optical cavity with high quality factor q l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Optical cavity with high quality factor Q PowerPoint Presentation
Download Presentation
Optical cavity with high quality factor Q

Loading in 2 Seconds...

play fullscreen
1 / 15

Optical cavity with high quality factor Q - PowerPoint PPT Presentation


  • 296 Views
  • Uploaded on

Optical cavity with high quality factor Q. Photonic crystals course final presentation Karin Söderström . Outline. 1) Optical cavities and their use (history) 2) Quality factor Q 3) Lots of cavities 4) Applications of Cavities with PHC Quantum optic

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

Optical cavity with high quality factor Q


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
optical cavity with high quality factor q

Optical cavity with high quality factor Q

Photonic crystals course final presentation

Karin Söderström

outline
Outline

1) Optical cavities and their use (history)

2) Quality factor Q

3) Lots of cavities

4) Applications of Cavities with PHC

  • Quantum optic
  • Frequency selective devices

Karin Söderström

optical cavities and their use
Optical cavities and their use
  • The simplest optical cavity: A Fabry-Pérot resonator is composed of two parallel mirrors
  • Associated with an active medium this cavity realized with one mirror with R<100% leads to one of the greatest discovery of the century

Laser by Th. Maiman Nature187, 493-494 (1960)

Macro-cavity

Karin Söderström

optical cavities and their use4
Optical cavities and their use
  • One of the first study on resonator lead to the theoretical great result:
    • By placing a two-level system in a resonator you can modify (enhance or stop) the spontaneous emission of the two–level system

E.M.Purcell Phys. Rev. 69 (1946) p. 681

  • This information lead to many hope in different field:
    • One photon source
    • Quantum entanglement of radiation and matter is possible

P. Michler, A. Kiraz, C. Becher, W. V. Schoenfeld, P. M. Petroff, Lidong Zhang, E. Hu, and A. Imamoglu (2000) Science290 (5500), 2282.

Thompson, R. J., Rempe, G. & Kimble, H. J. Phys. Rev. Lett. 68, 1132–1135 (1992).

Karin Söderström

quality factor q
Quality factor Q

Definition:Q=Pin the cavity /PLosses α lifetime photon in the cavity t

Q α 1/g where g is the linewidth

If R , Q . The quality of the information .

Karin Söderström

lots of different cavities
Lots of different cavities

Fabry-Pérot cavity made of two Bragg mirrors

Cavity made by a defect in a photonic crystal

Kerry J. Vahala, Nature, 424, 6950, 839, (2003)

Karin Söderström

outline7
Outline

1) Optical cavities and their use (history)

2) Quality factor Q

3) Lots of cavities

4) Cavities with PHC

  • Quantum optic
  • Frequency selective devices

Karin Söderström

phc cavities applications
PHC Cavities Applications
  • Quantum optics:
      • Control of the radiative lifetime (Purcell Effect) Fp α Qmode/Vmode

Miniature laser, LED, VCSEL, mW threshold

Control of the t in a micropillar

  • Solomon et al,Phys.Rev.lett., 86, 17, 3903, (2001).
  • Painter,O. et al. Science 284, 1819–1821 (1999).
  • Applications:
    • Data transport in optical fiber.
    • Easy writing and reading of CD, DVD (small spot size)

t=1.3ns t=280ps

Karin Söderström

phc cavities applications9
PHC Cavities Applications
  • Quantum optics:
    • Strong coupling (of great interest due to the mode volume)

single-atom cavity quantum electrodynamics in the strong coupling regime

Theoretically proven: Vuckovic et al, Phys. Rev. E, 65, 016608, (2001)

Experimentally shown: Yoshie et al, Nature432, 200-203 (2004) for a QD

Applications:

Study of center of mass motion: Rempe, Applied physics. B, 60, 233 (1995)

Single photon source: B Deveaud-Pledran, et al - US Patent App. 11/394,518, (2006)

Beauty of physics BEC Theoretical: E Ostrovskaya, Y Kivshar, Optics Exp. vol12, (2004)

Karin Söderström

phc cavities applications10
PHC Cavities Applications
  • Frequency devices (the mode volume is less important)

Akahane et al, Nature, 425, 6961, 944, (2003)

  • Applications:
    • Very small spectrometer, Multiplexer, Demultiplexer, Filters, Spectroscopy

Karin Söderström

phc cavities applications11
PHC Cavities Applications
  • Frequency devices (Vmode is less important, here Q=400)
  • Applications: Very small spectrometer, Multiplexer, Demultiplexer

Noda et al, Nature, 407, 608, (2000)

Shinya et al, Optics Exp,14, 25, 12394, (2006)

Karin Söderström

phc cavities applications12
PHC Cavities Applications
  • Frequency devices (the mode volume is less important)
  • Applications: Filters

Qth: 7*10^7

Kuramochi et al, Appl. Phys. Lett., 88, 041112, (2006)

Karin Söderström

phc cavities applications13
PHC Cavities Applications
  • Frequency devices (the mode volume is less important)

Application: Spectroscopy tool

A photonic crystal sensor with a resolution

of better than Dn =0.002 with a Q factor of 400

In this case it is not a bridge: small amount of sample only needed

The Caltech

Nanofabrication

Group

Chow et al, Optics letters, 29, 10, 1093, (2004)

Karin Söderström

conclusions
Conclusions
  • The cavity is the basis to construct devices with photonic crystals with different functionality modes
        • Single photon source needed for quantum computation
  • Lots of progresses can be made on Q (from theoretical studies) but the limits of the fabrication process can be reached before
  • Lots of different applications in many fields
        • Laser, spectrometer, multiplexer, filter, spectroscopy

Karin Söderström

slide15

Thanks for your attention

?Questions?

?Questions?

?Questions?

?Questions?

Karin Söderström