Document type

Conference papers

Document subtype

Abstract

Title

PT-symmetric bound states in the continuum

Participants in the publication

Y. V. Kartashov (Author)

C. Milan (Author)

V. V. Konotop (Author)

Dep. Física

CFTC - Centro de Física Teórica e Computacional

L. Torner (Author)

Scope

International

Refereeing

Yes

Summary

We show that 2D parity-time (PT)-symmetric structure built as a chain of waveguides, where all waveguides except for the central one are conservative, while the central one is divided into two halves with gain and losses, admits hound states in the continuum (BICs) whose properties vary drastically with the orientation of the line separating amplifying and absorbing domains, which sets the direction of internal energy flow. When the flow is perpendicular to the waveguide chain, narrow BICs emerge when the defect mode located in the finite gap, collides with another mode in standard symmetry-breaking scenario and its eigenvalue enters the continuous spectrum upon increase of the strength of gain/losses. When the energy flow is parallel to the chain of the waveguides, the symmetry gets broken even for a small strength of the gain/losses. In that case, the most rapidly growing mode emerges inside the continuous spectrum and realizes a weakly localized BIC.

Event

2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018)

Publication Identifiers

ISBN - 9781538636121

Document Identifiers

ISBN - 978-1-5386-3612-1

Conference papers

Document subtype

Abstract

Title

PT-symmetric bound states in the continuum

Participants in the publication

Y. V. Kartashov (Author)

C. Milan (Author)

V. V. Konotop (Author)

Dep. Física

CFTC - Centro de Física Teórica e Computacional

L. Torner (Author)

Scope

International

Refereeing

Yes

Summary

We show that 2D parity-time (PT)-symmetric structure built as a chain of waveguides, where all waveguides except for the central one are conservative, while the central one is divided into two halves with gain and losses, admits hound states in the continuum (BICs) whose properties vary drastically with the orientation of the line separating amplifying and absorbing domains, which sets the direction of internal energy flow. When the flow is perpendicular to the waveguide chain, narrow BICs emerge when the defect mode located in the finite gap, collides with another mode in standard symmetry-breaking scenario and its eigenvalue enters the continuous spectrum upon increase of the strength of gain/losses. When the energy flow is parallel to the chain of the waveguides, the symmetry gets broken even for a small strength of the gain/losses. In that case, the most rapidly growing mode emerges inside the continuous spectrum and realizes a weakly localized BIC.

Date of Publication

2018

2018

Event

2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018)

Publication Identifiers

ISBN - 9781538636121

Document Identifiers

ISBN - 978-1-5386-3612-1

APA

Y. V. Kartashov, C. Milan, V. V. Konotop, L. Torner, (2018). PT-symmetric bound states in the continuum. 2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018), -

IEEE

Y. V. Kartashov, C. Milan, V. V. Konotop, L. Torner, "PT-symmetric bound states in the continuum" in 2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018), , 2018, pp. -, doi:

BIBTEX

@InProceedings{39990, author = {Y. V. Kartashov and C. Milan and V. V. Konotop and L. Torner}, title = {PT-symmetric bound states in the continuum}, booktitle = {2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018)}, year = 2018, pages = {-}, address = {}, publisher = {} }

Y. V. Kartashov, C. Milan, V. V. Konotop, L. Torner, (2018). PT-symmetric bound states in the continuum. 2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018), -

IEEE

Y. V. Kartashov, C. Milan, V. V. Konotop, L. Torner, "PT-symmetric bound states in the continuum" in 2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018), , 2018, pp. -, doi:

BIBTEX

@InProceedings{39990, author = {Y. V. Kartashov and C. Milan and V. V. Konotop and L. Torner}, title = {PT-symmetric bound states in the continuum}, booktitle = {2018 INTERNATIONAL CONFERENCE LASER OPTICS (ICLO 2018)}, year = 2018, pages = {-}, address = {}, publisher = {} }