Polarization Angle Dependence of Optical Gain in a Hybrid Structure of Alexa-Flour 488/M13 Bacteriophage

Inhong Kim,Won-Geun Kim,Seunghwan Lee,Jin-Woo Oh,Irène Wang,Kwangseuk Kyhm,Juyeong Jang,Jean-Claude Vial

doi:10.3390/nano11123309

Abstract

We measured optical modal gain of a dye–virus hybrid structure using a variable stripe length method, where Alexa-fluor-488 dye was coated on a virus assembly of M13 bacteriophage. Inspired by the structural periodicity of the wrinkle-like virus assembly, the edge emission of amplified spontaneous emission was measured for increasing excited optical stripe length, which was aligned to be either parallel or perpendicular to the wrinkle alignment. We found that the edge emission showed a strong optical anisotropy, and a spectral etalon also appeared in the gain spectrum. These results can be attributed to the corrugated structure, which causes a similar effect to a DFB laser, and we also estimated effective cavity lengths.

Highlights

Academic Editors: Rodolphe Antoine and Onofrio M
Bio-lasers are attracting a great deal of attention for biomedical and biological applications, whereby micro-cavities are integrated with biochemical materials [1,2,3]
Regarding the corrugated structure of the dyeM13 bacteriophage, this result is possibly associated with two effects, one-dimensional interference grating and polarization dependence in the waveguide

Summary

Introduction

Academic Editors: Rodolphe Antoine and Onofrio M. Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Bio-lasers are attracting a great deal of attention for biomedical and biological applications, whereby micro-cavities are integrated with biochemical materials [1,2,3]. The lasing of bio-lasers is often evaluated in terms of the narrowness of their spectral linewidth, the intensity of their super-linearity for excitation, and their Q-factor. Optical gain is an important factor with respect to the efficiency of lasing action in micro-bio-cavities [4,5,6]. Optical gain in bio-lasers has not drawn much attention

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Results

Conclusion