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Cavity  Optomechanics

Interaction between the optical and mechanical modes in microstructures is a relatively new field that has been subject of intensive research since 2004.  In a high-Q optomechanical cavity  circulating optical power and mechanical displacement are coupled  through optical radiation pressure or E-field gradient force. Beyond their interesting dynamics, the optomechanically coupled systems are potential candidates for low power all-optical switching, photonic clock and local oscillator generation, quantum information processing, photonic RF frequency conversion and mass sensing. In 2010 both Nature Magazine and Science Magazine have highlighted cavity optomechanics as being among the most developing research fields in the past decade. We work on physics and application of resonant optomechanical interaction.
Specifically we explore radiation pressure driven oscillators and their application in RF-Photonic and Photonic Sensing.

                                     Physics and applications of optomechanical oscillator (OMO)


* General properties:
   M. Hossein-Zadeh, H. Rokhsari, A. Hajimiri and K. J. Vahala, “Characterization of a radiation-pressure-driven optomechanical oscillator,  
   Physical Review A,
vol. 74(2), 023813, Aug 2006. (Also appeared on Virtual Journal of Nanoscale Science & Technology, vol. 14(10), Aug. 2006)
   M. Hossein-Zadeh, and K. J. Vahala, "Optomechanical Oscillator on a Silicon Chip", Invited paper
Journal of Selected Topics in Quantum Electronics, special issue on Silicon Photonics, vol. 16, no. 1, pp. 276-287, Jan/Feb 2010. 
* Brownian Noise:
   H. Rokhsari, M. Hossein-Zadeh, Ali Hajimiri, and K. J. Vahala, “Brownian noise in radiation-pressure-driven micromechanical oscillators,
   Applied Physics Letters,
vol. 89(6), 261109, Dec 2006.
* Optical spring effect:
   M. Hossein-Zadeh, and K. J. Vahala, “Observation of optical spring effect in a microtoroidal optomechanical resonator”,
   Optics Letters, vol. 32, no. 12, pp. 1611-1613, June 2007.(Also appeared on Virtual Journal of Nanoscale Science & Technology, vol. 16(4), July 2007)
* Injection locking:
  M.  Hossein-Zadeh, and K. J. Vahala, “Observation of injection locking in an optomechanical RF oscillator”,
Applied Physics Letters, vol. 93, 191115, Nov 2008. (Also appeared on Virtual Journal of Nanoscale Science & Technology, vol. 18(22), Dec 2008)
* Spectral properties:
  F. Liu, and M. Hossein-Zadeh, "On the spectrum of the radiation-pressure -driven optomechanical oscillator and its application in sensing" ,
  Optics Communications, vol. 294, pp. 338-343, March, 2013.

Stabilization of optomechanical oscillator
  K. Huang and M. Hossein-Zadeh, " Direct stabilization of  Optomechanical Oscillators,
Optics Letters
, Vol. 42,  No. 10, pp. 1946-1949, May 2017.
*Locking via Acoustic waves
 K. Huang and M. Hossein-Zadeh,Injection Locking of  Optomechanical Oscillators via Acoustic Waves,
International Conference on Optical MEMS and Nanophotonics (OMN) 2017

------- Applications
* RF mixing
   M. Hossein-Zadeh, and K. J. Vahala, “Photonic RF down-converter based on optomechanical oscillation”,
   IEEE Photonics Technology Letters, vol. 20, no. 4, pp. 234-236, Feb 2008.
* Mass sensing
F. Liu, and M. Hossein-Zadeh, "Mass Sensing with Optomechanical Oscillation, IEEE Sensors, vol 13, no. 1, pp. 146-147, Jan 2013.
   F. Liu, Seyedhamidreza Alaie, Zayd C. Leseman, and M. Hossein-Zadeh, "Sub-pg mass sensing and measurement with an optomechanical oscillator,
  Optics Express, vol. 21,  no.17, pp. 19555-19567, Aug 2013.
* Optomechanical RF receiver
  F. Liu, and M. Hossein-Zadeh, " Characterization of Optomechanical RF frequency mixing/down-conversion and its application in photonic RF receivers,
IEEE Journal of Light Wave Technology
, Vol. 32, No. 2, pp. 309-317,  Jan 2014.