Diffraction focal position and vector diffraction theory for micro holographic storage systems

Cheol Ki Min, Hyungbae Moon, Do Hyung Kim, No Cheol Park, Kyoung Su Park, Young Pil Park

Research output: Contribution to journalArticlepeer-review


In this study, we proposed a method to determine the optimal focal position for micro-holographic storage systems, using vector diffraction theory; the theory provides exact solutions when the numerical aperture (NA) exceeds 0.6. The best diffraction focus was determined by the position and wavelength corresponding to minimal spherical aberration. The calculated refractive index modulation, polarization illumination, and boundary conditions at the interface of different media were analyzed. From the results of our analysis, we could confirm the size of micrograting as a function of NA and wavelength, based on vector diffraction theory, compared with scalar diffraction theory which defines the micrograting by λ/(2NA) . To demonstrate our analysis, we adapted an optical alignment method using a Twyman-Green interferometer, and could obtain good agreement between analysis and experimental results.

Original languageEnglish
Pages (from-to)57-65
Number of pages9
JournalApplied Sciences (Switzerland)
Issue number1
Publication statusPublished - 2014 Mar 1

Bibliographical note

Publisher Copyright:
© 2013 by the authors.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes


Dive into the research topics of 'Diffraction focal position and vector diffraction theory for micro holographic storage systems'. Together they form a unique fingerprint.

Cite this