Abstract
The terajet, a jet in the terahertz (THz, 0.1-10 THz) region, has attracted considerable research interest owing to its capability to compress beams to subwavelength hotspots. Here, we report a finding of an abnormal asymmetric Gouy phase anomaly in a terajet generated from a Teflon (n = 1.46) cube illuminated by the TM-mode oblique incidences. This asymmetric Gouy phase anomaly causes an interesting deviation angle between the normal of the phase distribution of the Gouy phase anomaly and the propagation direction of the incident beam at the position where the terajet is generated. This deviation angle exponentially decreases as THz waves propagate over several wavelengths. The output angle of the generated terajet, which is evaluated based on the experimental peak values of the amplitude distribution, shows linearity and is identical to the input angle of the incident beam. The full width at half maximum is also maintained within a wavelength for wide angles (45°) of oblique illuminations.
| Original language | English |
|---|---|
| Article number | 201105 |
| Journal | Applied Physics Letters |
| Volume | 110 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 15 May 2017 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Asymmetric phase anomaly of terajet generated from dielectric cube under oblique illumination. / Nguyen Pham, Hai Huy; Hisatake, Shintaro; Minin, Oleg V.; Nagatsuma, Tadao; Minin, Igor V.
In: Applied Physics Letters, Vol. 110, No. 20, 201105, 15.05.2017.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Asymmetric phase anomaly of terajet generated from dielectric cube under oblique illumination
AU - Nguyen Pham, Hai Huy
AU - Hisatake, Shintaro
AU - Minin, Oleg V.
AU - Nagatsuma, Tadao
AU - Minin, Igor V.
PY - 2017/5/15
Y1 - 2017/5/15
N2 - The terajet, a jet in the terahertz (THz, 0.1-10 THz) region, has attracted considerable research interest owing to its capability to compress beams to subwavelength hotspots. Here, we report a finding of an abnormal asymmetric Gouy phase anomaly in a terajet generated from a Teflon (n = 1.46) cube illuminated by the TM-mode oblique incidences. This asymmetric Gouy phase anomaly causes an interesting deviation angle between the normal of the phase distribution of the Gouy phase anomaly and the propagation direction of the incident beam at the position where the terajet is generated. This deviation angle exponentially decreases as THz waves propagate over several wavelengths. The output angle of the generated terajet, which is evaluated based on the experimental peak values of the amplitude distribution, shows linearity and is identical to the input angle of the incident beam. The full width at half maximum is also maintained within a wavelength for wide angles (45°) of oblique illuminations.
AB - The terajet, a jet in the terahertz (THz, 0.1-10 THz) region, has attracted considerable research interest owing to its capability to compress beams to subwavelength hotspots. Here, we report a finding of an abnormal asymmetric Gouy phase anomaly in a terajet generated from a Teflon (n = 1.46) cube illuminated by the TM-mode oblique incidences. This asymmetric Gouy phase anomaly causes an interesting deviation angle between the normal of the phase distribution of the Gouy phase anomaly and the propagation direction of the incident beam at the position where the terajet is generated. This deviation angle exponentially decreases as THz waves propagate over several wavelengths. The output angle of the generated terajet, which is evaluated based on the experimental peak values of the amplitude distribution, shows linearity and is identical to the input angle of the incident beam. The full width at half maximum is also maintained within a wavelength for wide angles (45°) of oblique illuminations.
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U2 - 10.1063/1.4983640
DO - 10.1063/1.4983640
M3 - Article
VL - 110
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 20
M1 - 201105
ER -