High Q-contrast terahertz quantum cascade laser via bandgap-confined bound state in the continuum.

Hanyu Liu, Jieyuan Cui, Qian Wang, Lianhe Li, Alexander Giles Davies, Edmund Harold Linfield, Qi Jie Wang

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Article in Nanophotonics (Berlin, Germany), 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1citing papers in PubMed

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1 · What the graph read from it

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3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

Quantum cascade laser: 30 years of discoveries.Nanophotonics (Berlin, Germany) · 2025
Article

4 · The record

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5 · Who and what money

Authors and funding

7 authors.

Hanyu LiuCentre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering & The Photonics Institute, Nanyang Technological University, 639798, Singapore, Singapore.

Jieyuan CuiCentre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering & The Photonics Institute, Nanyang Technological University, 639798, Singapore, Singapore.

Qian WangInstitute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, #08-03, Innovis, 138634, Singapore, Singapore.ORCID https://orcid.org/0000-0003-0750-7843

Lianhe LiSchool of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK.

Alexander Giles DaviesSchool of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK.

Edmund Harold LinfieldSchool of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, UK.

Qi Jie WangCentre for OptoElectronics and Biophotonics, School of Electrical and Electronic Engineering & The Photonics Institute, Nanyang Technological University, 639798, Singapore, Singapore.ORCID https://orcid.org/0000-0002-9910-1455

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Photonic bound states in the continuum (BICs) are optical modes that remain highly localized despite co-existing with radiating waves in the continuum, attracting considerable attention for both fundamental studies and technological innovations. Conventional single-mode BIC lasers predominantly focus on maximizing the Q-factor of a specific mode, often overlooking the critical role of Q-contrast - the difference in Q-factors between the highest-Q BIC mode and competing modes - which is crucial for achieving stable single-mode lasing. In this study, we present a compact, high Q-contrast BIC laser, enabled by strategically optimizing the alignment of the TM

Indexed as

bound state in the continuumphotonic crystalQ-contrastterahertz

Identifiers

PMID41142095

DOI10.1515/nanoph-2024-0757

PMCPMC12552860

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.