dichroic mirror, then passes through the atomic gas chamber, is reflected by the second dichroic mirror, and reaches the photodetector; the coupling light laser generates a beam of coupling light, which passes through the first half-wave plate, and is then reflected by the second dichroic mirror. The first polarization beam splitter is divided into a first coupling light and a second coupling light. The first coupling light generates a radially polarized vector light beam after passing through the first light processing optical path, and passes through the atomic gas chamber after being transmitted through the second dichroic mirror; the second coupling light generates an angularly polarized vector light beam after passing through the second light processing optical path, and passes through the atomic gas chamber from the opposite side to the penetration direction of the first coupling light after being transmitted through the first dichroic mirror; the first coupling light and the second coupling light overlap with the detection light in the atomic gas chamber, and the two coupling light beams are superimposed to generate a vector interference field, and the photodetector is connected to a computer.

[0035] In some embodiments, the first light processing optical path includes a second half-wave plate, a first q-plate and a second polarization beam splitter, and the first coupled light passes through the second half-wave plate and the first q-plate in sequence, is reflected by the second polarization beam splitter, and then passes through the atomic gas chamber after being transmitted through the second dichroic mirror.

[0036] In some embodiments, the second light processing optical path includes a third half-wave plate, a reflector, a second q-plate and a third polarization beam splitter. After the second coupled light passes through the third half-wave plate, it is reflected by the reflector, then passes through the second q-plate, is reflected by the third polarization beam splitter, and passes through the atomic gas chamber after being transmitted through the first dichroic mirror.

[0037] The following is a specific implementation example. In some embodiments, Figure 1As shown, it includes: a detection light laser 1, a first dichroic mirror 2, an atomic gas chamber 3, a second dichroic mirror 4, a photodetector 5, a computer 6, a coupled light laser 7, a first half-wave plate 8, a first polarization beam splitter 9, a second half-wave plate 10, a first q-plate 11, a second polarization beam splitter 12, a third half-wave plate 13, a reflector 14, a second q-plate 15, and a third polarization beam splitter 16; the detection light laser, the first dichroic mirror, the atomic gas chamber, the second dichroic mirror, and the photodetector are sequentially arranged along the detection light; the coupled light laser, the first half-wave plate, and the first polarization beam splitter are sequentially arranged along the coupled light, and the first polarization beam splitter divides the coupled light into the first coupled light and the second coupled light; the second half-wave plate, the first q-plate, the second polarization beam splitter, the second dichroic mirror, and the atomic gas chamber are sequentially arranged along the first coupled light; the third half-wave plate, the reflector, the second q-plate, the third polarization beam splitter, the first dichroic mirror, and the atomic gas chamber are sequentially arranged along the second coupled light; the photodetector is connected to the computer.

[0038] The detection light laser is used to emit detection light, which is pulsed light; the first dichroic mirror is used to reflect the detection light and transmit the coupling light, so that the detection light is incident into the atomic gas chamber; the atomic gas chamber encapsulates cesium atoms, and the detection light excites the atoms from the ground state to the intermediate state (such as Figure 2 The second dichroic mirror is used to reflect the detection light and transmit the coupling light, so that the detection light is incident on the probe of the photodetector; the coupling light laser is used to emit the coupling light; the first half-wave plate is used to adjust the linear polarization direction of the coupling light, and then adjust the light intensity ratio of the first and second coupling lights; the second half-wave plate is used to adjust the linear polarization direction of the first coupling light, and then the first q-plate is used to generate a radially polarized vector beam (as shown in FIG. Figure 3 The second polarization beam splitter is used to change the transmission path of the first coupling light so that the first coupling light is incident into the atomic gas chamber; the third half-wave plate and the reflector are used to sequentially change the linear polarization direction and transmission path of the second coupling light; the second q-plate is used to generate an angularly polarized vector beam (such as Figure 3 As shown), the third polarization beam splitter is then used to make the second coupling light incident into the atomic gas chamber; the first and second coupling lights coincide with the detection light in the atomic gas chamber, and the two coupling lights are superimposed to generate a vector interference field; the vector interference field excites the atom from the intermediate state to the Rydberg state (as shown Figure 2As shown in the figure), the Rydberg electromagnetically induced transparency effect is induced; when a radio signal acts on the Rydberg atomic antenna, the detection light pulse carrying the radio information can be converted into atomic excitation with local electromagnetic energy by opening a vector interference field, and then the radio information is stored in the atomic gas chamber; when the first coupling light is turned off, the atomic excitation is converted into a detection light pulse, and its transmission direction is the same as that of the second coupling light. The Rydberg electromagnetically induced transparency signal can be obtained by using a photodetector, and then the radio information stored in the atomic antenna can be read.

