Abstract

We present a novel method to mount and align an optical-fiber-based resonator on the flat surface of an atom chip with ultrahigh precision. The structures for mounting a pair of fibers, which constitute the fiber resonator, are produced by a spin-coated SU-8 photoresist technique by use of deep-UV lithography. The design and production of the SU-8 structures are discussed. From the measured finesses we calculate the coupling loss of the SU-8 structures acting as a kind of fiber splice to be smaller than 0.013 dB.

© 2005 Optical Society of America

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References

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  1. R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
    [CrossRef]
  2. R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
    [CrossRef] [PubMed]
  3. P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
    [CrossRef]
  4. Microchem, http://www.microchem.com , NANO SU-8 50;the SU-8 photoresist for MEMS, http://aveclafaux.freeservers.com/SU-8.html .
  5. R. Ruhmann, K. Pfeiffer, M. Falenski, F. Reuther, R. Engelke, G. Grützner, “SU-8: a high performance material for MEMS applications,” Polymers in MEMS, http://www.microchem.com/resources/tok_ebeam_resist.pdf .
  6. M. Wilzbach, Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany, is preparing a manuscript to be called“Building microcavities with optical fibers for single atom detection.”
  7. W. Demtröder, Laser Spectroscopy (Springer-Verlag, 2003).
    [CrossRef]
  8. A. E. Siegman, Lasers (University Science, 1986).
  9. M. Saruwatari, K. Nawate, “Semiconductor laser to single-mode fiber coupler,” Appl. Opt. 18, 1847–1856 (1979).
    [CrossRef] [PubMed]
  10. A. Ghatak, K. Thyagarajan, Introduction to Fiber Optics (Cambridge Univ. Press, 1998).
    [CrossRef]

2003 (1)

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

2002 (1)

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

2000 (1)

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

1979 (1)

Cassettari, D.

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Demtröder, W.

W. Demtröder, Laser Spectroscopy (Springer-Verlag, 2003).
[CrossRef]

Denschlag, J.

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

Domokos, P.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Folman, R.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Ghatak, A.

A. Ghatak, K. Thyagarajan, Introduction to Fiber Optics (Cambridge Univ. Press, 1998).
[CrossRef]

Haase, A.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Henkel, C.

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

Hessmo, B.

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Hinds, E. A.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Horak, P.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Klappauf, B. G.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Krüger, P.

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Maier, T.

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Nawate, K.

Saruwatari, M.

Schmiedmayer, J.

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Siegman, A. E.

A. E. Siegman, Lasers (University Science, 1986).

Thyagarajan, K.

A. Ghatak, K. Thyagarajan, Introduction to Fiber Optics (Cambridge Univ. Press, 1998).
[CrossRef]

Wilzbach, M.

M. Wilzbach, Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany, is preparing a manuscript to be called“Building microcavities with optical fibers for single atom detection.”

Adv. At. Mol. Opt. Phys. (1)

R. Folman, P. Krüger, J. Schmiedmayer, J. Denschlag, C. Henkel, “Microscopic atom optics: from wires to an atom chip,” Adv. At. Mol. Opt. Phys. 48, 263–356 (2002).
[CrossRef]

Appl. Opt. (1)

Phys. Rev. A (1)

P. Horak, B. G. Klappauf, A. Haase, R. Folman, J. Schmiedmayer, P. Domokos, E. A. Hinds, “Possibility of single-atom detection on a chip,” Phys. Rev. A 67, 043806 (2003).
[CrossRef]

Phys. Rev. Lett. (1)

R. Folman, P. Krüger, D. Cassettari, B. Hessmo, T. Maier, J. Schmiedmayer, “Controlling cold atoms using nanofabricated surfaces: atom chips,” Phys. Rev. Lett. 84, 4749–4752 (2000).
[CrossRef] [PubMed]

Other (6)

A. Ghatak, K. Thyagarajan, Introduction to Fiber Optics (Cambridge Univ. Press, 1998).
[CrossRef]

Microchem, http://www.microchem.com , NANO SU-8 50;the SU-8 photoresist for MEMS, http://aveclafaux.freeservers.com/SU-8.html .

R. Ruhmann, K. Pfeiffer, M. Falenski, F. Reuther, R. Engelke, G. Grützner, “SU-8: a high performance material for MEMS applications,” Polymers in MEMS, http://www.microchem.com/resources/tok_ebeam_resist.pdf .

M. Wilzbach, Physikalisches Institut der Universität Heidelberg, Philosophenweg 12, D-69120 Heidelberg, Germany, is preparing a manuscript to be called“Building microcavities with optical fibers for single atom detection.”

W. Demtröder, Laser Spectroscopy (Springer-Verlag, 2003).
[CrossRef]

A. E. Siegman, Lasers (University Science, 1986).

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Figures (3)

Fig. 1
Fig. 1

(a) Fiber resonator of length L, including a gap of length z. Dielectric mirrors are glued to the outer ends of the resonator. (b) Sketches of the possible misalignments at the gap. The mode of diameter 2w0 that leaves the first fiber diverges and is partially coupled into the second fiber, which exhibits a longitudinal displacement z, a transversal displacement m, and an angle misalignment θ.

Fig. 2
Fig. 2

(a) Layout of the alignment structure, (b) a magnified part (dotted rectangle), and (c) the undercut sidewall profile.

Fig. 3
Fig. 3

Microscope images of the cross section of SU-8 structures with the exposure time increasing from (a) to (d).

Equations (1)

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= δ ν Δ ν π i α i ,

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