Observation of negative refraction and focusing in two-dimensional photonic crystals

Ekrael Ozbay; Man Bulu; Kaan Guven; Humeyra Caglayan; Koray Aydin

doi:10.1143/JJAP.45.6064

Observation of negative refraction and focusing in two-dimensional photonic crystals

Ekrael Ozbay^*, Man Bulu, Kaan Guven, Humeyra Caglayan, Koray Aydin

^*Corresponding author for this work

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We experimentally and theoretically demonstrate the negative refraction and focusing of electromagnetic (EM) waves by twodimensional photonic crystal slabs at microwave frequencies. The negative refraction is observed both for transverse magnetic (TM) and transverse electric (TE) polarized incident EM waves. Gaussian beam shifting method is used to verify the negative refractive index. The Subwavelength imaging and flat lens behavior of photonic crystals are succesfully demonstrated. We have been able to overcome the diffraction limit and focus the EM waves to a spot size of 0.21λ. Metallodielectric photonic crystals are employed to increase the range of angle of incidence that results in negative refraction. Experimental results and theoretical calculations are in good agreement throughout the work.

Original language	English (US)
Pages (from-to)	6064-6070
Number of pages	7
Journal	Japanese Journal of Applied Physics
Volume	45
Issue number	8 A
DOIs	https://doi.org/10.1143/JJAP.45.6064
State	Published - Aug 4 2006

Keywords

Band diagram
Equal frequency contours
Flat lens
Left-handed materials
Metamaterial
Negative refraction
Photonic band gap
Photonic crystals
Subwavelength imaging

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.45.6064

Cite this

@article{a4e2a14b805c4d48b9d37461e5f43732,

title = "Observation of negative refraction and focusing in two-dimensional photonic crystals",

abstract = "We experimentally and theoretically demonstrate the negative refraction and focusing of electromagnetic (EM) waves by twodimensional photonic crystal slabs at microwave frequencies. The negative refraction is observed both for transverse magnetic (TM) and transverse electric (TE) polarized incident EM waves. Gaussian beam shifting method is used to verify the negative refractive index. The Subwavelength imaging and flat lens behavior of photonic crystals are succesfully demonstrated. We have been able to overcome the diffraction limit and focus the EM waves to a spot size of 0.21λ. Metallodielectric photonic crystals are employed to increase the range of angle of incidence that results in negative refraction. Experimental results and theoretical calculations are in good agreement throughout the work.",

keywords = "Band diagram, Equal frequency contours, Flat lens, Left-handed materials, Metamaterial, Negative refraction, Photonic band gap, Photonic crystals, Subwavelength imaging",

author = "Ekrael Ozbay and Man Bulu and Kaan Guven and Humeyra Caglayan and Koray Aydin",

year = "2006",

month = aug,

day = "4",

doi = "10.1143/JJAP.45.6064",

language = "English (US)",

volume = "45",

pages = "6064--6070",

journal = "Japanese Journal of Applied Physics",

issn = "0021-4922",

publisher = "Japan Society of Applied Physics",

number = "8 A",

}

TY - JOUR

T1 - Observation of negative refraction and focusing in two-dimensional photonic crystals

AU - Ozbay, Ekrael

AU - Bulu, Man

AU - Guven, Kaan

AU - Caglayan, Humeyra

AU - Aydin, Koray

PY - 2006/8/4

Y1 - 2006/8/4

N2 - We experimentally and theoretically demonstrate the negative refraction and focusing of electromagnetic (EM) waves by twodimensional photonic crystal slabs at microwave frequencies. The negative refraction is observed both for transverse magnetic (TM) and transverse electric (TE) polarized incident EM waves. Gaussian beam shifting method is used to verify the negative refractive index. The Subwavelength imaging and flat lens behavior of photonic crystals are succesfully demonstrated. We have been able to overcome the diffraction limit and focus the EM waves to a spot size of 0.21λ. Metallodielectric photonic crystals are employed to increase the range of angle of incidence that results in negative refraction. Experimental results and theoretical calculations are in good agreement throughout the work.

AB - We experimentally and theoretically demonstrate the negative refraction and focusing of electromagnetic (EM) waves by twodimensional photonic crystal slabs at microwave frequencies. The negative refraction is observed both for transverse magnetic (TM) and transverse electric (TE) polarized incident EM waves. Gaussian beam shifting method is used to verify the negative refractive index. The Subwavelength imaging and flat lens behavior of photonic crystals are succesfully demonstrated. We have been able to overcome the diffraction limit and focus the EM waves to a spot size of 0.21λ. Metallodielectric photonic crystals are employed to increase the range of angle of incidence that results in negative refraction. Experimental results and theoretical calculations are in good agreement throughout the work.

KW - Band diagram

KW - Equal frequency contours

KW - Flat lens

KW - Left-handed materials

KW - Metamaterial

KW - Negative refraction

KW - Photonic band gap

KW - Photonic crystals

KW - Subwavelength imaging

UR - http://www.scopus.com/inward/record.url?scp=33748528674&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33748528674&partnerID=8YFLogxK

U2 - 10.1143/JJAP.45.6064

DO - 10.1143/JJAP.45.6064

M3 - Article

AN - SCOPUS:33748528674

SN - 0021-4922

VL - 45

SP - 6064

EP - 6070

JO - Japanese Journal of Applied Physics

JF - Japanese Journal of Applied Physics

IS - 8 A

ER -

Observation of negative refraction and focusing in two-dimensional photonic crystals

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this