[0039] In some embodiments, the present invention further provides an information storage method based on a Rydberg atomic antenna, based on the above-mentioned information storage device based on a Rydberg atomic antenna, comprising the following steps:

[0040] S1: the detection light laser emits detection light, which is pulsed light;

[0041] S2: the detection light is reflected by the first dichroic mirror and then incident into the atomic gas chamber;

[0042] S3: The atomic gas chamber encapsulates cesium atoms, and the detection light excites the atoms from a ground state to an intermediate state in the atomic gas chamber;

[0043] S4: After the detection light is emitted from the atomic gas chamber, it is reflected by the second dichroic mirror and then incident on the probe of the photodetector;

[0044] S5: the coupling light laser emits coupling light;

[0045] S6: using the second half-wave plate to adjust the linear polarization direction of the first coupled light, and then using the first q-plate to generate a radially polarized vector light beam;

[0046] S7: the first coupling light continues to pass through the second polarization beam splitter, changes the transmission path, and is incident into the atomic gas chamber after being transmitted through the second dichroic mirror;

[0047] S8: using the third half-wave plate and the reflector to sequentially change the linear polarization direction and the transmission path of the second coupled light;

[0048] S9: using the second q-plate to generate an angularly polarized vector light beam, and then using the third polarization beam splitter to reflect and the first dichroic mirror to project the second coupled light into the atomic gas chamber;

[0049] S10: the first and second coupling lights coincide with the detection light in the atomic gas chamber, and the two coupling lights are superimposed to generate a vector interference field;

[0050] S11: The vector interference field excites the atoms from the intermediate state to the Rydberg state, inducing the Rydberg atomic electromagnetically induced transparency effect;

[0051] S12: When a radio signal acts on the Rydberg atomic antenna, the detection light pulse carrying the radio information is converted into atomic excitation with local electromagnetic energy by opening a vector interference field, and then the radio information is stored in the atomic gas chamber. At this time, the photodetector cannot read the radio information;

[0052] S13: After the first coupling light is turned off, the detection light is reflected by the second dichroic mirror and incident on the probe of the photodetector. The photodetector can be used to obtain the Rydberg electromagnetic induction transparent signal, and then read the radio information stored in the atomic antenna.

[0053] In some embodiments, the first half-wave plate is used to adjust the linear polarization direction of the coupled light, thereby adjusting the light intensity ratio of the first and second coupled lights.

[0054] In the description of this specification, reference to the terms "one embodiment" and "example" means that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the combination in a suitable manner in the relative embodiment or example.

[0055] It must be pointed out that the description of the above embodiments is not intended to be limiting but only to help understand the core idea of ​​the present invention. For ordinary technicians in this technical field, any improvements to the present invention and alternatives equivalent to the product, without departing from the principles of the present invention, also fall within the scope of protection of the claims of the present invention.

