Flat focusing in reflection from a chirped dielectric mirror with a defect layer

Yu-Chieh Cheng; Simonas Kicas; Kestutis Staliunas

doi:10.1117/1.JNP.9.093084

4 March 2015 Flat focusing in reflection from a chirped dielectric mirror with a defect layer

Yu-Chieh Cheng, Simonas Kicas, Kestutis Staliunas

Author Affiliations +

Journal of Nanophotonics, Vol. 9, Issue 1, 093084 (March 2015). https://doi.org/10.1117/1.JNP.9.093084

Abstract

Recently, the principle of flat focusing based on one-dimensionally chirped dielectric mirrors has been proposed and experimentally demonstrated. The flat chirped mirror causes anomalous diffraction of the beam during reflection, opposite to the normal diffraction in free space propagation. The anomalous diffraction compensates the normal diffraction of the beam resulting in focusing after reflection. For a better focusing performance and for a larger near-field focal distance, a stronger anomalous diffraction is required. We show that the anomalous diffraction can be enhanced by introducing a defect layer in the chirped mirror, as the structure becomes similar to a Gires–Tournois interferometer. The focal distance can be substantially increased due to the defect layer. In our specific structure, the focal distance shows an increase from 19 to 39 μm, numerically.

Citation Download Citation

Yu-Chieh Cheng, Simonas Kicas, and Kestutis Staliunas "Flat focusing in reflection from a chirped dielectric mirror with a defect layer," Journal of Nanophotonics 9(1), 093084 (4 March 2015). https://doi.org/10.1117/1.JNP.9.093084

Published: 4 March 2015

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available