Ferroelectric nanophotonic materials and devices
Systems and methods for manipulating light with tunable ferroelectric photonic devices. Devices having tunable properties that exhibit photonic bandgap behavior are fabricated from ferroelectric materials. Apparatus is provided to apply tuning signals to the ferroelectric material using one or more of electric fields, mechanical forces, optical fields, and thermal fields. Control circuitry is provided to generate the control signals needed to apply the tuning signals. Input and output ports are provided to allow input signals to be received and to provide output signals. In some cases, a feedback loop is provided to use a portion of the output signal as a diagnostic signal for control of the operation of the device within an acceptable range. It is expected that ferroelectric photonic devices operating according to principles of the invention will be useful for a wide variety of applications, including optical switching, optical modulation, optical computing, and performing logic optically.
1. A photonic bandgap light manipulation apparatus having a tunable property, comprising:
a photonic bandgap structure having a dispersion relation, said photonic bandgap structure comprising a ferroelectric material, said photonic bandgap structure having at least one of an optical input port for receiving an optical input signal and an optical output port for providing an optical output signal;
a control circuit that controls an application of a tuning signal to said ferroelectric material; and
at least one structure operatively connected to said ferroelectric material and to said control circuit, said at least one structure configured to apply said tuning signal to said ferroelectric material;
whereby said property of said photonic bandgap light manipulation apparatus is tuned to provide a manipulation of at least one of said optical input signal that is received at said apparatus at said optical input port and said optical output signal that is provided by said apparatus at said optical output port.
2. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light is a switching operation.
3. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light is a logic operation.
4. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light is a modulation of light.
5. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light is a memory operation.
6. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light is a computation operation.
7. The photonic bandgap light manipulation apparatus of claim 1 , wherein said manipulation of light involves controlling a propagation direction of a beam of light.
8. The photonic bandgap light manipulation apparatus of claim 1 , wherein said tuning signal is an electrical signal.
9. The photonic bandgap light manipulation apparatus of claim 1 , wherein said tuning signal is a mechanical force.
10. The photonic bandgap light manipulation apparatus of claim 1 , wherein said tuning signal is an optical signal.
11. The photonic bandgap light manipulation apparatus of claim 1 , wherein said tuning signal is a thermal signal.
12. The photonic bandgap light manipulation apparatus of claim 1 , wherein said at least one structure configured to apply said tuning signal to said ferroelectric material is an electrode.
13. The photonic bandgap light manipulation apparatus of claim 12 , wherein said electrode comprises a metal.
14. The photonic bandgap light manipulation apparatus of claim 12 , wherein said electrode comprises an oxide.
15. The photonic bandgap light manipulation apparatus of claim 12 , wherein said electrode comprises a carbon nanotube.
16. The photonic bandgap light manipulation apparatus of claim 12 , wherein said electrode comprises a doped semiconductor.
17. The photonic bandgap light manipulation apparatus of claim 1 , wherein said at least one structure configured to apply said tuning signal to said ferroelectric material is a mechanical device.
18. The photonic bandgap light manipulation apparatus of claim 1 , wherein said at least one structure configured to apply said tuning signal to said ferroelectric material is an optical source.
19. The photonic bandgap light manipulation apparatus of claim 1 , further comprising a feedback loop that includes a detector that receives an output signal from said apparatus and provides a signal in response to said received signal to said control circuit.
20. The photonic bandgap light manipulation apparatus of claim 1 , further comprising a power supply that provides power to at least one of said control circuit and said at least one structure configured to apply said tuning signal to said ferroelectric material.