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Related to Subwavelength: optical fiber, Surface plasmon


the distance, measured in the direction of propagation, between two points of the same phase in consecutive cycles of a wave.
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


The distance between two points on a wave which have the same value and the same rate of change of the value of a parameter, for example, electric intensity, characterizing the wave. The wavelength, usually designated by the Greek letter λ, is equal to the speed of propagation c of the wave divided by the frequency of vibration f; that is, λ = c/f (see illustration). See Wave (physics), Wave motion

Wavelength λ and related quantitiesenlarge picture
Wavelength λ and related quantities
McGraw-Hill Concise Encyclopedia of Physics. © 2002 by The McGraw-Hill Companies, Inc.


(wayv -length) Symbol: λ. The distance over which a periodic wave motion goes through one complete cycle of oscillation, i.e. the distance traveled during one period. Thus for a sinusoidal wave motion, such as electromagnetic radiation, it is the distance between two successive peaks or troughs. For electromagnetic radiation, wavelength is related to frequency, ν, by νλ = c , where c is the speed of light. Wavelength is measured in meters or in multiples or submultiples of meters; for example, the wavelength of light is usually given in nanometers while that of infrared radiation is usually quoted in micrometers.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006


The distance between two points having the same phase in two consecutive cycles of a periodic wave, along a line in the direction of propagation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


For light waves or sound waves, the distance between two successive points of a periodic wave in the direction of propagation, in which the oscillation has the same phase; the distance the wave travels in one period. For light waves three common units of wavelength are: micrometer, nanometer, and angstrom.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


The distance between crests of a wave. The wavelength determines the nature of the various forms of radiant energy that comprise the electromagnetic spectrum. For electromagnetic waves, the wavelength in meters is computed by the speed of light divided by frequency (300,000,000/Hz). For sound waves, the wavelength is determined by 335/Hz. See optical bands.

Length of a Wave
The wavelength is the distance between crests. The higher the frequency, the shorter the wavelength.

Cellular/Wi-Fi/Bluetooth/Cordless PhonesFrequency        WavelengthBand                     Inches         Millimeters  (approximate)

   600 MHz     500         20"

   1.8 GHz     167         6 1/2"

   2.4 GHz     125         5"
   5   GHz      60         2 1/2"

  High 5G Bands
  24   GHz      12.5       1/2"
  27.5 GHz      11         7/16"
  37   GHz       8         5/16"
  47   GHz       6.3       1/4"
  64   GHz       4.7       3/16"
  71   GHz       4.2       1/8"

Visible Light in Nanometers
The wavelengths of light visible by humans is approximately from 400 to 750 nm.
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References in periodicals archive ?
In view of the infinite orthogonally rib-stiffened sandwich structure flexibly connected with periodic subwavelength arrays of finite shunted piezoelectric patches (hereafter termed research structure), the studies on STL prediction of the research structure are blank.
If the structure generates a subwavelength long focal depth and satisfies the limiting conditions of side lobe intensity of less than 15%, it is chosen as the initial structure during the optimization procedures.
Another relatively easy to fabricate subwavelength surface modifications are photonic crystals.
Chan, "Directive emissions from subwavelength metamaterial-based cavities," Antenna Technology: Small Antennas and Novel Metamaterials, Vol.
Second, to realize the low dielectric constant in the first layer using only the HDPE, the duty cycle of a subwavelength grating was set to f = 0.36 so that the effective dielectric constant was 1.1 for the electric field aligned parallel to the grating grooves.
Advanced anti-reflection SubWavelength Structure Coating (SWC) and Super Spectra Coating also reduce ghosting and flare.
As with their RF counterparts, optical antennas have the ability to focus free space radiation to a very small subwavelength volume with high field enhancements.
Among specific topics are optoelectronic techniques for generating and detecting terahertz waves, terahertz wireless communications, the resonant field enhancement of terahertz waves in subwavelength plasmonic structures, novel techniques in terahertz near-field imaging and sensing, terahertz frequency metrology based on frequency comb techniques, terahertz applications in tomographic imaging and material spectroscopy, terahertz applications in wood products, and terahertz applications in art conservation.
Unique applications have been highlighted, such as phase compensation, electrically small resonators, negative angles of refraction, subwavelength waveguides with lateral dimension below diffraction limits, high-performance focusing, backward-wave media, photon tunneling and electrically small antennas [1, 3-5].
It should be noted that microwave near-field probes also have the capability of subwavelength imaging by using the near field around a probe tip (see Sec.
These experiments showed highly unusual transmission properties of metal films perforated with a periodic array of subwavelength holes, because the electric field is highly localized inside the grooves (around 300-1000 times larger than intensity of incoming optical light).