Design of a C aperture to achieve λ/10 resolution and resonant transmission

Small subwavelength apertures provide high spatial resolution that is not limited by the diffraction limit. However, application of these apertures to practical problems has been hindered by the critical problem of extremely low power transmission efficiency. Recently, we reported a specially designed subwavelength aperture that has a letter C shape (X. Shi, R. L. Thornton, and L. Hesselink, Opt. Lett. 28, 1320 (2003)]. A well-designed C aperture can provide both a high spatial resolution of ~λ/10 and a high power throughput greater than 1. We present the underlying design ideas of the C aperture and report interesting general properties of optical transmissions through a single two-dimensional subwavelength aperture, based on numerical finite-difference time-domain simulations and fundamental observations. These results are expected to provide helpful information for both C-aperture applications and general studies of subwavelength metallic structures.

[1]  E. Synge.  XXXVIII. A suggested method for extending microscopic resolution into the ultra-microscopic region , 1928 .

[2]  H. Bethe.  Theory of Diffraction by Small Holes , 1944 .

[3]  E. Ash,et al.  Super-resolution Aperture Scanning Microscope , 1972, Nature.

[4]  M. Isaacson,et al.  Development of a 500 Å spatial resolution light microscope: I. light is efficiently transmitted through λ/16 diameter apertures , 1984 .

[5]  W. Denk,et al.  Optical stethoscopy: Image recording with resolution λ/20 , 1984 .

[6]  G. H. Morrison,et al.  Parameter control, characterization, and optimization in the fabrication of optical fiber near-field probes. , 1995, Applied optics.

[7]  D. Pohl,et al.  Scanning near-field optical probe with ultrasmall spot size. , 1995, Optics letters.

[8]  D. Zeisel,et al.  Pulsed laser‐induced desorption and optical imaging on a nanometer scale with scanning near‐field microscopy using chemically etched fiber tips , 1996 .

[9]  H. Lezec,et al.  Extraordinary optical transmission through sub-wavelength hole arrays , 1998, Nature.

[10]  Thomas W. Ebbesen,et al.  Surface plasmons enhance optical transmission through subwavelength holes , 1998 .

[11]  Thomas W. Ebbesen,et al.  Beyond the Bethe Limit: Tunable Enhanced Light Transmission Through a Single Sub-Wavelength Aperture , 1999 .

[12]  F. García-Vidal,et al.  Transmission Resonances on Metallic Gratings with Very Narrow Slits , 1999, cond-mat/9904365.

[13]  H. Lezec,et al.  Control of optical transmission through metals perforated with subwavelength hole arrays. , 1999, Optics letters.

[14]  J. Pendry,et al.  Theory of extraordinary optical transmission through subwavelength hole arrays. , 2000, Physical review letters.

[15]  Y. Takakura,et al.  Optical resonance in a narrow slit in a thick metallic screen. , 2001, Physical review letters.

[16]  Thomas W. Ebbesen,et al.  Fornel, Frédérique de , 2001 .

[17]  Lambertus Hesselink,et al.  Nano-aperture with 1000x power throughput enhancement for very small aperture laser system (VSAL) , 2002, Optical Data Storage.

[18]  Q-Han Park,et al.  Light emission from the shadows: Surface plasmon nano-optics at near and far fields , 2002 .

[19]  J. Sambles,et al.  Resonant transmission of microwaves through a narrow metallic slit. , 2002, Physical review letters.

[20]  Lambertus Hesselink,et al.  Ultrahigh light transmission through a C-shaped nanoaperture. , 2003, Optics letters.

[21]  D. Lenstra,et al.  Light transmission through a subwavelength slit: waveguiding and optical vortices. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[22]  K Tanaka,et al.  Simulation of an aperture in the thick metallic screen that gives high intensity and small spot size using surface plasmon polariton , 2003, Journal of microscopy.