Optomechanical non-reciprocal device

Patent metadata

Field	Value
Publication number	US-9423605-B2
Application number	US-201013202528-A
Country	US
Kind code	B2
Filing date	Feb 19, 2010
Priority date	Feb 19, 2009
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

There is set forth herein an optomechanical device which can comprise a first mirror and a second mirror forming with the first mirror a cavity. In one aspect the first mirror can be a movable mirror. The optomechanical device can be adapted so that the first mirror is moveable responsively to radiation force.

First claim

We claim:

1. An optomechanical device comprising:
a first mirror; and
a second mirror forming with the first mirror a cavity;
wherein the first mirror is a movable mirror;
wherein the optomechanical device is adapted so that the first mirror is moveable responsively to radiation force;
wherein the optomechanical device includes a mechanical stop for stopping the first mirror at a certain position to result in a certain resonance wavelength band of the cavity being defined; and
wherein the optomechanical device is operative so that light incident on the cavity in a forward direction results in a first set of radiation forces on the first mirror, and wherein the optomechanical device is further operative so that reflected light transmitted through the cavity incident on the cavity in a backward direction results in a second set of radiation forces on the first mirror, a sum of the second set of radiation forces being different from a sum of the first set of radiation forces.

2. The optomechanical device of claim 1 , wherein the first mirror is made moveable with use of mechanical suspensions.

3. The optomechanical device of claim 2 , wherein the mechanical suspensions are provided by cantilevers.

4. The optomechanical device of claim 1 , wherein the second mirror is a stationary mirror.

5. The optomechanical device of claim 1 , wherein the first mirror includes a photonic crystal.

6. The optomechanical device of claim 1 , wherein the first mirror includes a photonic crystal and wherein the second mirror includes a photonic crystal.

7. The optomechanical device of claim 1 , wherein the optomechanical device includes an in-plane device structure.

8. The optomechanical device of claim 1 , wherein the optomechanical device is configured so that the first mirror and the second mirror are provided in a common plane.

9. The optomechanical device of claim 8 , wherein the first mirror and the second mirror have respective planar structures that extend in a common plane.

10. The optomechanical device of claim 8 , wherein the first mirror and the second mirror extend in a common plane.

11. The optomechanical device of claim 8 , wherein the first mirror and the second mirror are disposed side by side and extend in a common plane.

12. The optomechanical device of claim 8 , wherein the optomechanical device defines a cavity provided as an in-plane optomechanical device having an in-plane device structure.

13. The optomechanical device of claim 1 , wherein the mechanical stop is spaced apart from the first mirror.

14. The optomechanical device of claim 1 , wherein the mechanical stop is adapted for stopping movement of the first mirror in one direction.

15. The optomechanical device of claim 1 , wherein the mechanical stop is adapted to stop movement of the first mirror in a first direction, and wherein the optomechanical device is adapted so that the first mirror is free to move in a second direction opposite the first direction without being stopped by a mechanical stop.

16. The optomechanical device of claim 1 , wherein during an initial state a resonance wavelength band of the cavity is not matched to a certain central wavelength so that in an initial state the cavity is restricted from transmitting light emitted from a light source at the certain central wavelength, and wherein the optomechanical device is adapted so that a set of radiation forces on the first mirror attributable to emission of light at the certain central wavelength with sufficient power results in a resonance wavelength band of the cavity shifting from a wavelength band at which the resonance wavelength band of the cavity is not matched to the certain central wavelength to a wavelength band at which the resonance wavelength band of the cavity is matched to the certain central wavelength.

17. The optomechanical device of claim 1 , wherein the mechanical stop is provided to include a damped response.

18. The optomechanical device of claim 1 , wherein the mechanical stop is provided to include a damped response without oscillation.

19. The optomechanical device of claim 1 , wherein the mechanical stop is resistant to adhering with externally disposed objects.

20. The optomechanical device of claim 1 , wherein the mechanical stop includes a polymer coating so that the mechanical stop is resistant to adhering with externally disposed objects.

21. The optomechanical device of claim 1 , wherein the optomechanical device includes a light source emitting light at a certain central wavelength and wherein the certain position is a position for stabilization of the resonance wavelength band at a wavelength band at which it is matched to the certain central wavelength.

22. The optomechanical device of claim 1 , wherein the optomechanical device includes a light source emitting light at a certain central wavelength and wherein the certain position is a position for stabilization of the resonance wavelength band at a wavelength band at which it is matched to the certain central wavelength so that forward directed light emitted by the light source and incident on the cavity is transmitted through the cavity.

23. The optomechanical device of claim 1 , wherein the optomechanical device includes a light source that emits light at a certain central wavelength, and wherein the optomechanical device is operative so that light emitted from the light source incident on the cavity in a forward direction results in the first set of radiation forces being imparted on the first mirror, and wherein the optomechanical device is further operative so that reflected light transmitted through the cavity having the certain central wavelength incident on the cavity in a backward direction results in the second set of radiation forces being imparted on the first mirror, wherein a sum of the first set of radiation forces, and a sum of the second set of radiation forces are not equal so that there is defined for the cavity a first resonance wavelength band for light incident on the cavity in the forward direction and a second resonance wavelength band for light incident on the cavity in the backward direction.

24. The optomechanical device of claim 1 , wherein the optomechanical device includes a light source that emits light at a certain central wavelength, and wherein the optomechanical device is operative so that light emitted from the light source incident on the cavity in a forward direction results in the first set of radiation forces being imparted on the first mirror, and wherein the optomechanical device is further operative so that reflected light transmitted through the cavity having the certain central wavelength incident on the cavity in a backward direction results in a the second set of radiation forces being imparted on the first mirror, wherein a sum of the first set of radiation forces, and a sum of the second set of radiation forces are not equal so that there is defined for the cavity a first resonance wavelength band for light incident on the cavity in the forward direction and a second resonance wavelength band for light incident on the cavity in the backward direction, wherein the certain central wavelength is matched to the first resonance wavelength band but not matched to the second resonance wavelength band so that the reflected light at the certain central wavelength is not transmitted by the cavity.

25. The optomechanical device of claim 1 , wherein the optomechanical device inclu

Assignees

• Manipatruni Sasikanth
• Lipson Michal
• Robinson Jacob T
• Univ Cornell

Inventors

• Manipatruni Sasikanth
• Lipson Michal
• Robinson Jacob T

Classifications

• H01S3/005

  Optical devices external to the laser cavity, specially adapted for lasers, e.g. for homogenisation of the beam or for manipulating laser pulses, e.g. pulse shaping (shaping laser beam for working metal or other materials B23K26/06; optical elements, systems or apparatus in general G02B) · CPC title

• B81C1/0015

  Cantilevers (switches using MEMS H01H1/0036; electrostatic relays using micromechanics H01H59/0009; microelectro-mechanical resonators H03H9/02244) · CPC title

• B81B2201/047

  Optical MEMS not provided for in B81B2201/042 - B81B2201/045 · CPC title

• G02B6/4209

  Optical features · CPC title

• G02B26/001 Primary

  based on interference in an adjustable optical cavity (interference filters G02B5/28; devices or arrangements using multiple reflections in spectrometry or monochromators G01J3/26) · CPC title