Claims

1. An information storage device based on a Rydberg atomic antenna, characterized in that: include: A detection light laser, a first dichroic mirror, an atomic gas chamber, a second dichroic mirror, a photodetector, a computer, a coupling light laser, a first half-wave plate, a first polarization beam splitter, a first light processing optical path, and a second light processing optical path, wherein the detection light laser generates a beam of detection light, which is reflected by the first dichroic mirror in sequence, then passes through the atomic gas chamber, is reflected by the second dichroic mirror, and reaches the photodetector; the coupling light laser generates a beam of coupling light, which is divided into a first coupling light and a second coupling light by the first polarization beam splitter after passing through the first half-wave plate, the first coupling light generates a radially polarized vector light beam after passing through the first light processing optical path, and passes through the atomic gas chamber after being transmitted by the second dichroic mirror; the second coupling light generates an angularly polarized vector light beam after passing through the second light processing optical path, and passes through the atomic gas chamber from the opposite side to the penetration direction of the first coupling light after being transmitted by the first dichroic mirror; the first coupling light and the second coupling light overlap with the detection light in the atomic gas chamber, and the two coupling light beams are superimposed to generate a vector interference field, and the photodetector is connected to the computer.

2. The information storage device based on the Rydberg atomic antenna according to claim 1, characterized in that: The first light processing optical path includes a second half-wave plate, a first q-plate and a second polarization beam splitter. The first coupled light passes through the second half-wave plate and the first q-plate in sequence, is reflected by the second polarization beam splitter, and then passes through the atomic gas chamber after being transmitted through the second dichroic mirror.

3. The information storage device based on Rydberg atomic antenna according to claim 2, characterized in that: The second light processing optical path includes a third half-wave plate, a reflector, a second q-plate and a third polarization beam splitter. After the second coupling light passes through the third half-wave plate, it is reflected by the reflector, then passes through the second q-plate, is reflected by the third polarization beam splitter, is transmitted through the first dichroic mirror, and then passes through the atomic gas chamber.

4. The information storage device based on Rydberg atomic antenna according to claim 1, characterized in that: The atomic gas cell encapsulates cesium atomic vapor.

5. An information storage method based on Rydberg atomic antenna, characterized in that: The information storage device based on the Rydberg atomic antenna according to claim 3 comprises the following steps: S1: the detection light laser emits detection light, which is pulsed light; S2: the detection light is reflected by the first dichroic mirror and then incident into the atomic gas chamber; S3: The atomic gas chamber encapsulates cesium atoms, and the detection light excites the atoms from a ground state to an intermediate state in the atomic gas chamber; S4: After the detection light is emitted from the atomic gas chamber, it is reflected by the second dichroic mirror and then incident on the probe of the photodetector; S5: the coupling light laser emits coupling light; S6: using the second half-wave plate to adjust the linear polarization direction of the first coupled light, and then using the first q-plate to generate a radially polarized vector light beam; S7: the first coupling light continues to pass through the second polarization beam splitter, changes the transmission path, and is incident into the atomic gas chamber after being transmitted through the second dichroic mirror; S8: using the third half-wave plate and the reflector to sequentially change the linear polarization direction and the transmission path of the second coupled light; S9: using the second q-plate to generate an angularly polarized vector light beam, and then using the third polarization beam splitter to reflect and the first dichroic mirror to project the second coupled light into the atomic gas chamber; S10: the first and second coupling lights coincide with the detection light in the atomic gas chamber, and the two coupling lights are superimposed to generate a vector interference field; S11: The vector interference field excites the atoms from the intermediate state to the Rydberg state, inducing the Rydberg atomic electromagnetically induced transparency effect; S12: When a radio signal acts on the Rydberg atomic antenna, the detection light pulse carrying the radio information is converted into atomic excitation with local electromagnetic energy by opening a vector interference field, and then the radio information is stored in the atomic gas chamber. At this time, the photodetector cannot read the radio information; S13: After the first coupling light is turned off, the detection light is reflected by the second dichroic mirror and incident on the probe of the photodetector. The photodetector can be used to obtain the Rydberg electromagnetic induction transparent signal, and then read the radio information stored in the atomic antenna.

6. The method according to claim 5, characterized in that The first half-wave plate is used to adjust the linear polarization direction of the coupled light, thereby adjusting the light intensity ratio of the first and second coupled lights.

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