A 1.5D Photonic Crystal Interface for Prism-Free, Near-Normal, Low-Background Photoluminescence

Nano Letters 2026

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Authors: Leyang Liu, Seemesh Bhaskar, Joseph Tibbs, Sudha Maria Lis S, Somnath Pandit, Shivakiran Bhaktha B. N., Brian T. Cunningham
DOI: 10.1021/acs.nanolett.6c00687
Cited by: 2
References: 30

Abstract

Bragg mirror to form a 1.5D photonic crystal (PC). Bound states in the continuum-enabled resonances in the PCG increase PL spectral flux, polarization selectivity, and near-normal outcoupling, while the PCM suppresses broadband background via stopband filtering and improves PL extraction by recycling downward radiation through radiative boundary-condition engineering. Relative to standalone PCGs or PCMs, the interface achieves up to 5.2-fold improvement in signal-to-background ratio, supported by angle-resolved spectroscopy, back-focal-plane imaging, and numerical simulations. This 1.5D PC establishes a scalable, compact route to high-contrast fluorescence readout for next-generation biosensing and bioimaging.

Fields of Study & Subjects

Photonic Crystals and Applications Photonic and Optical Devices Quantum optics and atomic interactions

Publication details

Journal / source
Nano Letters
Publisher
American Chemical Society (ACS)
Volume
26
Issue
13
Pages
4489–4496
Publication date
23 March 2026
Language
EN